Copyright 1991 by the American Psychological Association, Inc. 0021-9010/91/S3.00 Journal of Applied Psychology 1991, Vol. 76, No. 5, 690-697 Meta-Analytic Comparison of the Job Diagnostic Survey and Job Characteristics Inventory as Correlates of Work Satisfaction and Performance Yitzhak Fried Department of Management and Organization Sciences Wayne State University Hunter, Schmidt, and Jackson's (1982) meta-analytic procedure was used to compare the relationships of the corresponding scales of the Job Diagnostic Survey and the Job Characteristics Inventory with work satisfaction and performance. The results suggest convergence in the estimated population correlations of the alternative identity and feedback scales with both satisfaction and performance. The results further indicate similarity in the estimated relationships of the alternative autonomy scales with performance and the alternative variety scales with satisfaction. In contrast, dissimilarity was found in the estimated relationships of the alternative variety scales with performance and the alternative autonomy scales with satisfaction. The latter dissimilarity was particularly substantial. Implications of the present findings are discussed. of the relation of JDS and JCI scales with work outcomes. The search included major empirical journals that have published studies in the area of job design over the past 15 years. These journals were Academy of Management Journal, Administrative Science Quarterly, Human Relations, Journal of Applied Psychology, Journal of Management, Journal of Occupational Psychology, Journal of Organizational Behavior, Journal of Vocational Behavior, Personnel Psychology, Psychological Reports, and Organizational Behavior and Human Decision Processes. No systematic effort was made to identify unpublished studies. However, a few unpublished studies familiar to the author were examined, bringing the total number of studies reviewed to nearly 200. The search yielded a sufficient number of correlational studies to enable a comparative meta-analysis only on the relation of the JDS and JCI measures with work satisfaction and work performance. Performance data used in the meta-analysis consisted of either supervisory rating scores or hard (objective) criterion measurements provided by an organization. Different methods were used to assess performance for both types of performance data. For example, some studies reported ratings of overall performance, whereas others averaged ratings across various performance dimensions. Similarly, different measures were used to provide objective performance data (e.g., number of units completed in a given time period or number of detected errors. More detailed information on these differences is available on request). Worksatisfaction data were based on measures that assessed the degree of one's satisfaction from personal development and accomplishment at work. Hackman and Oldham's (1975) growth-satisfaction measure was also included because its underlying construct and the content of its items were very similar to those of other work-satisfaction measures (cf. Fried & Ferris, 1987; Hackman & Oldham, 1975). Of the total studies reviewed, 79 were included in the present analysis because they provided information on one or more of the following statistical indices required for the meta-analysis: (a) standard deviation of a job-characteristic scale; (b) an estimated reliability (Cronbach's alpha) of a job-characteristic scale or work outcome; and (c) a correlation coefficient of a job-characteristic scale with a focal outcome. The meta-analytic procedure used in this study requires that the sample size associated with each correlation also be recorded. Of the 79 studies, 27 provided correlation coefficients between the JDS and JCI scales with the focal outcomes (see Appendix). Three of these studies contained relevant correlation coefficients for two separate samples, bringing the total number of samples with correlational information to 30. The Job Diagnostic Survey (JDS; Hackman & Oldham, 1975) and, albeit to a lesser extent, the Job Characteristics Inventory (JCI; Sims, Szilagyi, & Keller, 1976) have served as the principal self-report measures for assessing job characteristics. To date, however, there has been a dearth of research on the convergent validity between corresponding scales of these alternative measures. For example, after a comprehensive review of the literature, I found only one study (Pierce & Dunham, 1978) that directly correlated the corresponding scales of the JDS and JCI. Moreover, there has been no attempt in the literature to compare systematically the relation of the alternative JDS and JCI scales with focal work outcomes (e.g., work satisfaction, performance). However, because a number of studies exist that have used either the JDS or JCI to explore job characteristics-outcomes relations, it is possible to use the correlations reported in these studies to conduct a comparative analysis. In the present study, the meta-analytic procedure of Hunter, Schmidt, and Jackson (1982) was used to explore the relations of the JDS and JCI scales with work satisfaction and performance. This technique was chosen over a narrative review because it accumulates findings across studies while controlling for statistical artifacts that can bias results and conclusions. Method Sample A literature search was conducted to identify studies that provided the statistical information necessary for a meta-analytic investigation The research was part of Yitzhak Fried's doctoral dissertation, which was completed at the University of Illinois at Urbana-Champaign. Preparation of this article was partially supported by a fellowship from the College of Urban, Labor & Metropolitan Affairs, Wayne State University. I acknowledge Greg Oldham, Ray Aldag, Robert Tiegs, and Margaret Padgett for their helpful comments and suggestions on an earlier version of the article. Correspondence concerning this article should be addressed to Yitzhak Fried, Department of Management and Organization Sciences, School of Business, Wayne State University, Detroit, Michigan 48202. 690 META-ANALYTIC COMPARISON OF THE JDS AND JCI Table 1 summarizes information on the characteristics of these samples. The table indicates some noticeable similarities in the characteristics of the studies that used the JDS measure and those that used the JCI measure. For example, both groups presented data from public, private, and governmental organizations, and both groups consisted primarily of field studies. Moreover, the data in both groups of studies were based on multiple job or occupation categories. Such similarities enhanced the validity of a comparative analysis regarding the findings of the two groups of studies. Procedure and Analysis The statistical artifacts considered in this study were sampling error, predictor and criterion unreliability, and range variation of the independent variables. Following Hunter et al. (1982), each artifact's distribution was based on the statistical information (i.e., correlation coefficients, sample sizes, estimated reliabilities, and standard deviations) provided by the 79 studies included in the analysis. On the basis of this information, the average observed (uncorrected) correlations and their variances were computed and then corrected for the statistical artifacts to provide estimates of true correlation coefficients and corrected variances in the reference population (see Hunter et al., 1982, pp. 73-80). Correction for range variation of a given independent variable (i.e., a job characteristic) required an estimation of the population standard deviation of this variable. In the present study, the population standard deviations of the JDS scales were estimated using the data of Oldham, Hackman, and Stepina (1979). The population standard deviations of the JCI scales were estimated using the data of Sims et al. (1976). Both of these data sets seem to be appropriate for population estimation because they provide information on job characteristics across a variety of major occupations. For each job characteristic-outcome relation, the ratio between the unexplained (residual) variance and the observed variance across the studies' correlations was computed to determine whether true variance remained after correcting for the various statistical artifacts. Following Pearlman, Schmidt, and Hunter (1980), the unexplained variance was considered to be meaningful (also referred to as true variance in the literature) if it was more than 25% of the total observed variance. Meaningful unexplained variance may be accounted for by moderating variables (see, e.g., Hunter et al., 1982). Finally, a 90% confidence interval was computed around each corrected mean correlation to determine whether this correlation is significantly different from zero. The computations of confidence intervals for the corrected mean correlations involved several steps. First, confidence intervals were generated around each uncorrected sample-size weighted mean correlation using the standard error of the mean correlation. Two different formulas were used to compute the confidence intervals depending on whether true variance was present (heterogeneous samples) or not (homogeneous samples) after corrections for the various artifacts (see, e.g., Hunter & Schmidt, 1990, ch. 9). The endpoints of each confidence interval were then corrected for measurement error and range restriction using the same formula that was used to correct the observed sample-size weighted mean correlation for these artifacts (Hunter & Schmidt, 1990, ch. 3; Hunter et al., 1982). Results and Discussion Table 2 provides descriptive statistics concerning the reported internal consistency estimates of the focal independent and dependent variables. On the basis of the median reliability value of each scale, it can be concluded that reliability estimates of the JDS and JCI scales are sufficiently high for research purposes. Nevertheless, consistent with Aldag, Barr, and Brief (1981), the median internal consistency of a focal JCI scale was 691 higher than that of the corresponding JDS scale. However, because the JDS scales consist of three items per scale and the JCI scales have between four to six items per scale, the SpearmanBrown prophecy formula was used to adjust the estimated reliabilities of each JDS scale to the number of items of the corresponding JCI scale. As expected, this analysis resulted in greater similarity of the reliability estimates of the alternative scales (see Table 2). Table 3 summarizes the relation between the alternative scales of the two measures and individual reactions. Because the corrected mean of the sample correlations represents the population estimate of the correlation between the explored job-characteristic scale and outcome, it was appropriate to make relative comparisons among the different estimates. Overall, the meta-analytic results showed similarities in six of the eight comparative relations. For these six relations, the differences between the corrected mean correlations of the focal alternative scales with satisfaction or performance ranged between .03 and .07. The two other comparisons produced differences in the estimated correlations of .12 and .33. Focusing on the specific scales, the results indicated similarity in the estimated relations of the JDS and JCI identity scales as well as the JDS and JCI feedback scales with both satisfaction and performance. That is, the estimated population correlations of the JDS and JCI identity scales with satisfaction were .32 and .39, respectively; and the estimated population correlations of these scales with performance were. 13 and. 17, respectively. The estimated population correlations of JDS and JCI job-feedback scales with satisfaction were .56 and .52, respectively; and the estimated population correlations of these scales with performance were .22 and .19, respectively. It should be noted, however, that the 90% confidence interval for the JCI feedback-performance relation ranges from —.02 to .39, indicating that the corrected mean correlation of .19 was marginally nonsignificant at the .10 level of probability. Concerning variance of the studies' correlations, no true variance was detected in the relations of the alternative scales of both identity and feedback with satisfaction. In addition, true variance was detected in the relations of the alternative scales of job feedback with performance, but was not detected in the relations of the alternative identity scales with this outcome. The construct validity of the JDS and JCI identity and feedback scales is further bolstered by a number of studies reporting factor-analytic solutions of both the JDS and JCI measures that were consistent with the a priori structure of these scales (see, e.g., Aldag et al., 1981; Fried & Ferris, 1986,1987, for reviews). Moreover, on the basis of content analysis of the JDS and JCI scales, Pierce, McTavish, and Knudson (1986) reported that the two identity scales (a) converge with the conceptual definition of identity and (b) are distinguishable from both the other job-characteristics scales and satisfaction measures. Pierce et al.'s analysis provided similar support for the construct validity of the JDS feedback scale, but less support for the construct validity of the JCI feedback scale. The analysis concerning the relations of autonomy and skill variety with the focal outcomes produced mixed results. Specifically, JDS and JCI variety scales showed similar relations with satisfaction, whereas JDS and JCI autonomy scales produced similar relations with performance. However, the JCI variety 692 a § •v 2 -Q o *•> -g & f •Ss: "" S in °" ~ Q •Q c c c v, .5 .2 .2 | | 11 2 1 11 •|8.g ca > 0 ^3 C g .2> ^u. « — U c Sill >. 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C .1? 4J ' II " E e £ ™ "S-t-r £ m <N in " T3 •a -S -g ™ c ^ > <u £ '€. § " * 'B^-g ^ ^_ S3 b |e gl « -11 JDI = Ji * Variety and (i autonomy and t| ._ w NOK. Keller, Szilagyi Holland (191 Illslll •g * °= =•& s-^ on (/5 vi Griffin (1 982) 0V ^ C ^ ^ * iTT oo Brief & Aldag (1978) Griffin (1981) ^^•i ^i [J ^J <u 3 £5 'fti (1982)" on 3 Wall, Clegg, & Jackson (197 ? i c" M _o <U o atisfaction Questio was not available i a. (- z Professional & c 11 Production & technical m Professional Ii ^ « _ I §§ S Production Job title and posii c o '(5 —• r. 694 YITZHAK FRIED Table 2 Reliability Information of Measures Variable Range of r Median r .20-.91' .64-.97b .31-.90 .77-.99 .35-.90 .S6-.99 J6-.94 .61 -.98 .69-.9S .7S-.96 .69 (.79) .82 .69 (.75) .89 .69 (.82) .84 .70 (.80) .86 .86 .85 Skill variety Task identity Autonomy Job feedback Work satisfaction Job performance Variance of r .020 .009 .014 .004 .011 .018 .023 .011 .005 .005 No. of samples 46 15 47 15 48 15 46 15 31 7 Note. Numbers within parentheses represent the reliability estimates of the Job Diagnostic Survey (JDS) scales adjusted for the number of items of their respective Job Characteristics Inventory (JCI) scale. These estimates are based on the Spearman-Brown formula. a JDS measure. b JCI measure. scale correlated higher with performance relative to the JDS variety scale (the estimated population correlations were .21 and .09, respectively). Moreover, true variance was not detected in the association between JDS variety and performance, but was detected in the relation between JCI variety and this outcome. A more substantial dissimilarity was found in the relations between the alternative autonomy scales and work satisfaction. Table 3 Information on Job Diagnostic Survey (JDS) and Job Characteristics Inventory (JCI) Characteristics as Correlates of Work Outcomes Job characteristics/ no. of samples Total sample size Observed r Corrected r Observed variance Unexplained variance Unexplained variance:observed variance 90% confidence interval for corrected r Work satisfaction Variety 20" 9" Identity 11,356 1,672 .45 .54 .67 .70 .0067 .009 .000 .000 20 9 11,426 1,672 .25 .29 .32 .39 .0036 .0217 .000 .00522 0.24 .30 = s r s . 3 3 .34 < r < .44 11,426 1,598 .50 .28 .71 .38 .0067 .027 .000 .01331 0.49 .69 s r < .72 .24 < r < .52 11,356 1,598 .40 .36 .56 .52 .0062 .0153 .000 .000 .65 < r < .69 .67 <:rs .74 Autonomy 20 7 Feedback 20 7- .54sr<.58 .47=:rs .57 Work performance Variety 8 4 Identity 8 4 Autonomy 8 4 Feedback 1,091 1,066 .06 .15 .09 .21 .0077 .0128 .00058 .00823 1,091 1,066 .10 .12 .13 .17 .0074 .0033 .000 .000 1,091 1,066 .14 .15 .18 .21 .0182 .0154 .01974 .01121 1.08C 0.73 .08 <. r s .30 .07 <; r < .35 1,091 1.066 .15 .13 .22 .19 .0107 .0279 .00511 .04603 0.48 1.65C .13 < ; r < .30 -.02 ^ r ^ .39 0.08 0.64 .08 ;.34 .07 < / • :.19 .10 < r Note. Observed r is the average correlation of sample correlations weighted for sample size. Corrected r is the average weighted correlation corrected for measurement error of the predictor and criterion and range variation. Observed variance indicates the variance for r. Unexplained variance is the variance remaining after correction for sampling error, measurement error of the predictor and criterion, and range variation. A ratio of unexplained variance to observed variance is meaningful when greater than 0.25. • Results for JDS. " Results for JCI. c Because the corrections of the observed variance resulting from error measurement and range variation magnified the already relatively large discrepancies among the absolute values of the correlation coefficients, the unexplained variance became greater than the observed variance (see also Fried & Ferris, 1987). META-ANALYTIC COMPARISON OF THE JDS AND JCI That is, the estimated population correlation between JDS autonomy and satisfaction (.71) was substantially higher than the estimated correlation of JCI autonomy and this outcome (.38). The difference between the two correlations is .33. Moreover, although JDS autonomy had the highest relation with work satisfaction among the JDS scales, JCI autonomy had the lowest relation with this outcome among the JCI scales. In addition, although true variance was not detected in the association between JDS autonomy and satisfaction, it was detected in the relation between JCI autonomy and this outcome. This lack of convergence in the results between the correlations of the alternative autonomy scales and satisfaction may suggest problems with the construct validity of either one or possibly both of these scales. This interpretation is supported by the content analysis of Pierce et al. (1986), who concluded that the autonomy scales of both the JDS and JCI are the most problematic among the job-characteristic scales, and that the items of these scales should be carefully reexamined. Breaugh (1985) suggested that one of the problems with the JDS and JCI autonomy scales is that they are too global in nature and hence susceptible to idiosyncratic interpretation. Developing multiple scales to assess conceptually different facets of autonomy might be essential to enhance the consistency and validity of information regarding both the level and influence of work autonomy (Breaugh, 1985). The unexplained variance in the correlations between job characteristics and performance in the meta-analysis might be a function of the relatively low number of studies and participants involved in the analysis. Alternatively, this unexplained variance might be attributable to contextual factors in the workplace (see e.g., Fried & Ferris, 1987) or possibly the multiple methods used by the studies to assess performance or both. However, the limited number of studies providing correlations between job characteristics and performance precluded followup analyses of potential moderators. Another limitation of the present study is that the presence of similar associations between alternative measures of a job characteristic and an outcome is a necessary but not sufficient condition for demonstrating convergent validity. For example, the magnitudes of the positive correlations between the alternative scales of a focal job characteristic and work satisfaction might reflect, at least in part, measurement artifacts often arising from the use of self-report instruments. Clearly, there is a need to explore this issue of convergent validity directly using more sophisticated methods such as the multitrait, multimethod approach. Future studies should also attempt to explore thoroughly potential underlying sources of the differences in the relations of the alternative job-characteristics scales with outcomes. Such research would enhance knowledge on the psychometric properties of the current scales as well as provide directions for improving these properties. In summation, with these caveats in mind, the results of this study provide additional support for the construct validity of the alternative task-identity and job-feedback scales. Therefore, researchers and practioners can be more confident that the alternative scales measure the same construct and hence are interchangeable. However, there was less compelling evidence for the construct validity of the alternative measures of skill variety and autonomy. Consequently, until future studies have established the psychometric similarities of the alternative measures 695 of skill variety and autonomy, researchers and practitioners should not assume that alternative scales of these job dimensions can substitute for one another. An implication of this warning is that one should be cautious of the conclusions reached in several previous narrative and meta-analytic reviews in the job-design area (see Fried & Ferris, 1987, for a review) that have relied on alternative measures of the core job characteristics under the implicit assumption that the alternative measures are interchangeable. References Aldag, R. J., Barr, S. H., & Brief, A. P. (1981). Measurement of perceived task characteristics. Psychological Bulletin, 90, 415-431. Alderfer, C. P. (1972). Existence, relatedness and growth. New York: Free Press. Arnold, H. J., & House, R. J. (1980). Methodological and substantive extensions to the job characteristics model of motivation. 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Index of organizational reactions (IOR). JSAS Catalog of Selected Documents in Psychology, 6. (Ms. No. 1265) Smith, P. C., Kendall, C. M., & Hulin, C. L. (1969). The measurement of satisfaction in work and retirement. Chicago: Rand McNally. Snyder, S., Head, T. C., & Sorensen, P. F. (1982). Job redesign: A study of the role of context variables and growth needs. Psychological Reports, 50, 33-38. Wall, T. D, Clegg, C. W, & Jackson, P. R. (1978). An evaluation of the Job Characteristics Model. Journal of Occupational Behavior, 2,3149. Weiss, D. J., Davis, R. V, England, G. W, & Lofquist, L. H. (1967). Minnesota studies in vocational rehabilitation: Manual of the Minnesota Satisfaction Questionnaire. Minneapolis: University of Minnesota. META-ANALYTIC COMPARISON OF THE JDS AND JCI 697 Appendix Studies That Provided Correlations of the JDS or JCI Scales With Work Satisfaction and Performance*1 Arnold, H. J., & House, R. J. (1980). 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Job characteristics relationships: Individual and structural moderators. Organizational Behavior and Human Performance, 77, 211-230. Snyder, S., Head, T. C., & Sorensen, P. F. (1982). Job redesign: A study of the role of context variables and growth needs. Psychological Reports, 50, 33-38. Wall, T. D, Clegg, C. W, & Jackson, P. R. (1978). An evaluation of the Job Characteristics Model. Journal of Occupational Behavior, 2, 3149. Al A list of studies that provided information on reliabilities and standard deviations, which were used in the meta-analysis, is available on request. Received May 30,1989 Revision received March 15,1991 Accepted April 5,1991 •