Heliyon 9 (2023) e14154 Contents lists available at ScienceDirect Heliyon journal homepage: www.cell.com/heliyon Research article Total reward satisfaction profiles and work performance: A person-centered approach Chunling Li *, Xueyun Duan, Xiangling Chu, Yong Qiu Business School, Beijing Technology and Business University, Beijing, 100048, China A R T I C L E I N F O A B S T R A C T Keywords: A person-centered approach Latent profile analysis (LPA) Total reward satisfaction (TRS) Work performance It has recently become an incentive management challenge for organizations to implement a total reward system. Existing variable-centered studies have neglected to explore the incentive effect of a total reward system from the perspective of individual differences. Our study aimed to initially investigate the profiles of total reward satisfaction (TRS) and the impact of these profiles on work performance. Using a person-centered approach, two studies were conducted using retail industry employees in China as samples. Study 1 identified the TRS profiles of 429 samples using latent profile analysis. Study 2 replicated Study 1’s configuration of profiles and examined the rela­ tionship of these profiles with demographic variables and work performance using 885 samples. Our results were as follows: (1) there were four quantitatively and qualitatively distinct profiles (subpopulations) of TRS, namely, dissatisfied (DS), development and career opportunities satisfied-dominant (DOS-dominant), work-life balance satisfied-dominant (WLS-dominant), and compensation satisfied-dominant (CS-dominant); (2) demographic variables involving gender, age, education, and position level affected the likelihood of membership in each TRS profile; and (3) the four profiles predicted different levels of work performance, or more specifically, different levels of task and contextual performance. The task and contextual performance of the four subpopulations listed from best to worst were WLS-dominant, DOS-dominant, CS-dominant, and DS. For practical management, organizations should customize a classified total reward system according to employee subpopulations to improve work performance. 1. Introduction With the current situation that organizations generally face financial difficulties due to the COVID-19 pandemic, improving employee work performance has been a critical issue in organizational incentive management. Since a single financial reward is no longer considered the only driver for employees, organizations attempt to improve work performance by providing the right total reward system as an employee-driven system, especially when they face difficulties in offering higher financial rewards [1,2,3,4]. Total reward refers to all forms of non-financial and financial returns offered by organizations to their employees [5]. At present, many organizations across industries worldwide popularly implement a total reward system [3,6,7]. A total reward system is distinctly characterized by a customized combination of rewards that can satisfy the needs or preferences of individuals [8,9]. Therefore, many practitioners are increasingly concerned about how total reward satisfaction (TRS) promotes work performance. However, extant research provides almost no guidance for management practice in this regard. * Corresponding author. E-mail address: licl@th.btbu.edu.cn (C. Li). https://doi.org/10.1016/j.heliyon.2023.e14154 Received 2 June 2022; Received in revised form 21 February 2023; Accepted 23 February 2023 Available online 28 February 2023 2405-8440/© 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Heliyon 9 (2023) e14154 C. Li et al. Although the existing research is persistently concerned about the relationship between reward satisfaction and work performance, empirical investigations barely pay attention to TRS as a multidimensional construct [10,11]. Moreover, the extant research pays far more attention to financial reward satisfaction than to non-financial reward satisfaction [3,7,10,12]. In addition, the conclusions of the existing studies are controversial. Some studies regard certain financial reward (e.g., monetary) satisfaction as motivating [13,14], whereas others see certain non-financial reward satisfaction as motivating [3,5,15]. The main reason for the above controversies stems from the limitations of the variable-centered approach [16], which has resulted in most previous studies focusing on the effect of certain TRS dimensions on work performance. This approach investigates the "average" and independent effects of one variable on another by assuming that the population of a sample is homogeneous [16]. However, there are two weaknesses to the variable-centered approach. One is that a sample’s population does not conform to the homogeneous assumption in reality [17]. The other is that the use of this approach makes it difficult to interpret the complex interaction effects between variables [18]. Previous studies have ignored the potential combination of TRS dimensions and failed to detect not only how individuals in multiple sub­ populations of a sample could experience differential satisfaction with various dimensions of total reward but also how the differences in subpopulations affect performance [5,19]. Therefore, this research introduces a person-centered approach to complement the shortcomings of a variable-centered approach [16]. Assuming the heterogeneous population of a sample [16,17], a study based on a person-centered approach can determine possible profiles (subpopulations) consisting of variable dimensions by latent profile analysis (LPA) and explore the relation of profiles to covariates using mixture models [20,21]. The driving of employee outcomes by total reward is a complex and dynamic mechanism, and there are individual differences in the effect on individual behaviors of different forms of total reward [22]. Our research explores whether TRS profiles (subpopulations) differ, how demographic variables predict these profiles, and how these profiles exhibit different levels of work performance. To sum up, our research presents another way of looking at the same reality [20]; that is, it not only advances the theoretical research on total reward incentive from the perspective of individual differences but also offers a classification system for management based on the types of employee subgroups [17,23]. Therefore, our results can serve to guide organizations in implementing classification management policies for total reward systems to improve work performance. There are few existing studies on TRS profiles; thus, our study seems unsuitable for raising hypotheses about the configurations of profiles and their relationship to work performance. Consequently, in short, our study pursues exploratory questions and tests them with two samples of employees drawn from the retail industry in China. Study 1 examines whether TRS profiles (subpopulations) differ; Study 2 replicates the configuration of profiles in Study 1 and explores how demographic variables affect these profiles and how these profiles exhibit different levels of work performance. 2. Theoretical background 2.1. TRS profiles TRS refers to the degree to which negative or positive attitudes are expressed by employees regarding their received rewards [3,5]. There are several views on the dimensions of TRS measurements [3,7]. Among measurements, the five-dimension measurement is based on the generally recognized five components of total reward [22], whose reliability and validity were confirmed by Chinese retail enterprise employees [3]. In summary, the present study adopts the five-dimension measurement. From a person-centered perspective, various dimensions of TRS may form different configurations, i.e., latent profiles. Profile indexes can qualitatively and quantitatively classify profiles [21,24,25]. Quantitative distinctions in profiles (level) refer to absolute differences in profile indexes. In contrast, qualitative distinctions in profiles (shapes) refer to relative differences in profile indexes. Thus, there may be quantitative differences among TRS profiles, i.e., all five dimensions of satisfaction in one profile are high, while all five dimensions of satisfaction in another profile are low. In contrast, there may also be qualitative differences among TRS profiles, i.e., one or two dimensions of satisfaction are dominant in one profile but not in another. For instance, one profile has high compensation satisfaction and low satisfaction in other dimensions, whereas another has high benefit satisfaction and low satisfaction in other di­ mensions. There have been only a few studies on TRS applying a person-centered approach to date. Their findings using cluster-wise regression suggest the presence of different employee subgroups in the relation of TRS to turnover intention and job satisfaction [5,19]. Since cluster-wise regression is less accurate and efficient than LPA for identifying classification [20], these two studies contain insufficient direct evidence for determining profiles. In conclusion, although we cannot assume the way in which five dimensions of TRS can be combined in different profiles, we anticipate finding profiles that differ quantitatively and/or qualitatively. Thus, the research question (RQ) we propose is as follows: RQ 1. Are there distinct TRS profiles with regard to quantity and/or quality? 2.2. Demographic variables and TRS profiles According to need hierarchy theory, the level of people’s particular needs varies [26,27], which means that their need or value for a particular type of total reward may differ [9]. It has been demonstrated in previous studies that employees of different gender, age, marital status, children’s age and position levels had significant differences in the value they placed on different types of total rewards. Men pay more attention to financial rewards, and women with children are more likely to value work-life balance; young employees (especially non-managers) prefer career development more than older employees do, but older or female breadwinners are more likely to value benefits [28]. Older employees prefer financial rewards more than younger employees do [29]. Generation Z employees (the 2 Heliyon 9 (2023) e14154 C. Li et al. millennial generation) draw more attention to ability enhancement and support from the leader than monetary rewards [11,30]. Government employees in safe positions value intrinsic rewards more, while those in unsafe positions give greater value to extrinsic rewards [31]. Lower-level managers attach more importance to bonuses than middle-level managers do, middle-level managers pay more attention to promotion opportunities than high-level managers do, and lower-level managers attach more importance to retirement plans than high-level managers do [32]. The study based on a person-centered approach assumes the heterogeneous population of a sample [17,19], and demographic variables can be used as covariates to construct mixed regression models that predict similar individuals within each profile [21]. The above literature shows that individuals with different demographic variables perceive different levels of satisfaction with the various offered forms of total reward. We aim to assess how demographic variables determine whether similar individuals belong to a particular profile. Therefore, we propose the following RQ: RQ 2. How do demographic variables involving gender, age, education, and position level influence membership in each profile of TRS? Or are similar individuals with specific demographic variables more likely to share a specific profile? 2.3. TRS profiles and work performance Work performance indicates the observable behaviors demonstrating that employees are conducive to the organization or orga­ nizational goals [33]. Task and contextual performance are widely recognized types of work performance. Task performance can be defined as those behaviors directly supporting the completion of job tasks and job responsibilities. In contrast, contextual performance refers to those behaviors supporting a broader social, organizational, and psychological context in which job tasks can be attained [34]. Social exchange theory, which combines perspectives from psychology, management, and sociology, is prevalently used to un­ derstand organizational behaviors [35,36]. Blau [37] held that exchange activities bring rewards that have a dominant influence on human behavior, and the rewards obtained by interacting with others are called social rewards, including both intrinsic and extrinsic rewards. Social exchange can be defined as voluntary behavior that is stimulated by the rewards that people expect and receive from interacting with other people and varies in fundamental ways from economic exchange. Economic exchange involves exact quantities as defined by a formal contract and are transacted to ensure that both parties perform specific responsibilities [36]. Social exchange, by contrast, entails unspecified obligations, so there is no contractual guarantee. Because certain job tasks that employees are responsible for are not all specified in advance, the exchange between employees and their employing organization is somewhat closer to social exchange [37]. According to these views, while an organization offers a total reward to its employees, employees need to invest their time, energy, skills, and other input costs to achieve the work performance required by organizations as returns to their organization. The employment relationship established between organizations and employees through a total reward system can be regarded as an exchange relationship that includes both social and economic exchange [38,39,40]. Social exchange relationships can be classified into two types, given the causal perspective of forming exchange relationships [35, 41]. One is the positive hedonic value model. When positive initial behaviors benefit a target, positive exchange relationships occur. Then, targets will tend to respond to positive initiating actions in kind with more positive and/or fewer negative behaviors. The other is the negative hedonic value model. When negative initial behaviors harm a target, negative exchange relationships occur. Then, targets tend to respond to negative initiating actions with more negative behaviors [35,42]. Based on the positive hedonic value model, as a positive initiator, a good exchange relationship arises when an organization offers a total reward that its employees perceive as satisfactory. In this context, employees are likely to reply with high work performance [43]. Employees tend to not only strive to improve their task performance but also to undertake more contextual performance, such as teamwork and maintaining the organi­ zational reputation. Conversely, the negative hedonic value model also holds. As a result, different levels of TRS have different effects on work performance. Previous research has mainly investigated the separate effect of each TRS dimension on work performance from the perspective of a variable-centered study. Nevertheless, these research conclusions have been inconsistent to date. A meta-analysis suggested that pay level satisfaction has a weak positive impact on work performance [44]. Moreover, some studies have suggested that pay satisfaction and benefit satisfaction significantly enhance task or contextual performance [13,14,45]. Others found that compensation (pay) satisfaction or benefit (material reward) satisfaction had no significant effect on task or contextual performance [3,5,46,47], and De Gieter and Hofmans [5] found that financial reward satisfaction significantly negatively impacted task performance. Furthermore, there is evidence that satisfaction with not only one’s work-family balance [3,48,49] but also performance and recognition (psy­ chological reward) [3,50,51] significantly positively impact work performance or task performance. However, other studies have suggested that satisfaction with one’s psychological reward, development and career opportunities has no significant effect on one’s task performance [3,5] or contextual performance [47] and even significantly negatively influences one’s task performance [47]. No studies have yet examined the relation of different TRS profiles to work performance using LPA. A study using cluster-wise regression found no relationship between different subgroups of TRS and task performance [5]. Consequently, it is difficult for our study to assume how the profiles of TRS influence work performance. However, the existing conclusions also indicate that the five dimensions of TRS might have different effects on work performance to a certain extent. Individuals’ experiences of satisfaction with the five types of total reward may vary, which could generate interactions among the five dimensions of TRS. We aim to discover the complex mechanism between the interaction of each of these five dimensions and work performance. Therefore, we propose the following RQs: RQ 3. Do TRS profiles show (predict) the different levels of work performance?, RQ 3-1: Do TRS profiles show (predict) the different levels of task performance?, RQ 3-2: Do TRS profiles show (predict) the different levels of contextual performance? 3 Heliyon 9 (2023) e14154 C. Li et al. Following the work of Wang and Hanges [20], Meyer and Morin [21], and Howard and Hoffman [16], we establish the mixed model of TRS profiles and covariates (predictors, or outcomes), as shown in Fig. 1, in which demographic variables are predictors of TRS profiles and work performance is the outcome variable of TRS profiles. 3. Study 1 3.1. Method of study 1 3.1.1. Sample and data collection In Study 1, with the help of a questionnaire survey company, we randomly sampled employees from several retail formats (e.g., department stores, convenience stores, specialty stores, supermarkets, and B2C e-commerce) in the eastern and central cities of China. The pre-survey including 186 valid questionnaires showed that the reliability of each modified variable scale was acceptable. In LPA, large sample sizes (>500) are generally considered to be the best fit for mixed models [16], but smaller profiles that lack practical significance may be identified using substantial sample sizes (>1000) [21]. According to the above requirement of LPA samples, we conducted the formal questionnaire by conducting online surveys in February 2019 and randomly sampled 511 questionnaires with the help of the same questionnaire survey company as that which assisted us with the pre-survey. A period of 2 s is the minimum time needed to answer each item under conservative estimation [52]. Therefore, we considered that a participant who completed our questionnaire within 1 min had provided poor quality data and excluded them. Finally, there were 429 valid questionnaires, with an effective rate of 83.95%. The samples included 45.5% male and 54.5% female. A total of 5.1% were less than 23 years old, 38.5% were 23 to 29 years old, 40.1% were 30 to 39 years old, and 16.3% were 40 years old or above. Regarding education, technical secondary or high school accounted for 31.0%, junior college accounted for 37.5%, and bachelor’s degree accounted for 31.5%. Regarding position level, 56.2% were ordinary employees, 35.4% were from low management (e.g., team leaders), and 8.4% were from middle management (e.g., department managers/store managers). Beijing Technology and Business University granted ethical approval of our research. Par­ ticipants were assured of confidentiality and anonymity in the informed consent form and in each questionnaire, and we promised to use all survey data for our study only. 3.1.2. Variable measurement TRS was measured with a modified scale using five dimensions taken from De Gieter and Hofmans [5], Payne et al. [22], and Li and Yin [3]. Compensation satisfaction (CS) was measured by a 4-item subscale (e.g., "My current base pay"; α = 0.886). Benefit satisfaction (BS) was measured by a 4-item subscale (e.g., "Public insurance and housing funds contributed by my company"; α = 0.706). Work-life balance satisfaction (WBS) was measured by a 4-item subscale (e.g., "My company facilitates employees caring for their families"; α = 0.742). Performance and recognition satisfaction (PRS) was measured by a 3-item subscale (e.g., "My supervisor communicates regarding my performance"; α = 0.702). Development and career opportunity satisfaction (DOS) was measured by a 4-item subscale (e. g., "Promotion opportunities offered by my company"; α = 0.728). A Likert 5-point scale was applied to score all items (1 = "very dissatisfied"; 5 = "very satisfied"). The Cronbach’s α of the total scale was 0.817. 3.1.3. Statistical analysis strategy Study 1 used LPA in Mplus 7.4 to identify different profiles. LPA is a typical analytical method for person-centered approaches. Compared with cluster-wise regression, LPA is more conducive to exploring the relationship between variables in each profile [20]. To detect the optimal profile model, we report six indicators: the Akaike information criterion (AIC), the Bayesian information criterion (BIC), the sample-size adjusted BIC (ABIC), the Lo-Mendell-Rubin likelihood ratio test (LMR), the bootstrapped likelihood ratio test (BLRT), and entropy [53,54]. The profile model fits better when the values of AIC, BIC, and ABIC are lower. LMR and BLRT are used to compare a chi-variance between a k-profile model and a k-1-profile model. It is better to use a k-profile model if the p values of LMR and BLRT are significant; otherwise, it is better to use a k-1-profile model. The entropy value (0–1) represents a classification error in a profile model, where a value closer to 1 indicates that the classification error of the model is small. Choosing the right profile structure requires the consideration of the profiles’ theoretical significance [53], and each profile should have a sample size of at least 5% of the total number of samples [55]. Fig. 1. The mixture model. 4 Heliyon 9 (2023) e14154 C. Li et al. 3.2. Results of study 1 3.2.1. Descriptive statistics and correlations Table 1 exhibits descriptive statistics and bivariate correlations of the research variables. The mean for each of the five TRS di­ mensions was just above 3, indicating that employees in the sample were satisfied with the five elements of total reward. 3.2.2. LPA In response to RQ 1, Study 1 implemented LPA in Mplus 7.4 to identify the different profiles. Table 2 presents multiple fit indicators to test possible profile models. From the one-profile to five-profile model, the AIC, BIC, and ABIC values gradually declined, which indicated the model fit’s improvement; each entropy value exceeded 0.80, indicating that the model was accurate. The LMR p value of the four-profile model was significant (p < 0.001), showing that it significantly outperformed the three-profile model. The LMR p value of the five-profile model was not significant (p = 0.7055 > 0.05), showing that it did not significantly outperform the four-profile model, and the model maximum is five profiles. In conclusion, the four-profile model outperformed the others, and was thus cho­ sen as study 1’s model. Table 3 presents the five-dimensional means of TRS for the four-profile model, and their standardized mean plots are displayed in Fig. 2. Table 3 and Fig. 2 reflect distinct quantitative and qualitative differences in the four profiles, which can be labeled as follows: (a) dissatisfied profile (DS), (b) development and career opportunities satisfied-dominant profile (DOS-dominant), (c) work-life balance satisfied-dominant profile (WLS-dominant), and (d) compensation satisfied-dominant profile (CS-dominant). Employees who belonged to DS (N = 53; 12.4%) experienced dissatisfaction with all five dimensions, and the mean of each dimension was just above 2. Em­ ployees who belonged to the DOS-dominant profile (N = 131; 30.5%) experienced satisfaction with the available development and career opportunities (M = 3.82) and neither satisfaction nor dissatisfaction with the remaining four dimensions, of which the means were just above 3. Employees who belonged to the WLS-dominant profile (N = 117; 27.3%) experienced satisfaction with work-life balance (M = 4.10) and neither satisfaction nor dissatisfaction with the remaining four dimensions, of which the means were approximately 3. Employees who belonged to the CS-dominant profile (N = 128; 29.8%) experienced satisfaction with compensation (M = 4.22) and neither satisfaction nor dissatisfaction with the remaining four dimensions, of which the means were approximately 3. Thereby, these findings prove the importance of RQ 1, suggesting that four qualitatively and quantitatively differentiated profiles of TRS exist. In other words, there are four distinct subpopulations of employees in TRS. 4. Study 2 4.1. Method of study 2 4.1.1. Sample and data collection In Study 2, with the HR Department’s assistance, we invited 1980 employees of 61 stores of a supermarket in Beijing to participate in a formal online survey in April 2019. According to the requirements of LPA samples [16,21] and based on the number of partici­ pants, we randomly sampled approximately 49% of the total participants in each store to ensure that the total sample included all stores and that the participants in each store were equally likely to be sampled. We sampled a total of 974 participants and asked them to fill out the questionnaire. We explained the purpose of our investigation to satisfy their doubts in advance, emailed each participant the survey link, and restricted each device to one submission. Finally, we excluded 89 participants who completed the questionnaire in less than 90 s, so there was a final total of 885 valid questionnaires (90.9% of the valid rate). The final samples included 40.6% males and 59.4% females. A total of 18.9% were less than 23 years old, 25.1% were from 23 to 29 years old, 36.8% were from 30 to 39 years old, and 19.2% were 40 years old or above. Regarding education, technical secondary school or high school accounted for 47.1%, junior college accounted for 35.2%, and bachelor’s degree accounted for 17.7%. Regarding position level, 43.1% were ordinary employees, 36.3% were from low management (e.g., team leaders), and 20.6% were from middle management (e.g., department managers/store managers). Beijing Technology and Business University granted ethical approval for our research. Participants were assured of confidentiality and anonymity in the informed consent form and in each questionnaire, and we promised to use all survey data for our study only. Table 1 Descriptive analysis and correlations among variables of study 1. CS BS WLS PRS DOS MEAN SD CS BS WLS PRS DOS 3.05 2.99 3.10 2.92 2.92 1.03 0.74 0.87 0.81 0.83 1 0.473** − 0.118* 0.007 − 0.045 1 0.226** 0.271** 0.400** 1 0.596** 0.311** 1 0.471** 1 Note: *p < 0.05, **p < 0.01; SD, standard deviation; CS, compensation satisfaction; BS, benefit satisfaction; WLS, work-life balance satisfaction; PRS, performance and recognition satisfaction; DOS, development and career opportunities satisfaction. 5 Heliyon 9 (2023) e14154 C. Li et al. Table 2 Model fit indicators for LPA of study 1. No. of profiles AIC BIC ABIC Entropy p for LMR p for BLRT 1 2 3 4 5 21915.900 20806.251 19914.616 19196.603 19055.417 22053.989 21017.447 20198.918 19554.011 19485.931 21946.094 20852.430 19976.780 19274.751 19149.550 0.896 0.950 0.952 0.935 <0.001 0.0025 <0.001 0.7055 <0.001 <0.001 <0.001 <0.001 Table 3 The five-dimensional means of TRS for the four latent profiles of study 1. CS BS WLS PRS DOS DS (n = 53; 12.4%) DOS-dominant (n = 131; 30.5%) WLS-dominant (n = 117; 27.3%) CS-dominant (n = 128; 29.8%) 1.42 1.82 1.94 1.99 2.16 3.14 3.44 3.18 3.23 3.82 2.42 2.83 4.10 3.43 2.87 4.22 3.16 2.58 2.51 2.35 Fig. 2. Standardized means of TRS by four profiles of study 1. Note: The mean of a dimension score in a profile is 0, and the standard deviation is 1. A score closer to 0 shows that the individuals’ dimension satisfaction level in the profile is closer to the overall sample’s mean for that dimension. 4.1.2. Variable measurement TRS was measured as in Study 1. The Cronbach’s α of the CS, BS, WLS, PRS, and DOS subscales was 0.864, 0.920, 0.849, 0.821, and 0.873, respectively. The Cronbach’s α of the total scale was 0.956. Work performance was measured with a modified scale of two dimensions taken from Motowidlo and Van Scotter [34] and Yu [56]. Task performance (TP) was measured by a 4-item subscale (e.g., "I am one of the best employees in the entire department"; α = 0.841). Contextual performance (CP) was measured by a 10-item subscale (e.g., "I can always offer to help my colleagues if they need it"; α = 0.904). A Likert 5-point scale was applied to score all items (1 = "strongly disagree "; 5 = "strongly agree "). The Cronbach’s α of the total scale is 0.923. Demographic variables might be related to profiles and work performance. These included gender, age, education, and position level as antecedents to test the demographic characteristics that predict each profile of TRS. 4.1.3. Statistical analysis strategy Study 2 implemented LPA and BCH commands in Mplus 7.4 and performed multinomial logistic regression (MLR) analysis in SPSS 23.0. First, Study 2 determined different profiles by applying LPA, as in Study 1. Second, Study 2 employed MLR to test the profiles’ predictability by demographic variables (predictors). The final model including all predictors was significant compared to the intercept-only model, indicating that the predictors have explanatory power. The regression coefficient was adopted to evaluate whether the rise of predictors would lead to an individual’s higher probability of belonging to a profile other than the reference profile [57]. The odds ratio (OR) was a specific value used to reflect a change in probability. Age was used as a continuous variable. The other demographic variables are categorical variables, and were coded into dummy variables such as the following: gender, 1 = female, and 0 = male; education, 1 = less educated (technical secondary school or high school), and 0 = highly educated (junior college and bachelor’s degree); position level, 1 = ordinary employees, and 0 = low and middle management (e.g., team leaders, department managers/store managers). Third, Study 2 applied the BCH command to test the relationship between profiles and outcome variables [58] so that the profiles 6 Heliyon 9 (2023) e14154 C. Li et al. do not shift once BCH is employed. First, the BCH command uses the two covariates of task and contextual performance as the distal outcomes for comparisons between profiles. Then, the BCH command uses Wald’s chi-square test to generate an overall test and pairwise comparisons between profiles of covariates [59]. 4.2. Results of study 2 4.2.1. Descriptive statistics and correlations Table 4 exhibits the descriptive statistics and bivariate correlations of the research variables. Each mean for the five dimensions of TRS was just above 3, indicating that employees in the sample were satisfied with the five elements of total reward. Each mean for task and contextual performance was also just above 3, indicating that work performance was at a medium level. The correlations showed that compensation satisfaction was not significantly related to task and contextual performance, while the remaining four dimensions of TRS were all significantly related to task and contextual performance. 4.2.2. LPA In response to RQ 1, Study 2 implemented LPA in Mplus 7.4 to test the profiles of Study 1. Table 5 presents multiple fit indicators to test the possible profile models. From the one-profile to five-profile model, the values of AIC, BIC, and ABIC gradually declined, indicating the model fit’s improvement; each entropy value exceeded 0.80, indicating that the model was accurate. The LMR p value of the four-profile model was significant (p < 0.001), showing that it significantly outperformed the three-profile model. The LMR p value of the five-profile model was not significant (p = 0.1758 > 0.05), showing that it did not significantly outperform the four-profile model, and the model has a maximum of five profiles. In conclusion, the four-profile model outperformed the others, and was cho­ sen as study 2’s model. Table 6 presents the five-dimensional means of TRS for the four-profile model, and their standardized mean plots are displayed in Fig. 3. Table 6 and Fig. 3 reflect distinct quantitative and qualitative differences among the four profiles, which can be labeled as follows: (a) DS, (b) DOS-dominant, (c) WLS-dominant, and (d) CS-dominant. Employees who belonged to DS (N = 88; 10.0%) experienced dissatisfaction with all five dimensions, and the mean of each dimension was just above 2. Employees who belonged to the DOS-dominant profile (N = 115; 13.0%) experienced satisfaction with development and career opportunities (M = 4.28) and neither satisfaction nor dissatisfaction with the remaining four dimensions, of which the means were just above 3. Employees who belonged to the WLS-dominant profile (N = 282; 31.9%) experienced satisfaction with work-life balance (M = 4.22) and neither satisfaction nor dissatisfaction with the remaining four dimensions, of which the means were approximately 3. Employees who belonged to the CSdominant profile (N = 400; 45.1%) experienced satisfaction with compensation (M = 4.00) and neither satisfaction nor dissatisfac­ tion with the remaining four dimensions, of which the means were approximately 3. These findings again prove the importance of RQ 1, suggesting that four qualitatively and quantitatively differentiated profiles of TRS exist. In other words, there are four distinct subpopulations of employees in TRS. 4.2.3. Predictors of profile membership In response to RQ 2, Study 2 performed MLR analyses to verify how demographic characteristics predicted TRS profiles. The formula was organized as ( ) Pi logit = α + β1 Age + β2 Education + β3 Gender + β4 Position level, Pj where Pi is the probability of profile i, Pj is the probability of reference profile j, logit(Pi /Pj ) is the logit function of the chosen two profiles, and β1 , …, β4 are the coefficients of the responding predictors. The model with demographic variables (− 2 log likelihood = 413.474, c2 = 283.423, df = 12, p < 0.001) had a significantly lower chi-square value (− 2 log likelihood = 696.897), which indicated that demographic variables such as gender, age, education, and position level were statistically significant. Table 7 provides the MLR results for these predictors’ effects on profile membership and demographic variables, compared across profiles. For female employees, the probability of belonging to DS was significantly higher than that of belonging to the DOS-dominant profile (B = 1.454, p < 0.001, OR = 4.280), the WLS-dominant profile (B = 0.702), p = 0.020, OR = 2.018) or the CS-dominant Table 4 Descriptive analysis and correlations among the variables of study 2. CS BS WLS PRS DOS TP CP MEAN SD CS BS WLS PRS DOS TP CP 3.27 3.00 3.33 3.00 3.09 3.23 3.32 0.87 0.89 1.02 0.86 0.91 0.60 0.60 1 0.26** − 0.15** 0.18** 0.10** 0.03 0.05 1 0.14** 0.28** 0.34** 0.18** 0.20** 1 0.31** 0.21** 0.31** 0.39** 1 0.32** 0.22** 0.29** 1 0.25** 0.21** 1 0.68** 1 Note: **p < 0.01. 7 Heliyon 9 (2023) e14154 C. Li et al. Table 5 Model fit indicators for LPA of study 2. No. of profiles AIC BIC ABIC Entropy p for LMR p for BLRT 1 2 3 4 5 52590.354 42260.916 38193.706 37184.76 36326.727 52772.206 42538.48 38566.982 37653.747 36891.427 52651.526 42354.284 38319.27 37342.519 36516.683 0.991 1 0.954 0.962 0.0004 0.0004 <0.001 0.1758 <0.001 <0.001 <0.001 <0.001 Table 6 The five-dimensional means of TRS for the four latent profiles of study 2. CS BS WLS PRS DOS DS (n = 88; 10.0%) DOS-dominant (n = 115; 13.0%) WLS-dominant (n = 282; 31.9%) CS-dominant (n = 400; 45.1%) 2.19 2.13 2.02 2.08 2.26 3.21 3.52 3.19 3.24 4.28 2.60 2.92 4.22 3.15 3.00 4.01 3.10 3.03 3.03 2.99 Fig. 3. Standardized means of TRS by four profiles of study 2. Note: The mean of a dimension score in a profile is 0, and the standard deviation is 1. A score closer to 0 shows that the individuals’ dimension satisfaction level in the profile is closer to the overall sample’s mean for that dimension. Table 7 MLR for the predictors’ effects on profile membership. DS vs. DOS-dominant Gender Age Education Position level DS vs. WLS-dominant OR Coefficient (SE) OR Coefficient (SE) OR 1.454 (0.357) *** − 1.825 (0.204) *** 1.851 (0.356) *** 2.958 (0.412) *** 4.280 0.161 6.363 19.255 0.702 (0.301) * − 1.116 (0.166) *** 0.532 (0.277) 1.136 (0.308) *** 2.018 0.328 1.703 3.113 1.037 (0.301) ** − 1.398 (0.168) *** 0.805 (0.279) ** 1.610 (0.308) *** 2.822 0.247 2.238 5.004 DOS-dominant vs. WLS-dominant Gender Age Education Position level DS vs. CS-dominant Coefficient (SE) DOS-dominant vs. CS-dominant WLS-dominant vs. CS-dominant Coefficient (SE) OR Coefficient (SE) OR Coefficient (SE) OR − 0.752 (0.243) ** 0.709 (0.138) *** − 1.318 (0.266) *** − 1.822 (0.311) *** 0.472 2.032 0.268 0.162 − 0.416 (0.224) 0.428 (0.131) ** − 1.045 (0.251) ** − 1.347 (0.301) *** 0.659 1.533 0.352 0.260 0.335 (0.163) * − 0.282 (0.083) ** 0.273 (0.160) 0.475 (0.160) ** 1.398 0.754 1.314 1.607 Note: *p < 0.05, **p < 0.01, ***p < 0.001; SE, standard error; OR: Odds Ratio. The coefficients and OR indicate the predictors’ effects on the likelihood of membership in the former profile relative to the latter. profile (B = 1.037, p = 0.001, OR = 2.822). The probability of belonging to the DOS-dominant profile was significantly lower than that of belonging to the WLS-dominant profile (B = − 0.752, p = 0.002, OR = 0.472). The probability of belonging to the WLS-dominant profile was significantly higher than that of belonging to the CS-dominant profile (B = 0.335, p = 0.040, OR = 1.398). There was no significant difference between the probability of belonging to the DOS-dominant profile and belonging to the CS-dominant profile. In 8 Heliyon 9 (2023) e14154 C. Li et al. summary, compared with male employees, female employees were most likely to belong to the DS profile, followed by the WLSdominant, DOS-dominant, and CS-dominant profiles, in order. For older employees, the probability of belonging to the DS profile was significantly lower than that of belonging to the DOSdominant profile (B = − 1.825, p < 0.001, OR = 0.161), the WLS-dominant profile (B = − 1.116, p < 0.001, OR = 0.328) or the CS-dominant profile (B = 0–1.398, p < 0.001, OR = 0.247). The probability of belonging to the DOS-dominant profile was significantly higher than that of belonging to the WLS-dominant profile (B = 0.709, p < 0.001, OR = 2.032) or the CS-dominant profile (B = 0.428, p = 0.001, OR = 1.533). The probability of belonging to the WLS-dominant profile was significantly lower than that of belonging to the CS-dominant profile (B = − 0.282, p = 0.001, OR = 0.754). In summary, older employees most likely belonged to the DOS-dominant profile, followed by the CS-dominant, WLS-dominant, and DS profiles, in order. For less-educated employees, the probability of belonging to the DS profile was significantly higher than that of belonging to the DOS-dominant profile (B = 1.851, p < 0.001, OR = 6.363) or the CS-dominant profile (B = − 0.897, p = 0.001, OR = 0.408). The probability of belonging to the DOS-dominant profile was significantly lower than that of belonging to the WLS-dominant profile (B = 0.805, p = 0.004, OR = 2.238) or the CS-dominant profile (B = − 1.045, p < 0.001, OR = 0.352) profiles. In summary, compared with highly educated employees, less-educated employees most likely belonged to the DS or WLS-dominant profile, followed by the CSdominant and DOS-dominant profiles, in order. For ordinary employees, the probability of belonging to the DS profile was significantly higher than that of belonging to the DOSdominant profile (B = 2.958, p < 0.001, OR = 19.255), the WLS-dominant profile (B = 1.136, p < 0.001, OR = 3.113) or the CSdominant profile (B = 1.610, p < 0.001, OR = 5.004). The probability of belonging to the DOS-dominant profile was significantly lower than that of belonging to the WLS-dominant profile (B = − 1.822, p < 0.001, OR = 0.162) or the CS-dominant profile (B = − 1.347, p < 0.001, OR = 0.260). The probability of belonging to the WLS-dominant profile was significantly higher than that of belonging to the CS-dominant profile (B = 0.475, p = 0.003, OR = 1.607). In summary, compared with low and middle management, ordinary employees most likely belonged to the DS profile, followed by the WLS-dominant, CS-dominant, and DOS-dominant profiles, in order. In conclusion, demographic characteristics differentiate the difference TRS profiles. The highest likelihood of membership in the DS profile belonged to female, less-educated, youngest or ordinary employees. The highest likelihood of membership in the DOSdominant profile belonged to male, highly educated, older employees or to low- and middle-level management. The highest likeli­ hood of membership in the WLS-dominant profile belonged to less-educated employees, next came female, younger, or ordinary employees. The highest likelihood of membership in the CS-dominant profile belonged to male employees, followed by less-educated, older, or ordinary employees. These results confirm the importance of RQ 2, indicating that demographic variables involving gender, age, education, and position level affect each the likelihood of membership in each profile of TRS. Alternatively, similar individuals with specific demographic variables are more likely to share a specific profile. 4.2.4. Outcome variable analysis of profiles In response to RQ 3, Study 2 used the BCH command [58] to evaluate how each of the four profiles influence work performance. The results are shown in Table 8. Task and contextual performance were significantly different in the four TRS profiles (χ2 = 128.564, p < 0.001; χ2 = 133.648, p < 0.001). In the DS, DOS-dominant, WLS-dominant, and CS-dominant profiles, the mean values of task performance were M = 2.136, M = 3.069, M = 3.627, and M = 2.858, respectively; meanwhile, the mean values of contextual performance were M = 2.091, M = 3.175, M = 3.453, and M = 2.906, respectively. Employees in the WLS-dominant profile presented significantly higher task and contextual performance than those in the other three profiles. Employees in the DOS-dominant profile presented significantly lower task and contextual performance than those in the WLS-dominant profile, but significantly higher performance than those in the CS-dominant and DS profiles. Employees in the CS-dominant profile presented significantly lower task and contextual performance than those in the WLS-dominant and DOS-dominant profiles but showed significantly higher performance than those in the DS profile. Taken together, the WLS-dominant profile was linked with the highest level of task and contextual performance, followed by the DOS-dominant, CSdominant, and finally, the DS profiles. Combined, these results confirm the importance of RQ 3-1, RQ 3-2, and RQ 3, illustrating that the each of the four TRS profiles predict different levels of task and contextual performance, i.e., different levels of work performance. Table 8 Outcome means and pairwise comparisons between profiles. Profile means DS TP 2.136 DOSdominant 3.069 CP 2.091 3.175 Profile comparisons Differences between profiles WLSdominant 3.627 CSdominant 2.858 1 vs. 2 1 vs. 3 1 vs. 4 2 vs. 3 2 vs. 4 3 vs. 4 *** *** *** *** ** *** χ2 = 128.564; 3.453 2.906 *** *** *** * ** *** χ2 = 133.648; Note: *p < 0.05, **p < 0.01, ***p < 0.001.1, DS; 2, DOS-dominant; 3, WLS-dominant; 4, CS-dominant. 9 3 > 2>4 > 1 3 > 2>4 > 1 Heliyon 9 (2023) e14154 C. Li et al. 4.2.5. Supplemental analysis using a variable-centered approach To further exhibit the unique value of introducing a person-centered approach, Study 2 tested the impact of TRS on work per­ formance by applying hierarchical regression analysis to an overall sample. The results are shown in Table 9. For task performance, satisfaction with one’s work-life balance, performance and recognition, and development and career opportunities had significant positive predictive effects, while satisfaction with compensation and benefit had no significant predictive effect. For contextual performance, satisfaction with benefit, work-life balance, and performance and recognition had significant positive predictive effects, while satisfaction with compensation and development and career opportunities had no significant predictive effect. These results only demonstrate that the effect of each dimension of TRS on work performance is independent. Therefore, by assuming a homogeneous sample population, the variable-centered study could not detect the different combinations of TRS di­ mensions or reveal how the profiles influence work performance from the perspective of individual differences. 5. Discussion We introduced a person-centered approach and performed an LPA to discover TRS profiles with the use of two samples. Based on constructing mixture models of profiles, we showed the predictability of demographic variables on profile similarity and the differ­ ential effects of TRS profiles on work performance. Our exploratory findings confirm the importance of RQ 1, RQ 2, and RQ 3 (RQ 3-1, RQ 3-2). Our study determined that there are four TRS profiles (subpopulations) and they differ quantitatively and qualitatively. Employees of DS subpopulation experienced dissatisfaction with all five dimensions. Employees of the DOS-dominant, WLS-dominant, and CSdominant subpopulations respectively experienced satisfaction with development and career opportunities, work-life balance, and compensation, while they experienced neither satisfaction nor dissatisfaction with the remaining four dimensions. Our result supports the hypothesis of sample heterogeneity in the person-centered study and conforms to the LPA standard [17,21,24,25]. Compared with the results of Hofmans et al. [19] and De Gieter and Hofmans [5] that use traditional cluster-wise analysis, LPA based on probabilistic classification can more accurately identify the classification of subpopulations [20]. Therefore, our study captured the unobserved heterogeneity in the TRS population, while previous variable-centered studies found it difficult to identify such individual differences. Our study suggested that similar individuals with specific demographic variables are more likely to share a specific profile of TRS. The DS profile was most likely to consist of female, less-educated, youngest, or ordinary employees. The DOS-dominant profile was most likely to consist of male, highly educated, older employees, or low- and middle-level management. The WLS-dominant profile was most likely to consist of less-educated employees, followed by female, younger, or ordinary employees. The CS-dominant profile was more likely to consist of male employees who were less-educated, followed by older, or low- and middle-level management. Our result confirms a study using a person-centered approach can use demographic variables as predictors to more richly describe the nature of each profile [21]. In contrast, previous variable-centered studies have shown that individuals with different demographic charac­ teristics attach distinct value to the types of total rewards [11,28,29,30,31,32]. However, in those studies, demographic variables are used as control variables to reduce their impact on the relationships between other research variables but are usually not reported as study results. Therefore, our study verified that demographic variables are sensitive to complex combinations among the dimensions of TRS. Our study uncovered four subpopulations that differentially predict work performance. On one hand, our results confirm the core view of social exchange theory. Based on social exchange theory, social exchanges require openness and trigger adaptability and trust, whereas economic exchanges tend to be based on explicit exchange conditions and produce less trust and more supervision [36]. Work-life balance and development and career opportunities are more likely to promote social exchange than compensation and benefit [37]. Therefore, according to the positive-negative hedonic value model [35,41,42], employees in the WLS-dominant and DOS-dominant profiles exhibited a higher work performance than CS-dominant employees, while employees in the DS profile exhibited the lowest work performance. On the other hand, compared with the study of De Gieter and Hofmans [5], our study more accurately reveals the differences in the impact of TRS on work performance among employee subgroups because LPA is superior to traditional cluster analysis. Moreover, a supplemental analysis of our study demonstrated that certain dimensions of TRS have a significant positive effect or no significant Table 9 Results of regression analysis of the overall sample predicting work performance. TP Gender Age Education Position level CS BS WLS PRS DOS CP В SE P Value В SE P Value 0.027 0.108*** 0.064* − 0.001 − 0.005 0.037 0.143*** 0.059* 0.065** 0.039 0.020 0.026 0.017 0.023 0.024 0.020 0.024 0.023 0.485 0.000 0.014 0.944 0.838 0.129 0.000 0.015 0.006 0.032 0.096*** 0.058* 0.008 0.012 0.051* 0.184*** 0.097*** 0.013 0.037 0.019 0.024 0.016 0.022 0.023 0.019 0.023 0.022 0.382 0.000 0.018 0.615 0.593 0.027 0.000 0.000 0.549 Note: *p < 0.05, **p < 0.01, ***p < 0.001. 10 Heliyon 9 (2023) e14154 C. Li et al. effect on work performance, which is similar to the findings of previous variable-centered studies [3,5,13,14,44,45,46,47,48,49,50, 51]. All of these findings illustrate the limitations of exploring the independent effects of various dimensions of TRS on work per­ formance. However, based on the person-centered approach, our findings suggest that combinations of various TRS dimensions have a different impact on work performance from the perspective of individual differences rather than from that of a single dimension. Thus, our results can help to overcome the contradictory and difficult theoretical explanation of previous findings based on the variable-centered approach [21,60]. 6. Conclusion Our findings demonstrated that there are four profiles or subpopulations of TRS and that they quantitatively and qualitatively differed. DS varied quantitatively (in level), whereas the DOS-dominant, WLS-dominant, and CS-dominant profiles varied qualitatively (in shape). Moreover, demographic variables, including gender, age, education, and position level, significantly predicted TRS profile membership. Finally, TRS profiles exhibited different levels of work performance, that is, different levels of task and contextual performance. The WLS-dominant profile displayed the highest task and contextual performance, followed by the DOS-dominant, CSdominant, and DS profiles. 6.1. Theoretical contributions Based on a person-centered approach and by conducting LPA, our exploratory study examined TRS profiles and their incentive effects, which fills the gap in previous research based on the use of a variable-centered approach and traditional cluster-wise analysis. First, the four profiles or subpopulations of TRS are more accurate and consistent with reality, enriching the literature on TRS research. Second, similar individuals with specific demographic variables were more likely to share a specific profile, which is an essential complement to the findings of previous variable-centered studies. Third, the relationship between TRS profiles and work performance offers new insight into the incentive effect of total rewards from the perspective of individual differences, which promotes theoretical research in this field. 6.2. Practical implications When using a person-centered approach, one needs to prove that the profiles not only are of theoretical significance but also have practical value [57]. Our study sampled employees of retail enterprises suffering from labor costs. Therefore, our results offer theo­ retical guidance for organizations with regard to customizing the policies of a total reward system, with the aim of achieving a breakthrough in incentive management given the difficulties of the current financial situation generally faced by organizations due to the COVID-19 pandemic. Our study supports the idea of classification management, which means fundamentally switching between analytical mindsets and in turn having an important impact on the design of management policies [17,61]. Thereby, organizations need to transform the concept of management into that of classification management for designing the total reward system. The various TRS subpopulations should be considered in the policies of total reward to motivate target employees to improve work performance. Regarding the en­ terprises similar to the sample of this study, a differentiated and classified total reward system should be customized and implemented. For the DS subpopulation, an enterprise should make improvements to the five types of total reward. For the WLS-dominant sub­ population, an enterprise should provide a more robust work-life balance policy. For the DOS-dominant subpopulation, an enterprise should furnish more career development opportunities. Finally, for the CS-dominant subpopulation, an enterprise should offer better monetary rewards. 6.3. Limitations and future research First, our sample is taken from employees of the retail industry in China, which limits the applicability of the findings in other countries and industries. The profile classification may vary from sample to sample, so future studies should use samples from different countries (e.g., Europe, North America) and industries (e.g., information industry) to test the consistency of TRS profiles. Second, this study only used cross-sectional data for testing, which cannot assess the stability of potential profiles and is not conducive to reflecting the causal relationship between profiles and work performance. Longitudinal data and latent transition analysis (LTA) should be employed to assess the stability of latent profiles at different points in time and whether latent profiles and outcome variables have a true causal relationship [16,20]. Therefore, future research should investigate the development and stability of TRS profiles based on longitudinal data to infer whether TRS profiles and work performance have a causal relation. Third, all variables were measured by the self-reported ratings of employees, which may result in common method bias. The distortion of a statistical analysis produced by common method bias is less for studies using LPA than for variable-centered studies [21]. However, the possible impact on this study of common method bias cannot be ruled out. Future research should consider employee-supervisor dyads in which superiors evaluate the work performance of their subordinates. 11 Heliyon 9 (2023) e14154 C. Li et al. Declarations Author contribution statement Chunling Li: Conceived and designed the experiments; Performed the experiments; Analyzed and interpreted the data; Contributed reagents, materials, analysis tools or data; Wrote the paper. Xueyun Duan: Performed the experiments; Analyzed and interpreted the data; Contributed reagents, materials, analysis tools or data; Wrote the paper. Xiangling Chu: Analyzed and interpreted the data; Contributed reagents, materials, analysis tools or data. Yong Qiu: Analyzed and interpreted the data; Wrote the paper. Funding statement This research was supported by the National Social Science Fund of China (Grant No. 19CGL028) and the Beijing Municipal Social Science Foundation [Grant No. 15JGB061]. The sponsors played no role in research design, collecting and analyzing data, drawing research results, preparing the manuscript, or even in publication decisions. Data availability statement Data will be provided upon request. Declaration of interests statement The authors declare no conflicts of interest. Additional information This article does not contain additional information. Appendix A. Supplementary data Supplementary data to this article can be found online at https://doi.org/10.1016/j.heliyon.2023.e14154. References [1] R.L. 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