Journal of Mental Health, December 2006; 15(6): 671 – 682 Relations of social anxiety variables to drinking motives, drinking quantity and frequency, and alcohol-related problems in undergraduates SHERRY H. STEWART1, ERIC MORRIS1, TANNA MELLINGS2, & JENNIFER KOMAR3 1 Departments of Psychiatry, Psychology, and Community Health and Epidemiology, Dalhousie University, Nova Scotia, 2A. T. Malcolm & Associates, Victoria, British Columbia, and 3Department of Psychology, University of Waterloo, Ontario, Canada Abstract Background: The co-morbidity between social phobia and alcohol disorder is well established. Aims: This study investigated the nature of the relationship between traits associated with these disorders. Method: A total of 157 undergraduate drinkers (112 women; 45 men) completed measures tapping aspects of social phobia (i.e., the Social Avoidance and Distress Scale and the Brief Fear of Negative Evaluation scale) and drinking behavior (i.e., the Drinking Motives Questionnaire – Revised, quantity and frequency of alcohol consumption, and the Rutgers Alcohol Problem Index). Results: Correlational analyses (controlling for gender) revealed that: (i) social avoidance and distress was significantly negatively related to drinking frequency; (ii) fear of negative evaluation and social avoidance and distress were both significantly positively related to drinking to cope with negative emotions and to conform to peer pressure; and (iii) fear of negative evaluation was also significantly positively related to drinking to socialize and to drinking problems. The relationship between fear of negative evaluation and drinking problems was mediated by coping and conformity drinking motives. Conclusions: Implications for developing effective integrated treatments for co-occurring social anxiety and alcohol problems are discussed, as are preventative implications. Keywords: Alcohol abuse, social anxiety, drinking behavior, negative evaluation sensitivity, social avoidance and distress, drinking motives Introduction A number of studies have demonstrated a strong co-morbidity between social phobia (SP) and alcohol use disorders (AUD) (e.g., Grant et al., 2004; Kessler et al., 1994). This relationship has been seen whether one examines rates of AUDs in SP populations or vice versa, and whether one examines the relationship in treatment seeking samples or in the general population. For example, those with SP are 2 to 3 times more likely to develop an AUD, than those without (Kushner et al., 1990). Similarly, those with an AUD are up to 10 times more likely to demonstrate SP than those who do not have an AUD (Kessler et al., 1997). Correspondence: Sherry H. Stewart, Psychiatry & Psychology, Life Sciences Centre, 1355 Oxford Street, Halifax, Nova Scotia, B3H 4J1, Canada. E-mail: sstewart@dal.ca ISSN 0963-8237 print/ISSN 1360-0567 online Ó Shadowfax Publishing and Informa UK Ltd. DOI: 10.1080/09638230600998904 672 S. H. Stewart et al. Several theoretical models have been applied to account for the relationship between SP and AUD (see Carrigan & Randall, 2003). Three of the most prominent are the TensionReduction Theory (Conger, 1956), the Stress Response Dampening model (Sher & Levenson, 1982), and the Self-Medication Hypothesis (SMH; Khantzian, 1985). These theories argue that alcohol reduces anxiety or arousal, providing negative reinforcement of the drinking response. Social situations and internal anxiety symptoms are seen as conditioned cues that signal the onset of drinking and the rewarding consequences of anxiety relief (see Morris et al., 2005). These models predict that social anxiety should be positively correlated with alcohol use and misuse. However, when one examines the literature in nonclinical samples of undergraduates, the findings do not always support this prediction. Some studies do support a significant positive relationship between social anxiety and alcohol-related variables. For example, Lewis and O’Neill (2000) found that problem drinking students had significantly higher scores on the Social Avoidance and Distress Scale and the Fear of Negative Evaluation measure (SADS and FNE; Watson & Friend, 1969), but not on the Shyness Scale (Cheek & Buss, 1981), compared with non-problem drinkers. Similarly, Buckner et al. (in press) found scores on the Social Interaction Anxiety Scale (SIAS; Mattick & Clarke, 1998) were significantly positively correlated with alcohol problems. Kidorf and Lang (1999) demonstrated experimentally that undergraduates with high SADS scores drank more alcohol prior to an anxiety-provoking social situation than those with low SADS scores. However, other studies with undergraduates have failed to show a relationship between social anxiety and alcohol-related variables, or have shown an inverse direction relation. For example, Bruch et al. (1992) found no significant bivariate correlation between Shyness Scale scores (Cheek & Buss, 1981) and drinking levels. Eggleston et al. (2004) showed that SIAS scores (Mattick & Clarke, 1998) were significantly inversely related to drinking frequency, but unrelated to alcohol problems. Ham and Hope (2005) similarly showed that scores on the Interaction Anxiousness Scale (IAS; Leary, 1983a) were significantly inversely related to drinking levels and unrelated to alcohol problems. One possible reason for these discrepant findings pertains to differences in the ways in which social anxiety has been conceptualized and assessed across studies. Prior studies have often failed to recognize that social anxiety is multifaceted and can be manifest in a variety of ways (e.g., fear of negative evaluation vs. social avoidance and distress vs. social interaction anxiety vs. shyness; see Leary, 1983a). As a consequence, most studies have erroneously treated social anxiety as a uni-dimensional construct, assessed with a single measure. Prior studies have also tapped very different aspects of drinking behavior, ranging from drinking quantity and frequency to drinking problems. But different aspects of social anxiety may relate differentially to the various aspects of drinking behavior. For example, Lewis and O’Neill’s (2000) finding that fear of negative evaluation was positively related to drinking-related variables, while shyness was unrelated to the same drinking variables, suggests that the trait of negative evaluation sensitivity, rather than that of shyness, motivates alcohol misuse. As another example, although social phobia may be positively related to alcohol problems (Lewis & O’Neill, 2000), it may be inversely related to drinking frequency (Eggleston et al., 2004) – a pattern that could be explained if socially phobic individuals tend to avoid social situations where alcohol is served, but rely on alcohol to cope when they do attempt to face such feared situations. Studies on the relationship between social anxiety and drinking have also largely failed to consider the role of drinking motives (i.e., reasons for alcohol use). One prominent model posits that motives for consuming alcohol can be organized across two primary dimensions (valence and source) relating to the goals the individual desires to obtain from drinking (Cooper, 1994). Valence refers to the type of reward that the individual hopes to achieve by drinking: (i.e., positive or negative reinforcement). Source refers to the location of the Social anxiety and drinking 673 expected reward: internal (e.g., change in emotional state) or external (e.g., change in social situation). In crossing these two dimensions, four drinking motives emerge: (i) enhancement motives (internal/positive) involve drinking to enhance one’s emotional state (e.g., ‘‘Because it gives you a pleasant feeling’’); (ii) social motives (external/positive) involve drinking to achieve positive social outcomes (e.g., ‘‘Because it helps you enjoy a party’’); (iii) coping motives (internal/negative) involve drinking to reduce negative mood states (e.g., ‘‘Because you feel more self-confident and sure of yourself’’); and (iv) conformity motives (external/negative) involve drinking to avoid peer disapproval (e.g., ‘‘So you won’t feel left out’’). These four motives show differential relationships with various aspects of drinking behavior: the internal motives (i.e., coping and enhancement) are associated with heavier alcohol consumption, and the negative reinforcement motives (i.e., coping and conformity) are directly associated with alcohol problems even after controlling for drinking levels (Cooper, 1994). A final limitation of much of the prior literature is the general failure to consider the role of gender. Many of the observed relations between social anxiety variables and alcoholrelated variables appear to be moderated by gender (see Morris et al., 2005). Moreover, the relationship between SP and AUD is stronger in women than men when compared to gender-specific base-rates (Kessler et al., 1997). Thus, it is important for research in this area to either test the moderating effect of gender, or at least control for gender effects. This study was designed in the interest of advancing the understanding of the relationship between social anxiety levels and drinking variables in a non-clinical sample of undergraduate drinkers. To overcome the limitations of prior work, we employed more than one measure of social anxiety (i.e., social anxiety and distress vs. fear of negative evaluation), we examined more than one aspect of drinking behavior (i.e., drinking quantity, drinking frequency, and alcohol problems), we examined the role of various drinking motives in Cooper’s (1994) model, and we controlled for the effects of gender. We expected positive relationships between both social anxiety measures and the alcohol problems measure (cf. Lewis & O’Neill, 2000). At the same time, we expected significant negative correlations between the social anxiety measures and the drinking quantity and frequency measures since socially anxious students less frequently attend social events, where heavy drinking is normative among undergraduates (see Ham & Hope, 2005). There are reasons to expect relations between social anxiety and certain drinking motives. First, the SMH would predict that social anxiety levels should be strongly positively associated with self-reports of drinking to cope with negative emotions. Second, those who experience distress in social situations and who fear negative evaluation may be more prone than others to use alcohol to conform to peers’ expectations in an attempt to ‘‘fit in’’ in social situations. For these reasons, we expected significant positive correlations between the social anxiety measures and the negative reinforcement drinking motives of coping and conformity. Finally, we examined the potential mediating (i.e., intervening and explanatory) role of drinking motives in contributing to the expected relationship between social anxiety and alcohol problems. Consistent with predictions derived from the SMH, we hypothesized that drinking to cope would mediate the social anxiety – alcohol problems relation. Methods Participants One-hundred-and-seventy-six undergraduates at Dalhousie University completed study measures. Of the original sample, 157 students (71% women) were ‘‘drinkers’’ (i.e., had consumed alcohol in the past year). The 19 ‘‘non-drinkers’’ were excluded. The average age 674 S. H. Stewart et al. of the drinkers was 21.4 years (SD ¼ 3.5; range ¼ 19 – 54) and their average university education level was 2.7 years (SD ¼ 0.8; range ¼ 2 – 4 years). Measures The Brief FNE (FNE-B; Leary, 1983b) scale is a truncated version of the original FNE (Watson & Friend, 1969). It is comprised of 12 items tapping concerns about the opinions of others (e.g., ‘‘I am afraid that others will not approve of me’’). The 5-point scoring system ranges from 1 (‘‘Not at all characteristic of me’’) to 5 (‘‘Extremely characteristic of me’’). It is highly correlated with the original FNE and demonstrates good internal consistency and validity (Collins et al., 2005; Leary, 1983b; McWilliams et al., 2000). The Social Avoidance and Distress Scale (SADS; Watson & Friend, 1969) is a 28item true/false scale. Half of the items pertain to social avoidance (e.g., ‘‘I try to avoid situations which force me to be very sociable’’) and the other half tap distress in social situations (e.g., ‘‘I often find social occasions upsetting’’). Half are reverse keyed. The SADS has excellent internal consistency and good one-month test-retest reliability (Watson & Friend, 1969). We used the corrected scoring suggested by Hofmann et al. (2004). The Drinking Motives Questionnaire Revised (DMQ-R; Cooper, 1994) is a 20-item selfreport scale designed to examine drinking in relation to the four distinct motives in Cooper’s model, each tapped by a 5-item subscale. Participants record their relative frequency of drinking for each indicated reason on a 5-point scale, ranging from 1 (‘‘never/almost never’’) to 5 (‘‘always/almost always’’). The DMQ-R has high internal consistency, good structural validity, and good criterion-related validity (Cooper, 1994). The Rutgers Alcohol Problems Index (RAPI; White & Labouvie, 1989) is a 23-item selfreport measure that can be used with both clinical and non-clinical adolescents and young adults. Participants report on a 5-point scale, ranging from 0 (‘‘never’’) to 4 (‘‘more than 10 times’’), the number of times over the past 3 years they have experienced each indicated alcohol-related problem (e.g., getting into fights, acting bad or doing mean things, not being able to do homework or study for a test). An author-compiled demographics questionnaire was used to record age, gender, and the current year of university. Drinking quantity and frequency measures were embedded in this measure to decrease their salience (see Sobell & Sobell, 1990). Participants were asked about their drinking frequency in terms of the number of occasions they usually drank alcohol per week. Those participants who did not usually consume alcohol at least once per week were asked to provide an estimate of their monthly or yearly frequency. Drinking quantity was measured by asking participants how many standard drinks they usually consume per occasion, with one ‘‘drink’’ defined as 12 oz beer, 4 oz wine, or 1 oz hard liquor (cf. Stewart et al., 2000). Procedure Participants completed questionnaires in a group format during a 50 minute class period. Informed consent was obtained prior to completion of measures. Questionnaires were ordered randomly and completed anonymously to help preserve participants’ confidentiality while completing the measures in a group setting. Participants were compensated with course credit. Social anxiety and drinking 675 Results Mean scores (and SDs) are reported for all study variables in Table I as a function of gender. Sample means compare well to scores previously reported for university students on these measures. Coefficient alphas are also presented in Table I. Study measures showed adequate to excellent internal consistencies. Correlations between measures of similar constructs The correlation between the FNE-B and the SADS was significant (r ¼ .60, p 5 .001). Drinking quantity and frequency were significantly correlated (r ¼ .33, p 5 .001). The RAPI was significantly correlated with the drinking quantity and frequency (r’s ¼ .43 and .57, respectively, p’s 5 .001). The subscales of the DMQ-R were all significantly intercorrelated, with correlation coefficients ranging from r ¼ .17, p 5 .05 (conformity with enhancement) to r ¼ .61, p 5 .001 (social with enhancement). Finally, with only one exception, the subscales of the DMQ-R were all significantly correlated with drinking quantity (r ¼ .13, n.s. for conformity to r ¼ .45, p 5 .001 for enhancement), drinking frequency (r ¼ .17, p 5 .05 for conformity to r ¼ .43, p 5 .001 for enhancement), and the RAPI (r ¼ .37, p 5 .001 for social to r ¼ .52, p 5 .001 for coping). Correlations between social anxiety measures and drinking variables Partial correlations were computed between the social anxiety measures and the drinking measures, with gender as a covariate (see Table II). Three of the four DMQ-R drinking motives were, significantly, positively related to the FNE-B, with coping motivated drinking demonstrating the strongest relationship, followed by conformity motivated drinking, and finally socially motivated drinking. A similar pattern was noted for the SADS which was significantly positively correlated with both coping and conformity motives. Table I. Means and standard deviations for the men and women drinkers on study variables. FNE-B SADS DMQ-R Social DMQ-R Enhancement DMQ-R Coping DMQ-R Conformity Drinking Frequency Drinking Quantity RAPI Internal Consistency (a) Possible Range (min. – max.) 0.96 0.93 0.86 0.87 0.81 0.78 – – 0.92 12 – 60 0 – 28 1–5 1–5 1–5 1–5 – – 0 – 92 Men (n ¼ 45) M (SD) 29.98 4.84 3.17 2.67 1.61 1.42 0.93 7.20 37.69 (10.99) (5.28) (0.96) (0.87) (0.74) (0.51) (0.76) (3.45) (14.81) Women (n ¼ 112) M (SD) 33.34 6.62 3.12 2.79 1.70 1.34 0.75 4.97 34.02 (11.88) (6.87) (1.00) (1.10) (0.69) (0.58) (0.66) (3.06) (11.01) Notes: SADS ¼ Social Avoidance and Distress Scale (Watson & Friend, 1969); FNE-B ¼ Brief Fear of Negative Evaluation scale (Leary, 1983b); RAPI ¼ Rutgers Alcohol Problem Index (White & Labouvie, 1989); DMQR ¼ Drinking Motives Questionnaire Revised (Cooper, 1994); Drinking Frequency ¼ drinking occasions per week; Drinking Quantity ¼ number of drinks per drinking occasion. Internal consistency and possible range not presented for Drinking Frequency and Drinking Quantity because these are open-ended single item measures. 676 S. H. Stewart et al. Table II. Partial correlations between the social anxiety measures (FNE-B and SADS) and the drinking measures (DMQ-R subscales, drinking quantity and frequency, and RAPI) with gender controlled. FNE-B DMQ-R Social DMQ-R Enhancement DMQ-R Coping DMQ-R Conformity Drinking Frequency Drinking Quantity RAPI .210** .150 .427** .254** .019 7.014 .179* SADS .122 7.034 .221** .160* 7.204** 7.046 .026 Notes: SADS ¼ Social Avoidance and Distress Scale (Watson & Friend, 1969); FNE-B ¼ Brief Fear of Negative Evaluation Scale (Leary, 1983b); RAPI ¼ Rutgers Alcohol Problem Index (White & Labouvie, 1989); DMQ-R ¼ Drinking Motives Questionnaire Revised (Cooper, 1994); Drinking Frequency ¼ number of drinking occasions per week; Drinking Quantity ¼ number of standard alcoholic beverages consumed per drinking occasion. *p 5 0.05; **p 5 0.01. With regard to drinking behavior, only the SADS was significantly, negatively related to drinking frequency. Neither social anxiety measure was related to drinking quantity. With regard to alcohol problems, only the FNE-B was significantly positively related to RAPI scores (see Table II). Mediator analysis To further delineate the mechanisms underlying the significant relationship between the FNE-B and the RAPI, mediator analyses were conducted. Although coping motives were the only hypothesized mediator, conformity and social motives from the DMQ-R were chosen as additional potential mediator variables because they were also significantly correlated with FNE-B scores. We followed steps outlined by Baron and Kenny (1986) for testing mediation. First, a multiple regression analysis was conducted using gender and FNE-B scores (predictor) to predict RAPI scores (criterion). The regression equation was significant, R2 ¼ .049, adjusted R2 ¼ .037, F (2, 155) ¼ 4.018, p 5 .05. Both male gender (b ¼ .163, p 5 .05) and higher FNE-B scores (b ¼ .175, p 5 .05) independently predicted greater scores on the RAPI. Next, a set of multiple regressions were conducted using gender and FNE-B scores (predictor) to predict each of the three DMQ-R scale scores (mediators), in turn. In the case of coping motives, the regression equation was significant, R2 ¼ .184, adjusted R2 ¼ .174, F (2, 155) ¼ 17.530, p 5 .001. Only higher FNE-B scores (b ¼ .430, p 5 .001) independently predicted greater coping motives. In the case of conformity motives, the regression equation was significant, R2 ¼ .068, adjusted R2 ¼ .056, F (2, 155) ¼ 5.616, p 5 .005. Only higher FNE-B scores (b ¼ .253, p 5 .005) independently predicted greater conformity motives. In the case of social motives, the regression equation was significant, R2 ¼ .044, adjusted R2 ¼ .032, F (2, 155) ¼ 3.589, p 5 .05. Again, only higher FNE-B scores (b ¼ .210, p 5 .01) independently predicted greater social motives. Third, a further multiple regression analysis was conducted where coping, conformity, and social motives scores along with gender were entered simultaneously (mediators) in the prediction of RAPI scores (criterion). The linear combination of the drinking motives and gender was significantly related to RAPI scores, R2 ¼ .375, adjusted R2 ¼ .359, F(4, 153) ¼ 22.966, p 5 .001. Both male gender (b ¼ .138, p 5 .05) and higher coping Social anxiety and drinking 677 (b ¼ .395, p 5 .001) and conformity (b ¼ .247, p 5 .001) motives scores independently predicted greater scores on the RAPI. The final multiple regression analysis involved simultaneously regressing gender, coping motives, conformity motives, social motives (potential mediators) and FNE-B scores (predictor) onto the RAPI scores (criterion). The linear combination of these five predictors was significantly related to RAPI scores, R ¼ .384, R2 ¼ .364, F (5, 152) ¼ 18.966, p 5 .001. In this equation, only coping (b ¼ .436, p 5 .001) and conformity (b ¼ .260, p 5 .001) motives scores independently predicted RAPI scores. The relationship between FNE-B and RAPI scores was no longer significant after accounting for coping and conformity motives (see Figure 1). Overall, these results demonstrate that the relation between fear of negative evaluation and alcohol problems was mediated not only by coping motives (as hypothesized) but also by conformity motives – both negative reinforcement drinking motives. Discussion Although it is well established that SP and AUDs are highly co-morbid, little is known about the nature of the relations between these disorders. Moreover, there have been very Figure 1. The mediating role of negative reinforcement drinking motives in explaining the relationship of fear of negative evaluation to drinking problems. FNE-B ¼ Brief Fear of Negative Evaluation scale (Leary, 1983b); RAPI ¼ Rutgers Alcohol Problem Index (White & Labouvie, 1989); DMQ-R ¼ Drinking Motives Questionnaire Revised (Cooper, 1994). Values presented are standardized beta weights (b). All regressions controlled for gender, and regressions with drinking motives as predictors controlled for social drinking motives. 678 S. H. Stewart et al. inconsistent findings regarding the direction of the relation between social anxiety and drinking measures in undergraduates with some studies suggesting positive relations and other studies suggesting inverse relations (Morris et al., 2005). The present results help resolve these discrepancies in the literature by suggesting that the direction of the relationship depends on the specific aspect of social anxiety, as well as the specific alcoholrelated variable, in question. As expected, social anxiety was significantly positively related to drinking problems, but this was only true for the fear of negative evaluation aspect of social anxiety, at least in undergraduates. Also as expected, social anxiety was significantly negatively related to drinking frequency, but this was only true for social avoidance and distress. These results highlight the importance of separate assessment of social anxiety subcomponents, including social avoidance and distress, and sensitivity to negative evaluation (Watson & Friend, 1969). The findings also highlight the importance of separate assessment of drinking levels versus drinking problems (McCreary & Sadava, 1998). Our finding that fear of negative evaluation on the FNE-B was significantly correlated with levels of drinking problems on the RAPI is consistent with the recent work of Buckner et al. (in press) showing a relationship between social interaction anxiety and drinking problems. Our finding also replicates and extends the prior findings of Lewis and O’Neill (2000), who showed that problem drinking undergraduates had higher scores on the original FNE than non-problem drinking students. However, this prior study further showed that the problem drinkers also scored higher on the SADS than did the non-problem drinkers – a relationship that was not replicated in the present study. This discrepancy could be due to differences in the measures of drinking problems employed across studies (Lewis & O’Neill used the Rutgers Collegiate Substance Abuse Screening Test [Bennett et al., 1993] whereas we used the RAPI), or to the fact that they selected and compared extreme groups of problem and non-problem drinkers while we used an unselected sample of drinkers. Nonetheless, even in the Lewis and O’Neill study, the magnitude of the relationship of alcohol problems to fear of negative evaluation was much larger than the magnitude of its relationship to social avoidance and distress. Our finding that social avoidance and distress was inversely related to drinking frequency is consistent with an emerging body of data suggesting that social anxiety may actually predict lesser alcohol consumption (e.g., Eggleston et al., 2004; Ham & Hope, 2005), at least in undergraduates (see Morris et al., 2005). One possible explanation is that socially anxious individuals drink less heavily because they are concerned about negative social evaluation due to intoxication. Another possibility is that socially anxious individuals drink less often because their social avoidance leads to fewer social opportunities where alcohol is involved. The observed pattern is more consistent with the latter explanation because the finding was for a relationship between social avoidance and distress (not fear of negative evaluation) with drinking frequency (not drinking quantity). How can fear of negative evaluation be related to drinking problems without also being associated with heavier drinking behavior? To explain this apparently paradoxical pattern, one must consider that maladaptive reasons for drinking can be as strongly predictive of drinking problems as heavy drinking behavior itself. In fact, Cooper’s (1994; Cooper et al., 1992) work has demonstrated that the negative reinforcement motives of coping and conformity are related to alcohol problems, even after controlling usual consumption levels. Individuals who drink to avoid negative outcomes may come to rely on alcohol as a coping strategy, thereby increasing risk for alcohol-related problems, regardless of how much alcohol they usually consume. Our study also examined relations of social anxiety to the various drinking motives in Cooper’s (1994) model of reasons for drinking. The results were supportive of our Social anxiety and drinking 679 hypotheses, in that both coping and conformity motivated drinking demonstrated significant relationships with both the FNE-B and SADS. This pattern of findings is consistent with recent findings of Buckner et al. (in press) linking social anxiety (specifically, social interaction anxiety) to drinking in situations involving unpleasant emotions and conflict with others. The observed relationship of the social anxiety variables with coping and conformity drinking motives in undergraduates is also highly consistent with recent findings from a controlled study of community-recruited socially anxious adults, which concluded that these individuals deliberately drink alcohol in social interaction situations to cope with their social fears (Thomas et al., 2003). Unexpectedly, fear of negative evaluation was also correlated (albeit relatively weakly) with social motives which are commonly considered quite normative and a relatively ‘‘healthy’’ reason for drinking. One possible explanation is that those who fear negative evaluation may find it hard to affiliate in social interaction situations without the use of alcohol. If this is the case, then one would expect social motives to relate quite differently to indices of drinking behaviors and problems among those who fear negative evaluation compared to the relatively benign drinking profile associated with social motives in the general population (Cooper, 1994; Cooper et al., 1992). The inclusion of an assessment of drinking motives in the present study allowed for an interesting test of potential mechanisms to explain the observed relation between fear of negative evaluation and alcohol problems. Mediator analyses demonstrated that the relation between fear of negative evaluation and alcohol problems was explained by the increased tendency of individuals sensitive to negative evaluation to drink to avoid negative outcomes (i.e., by their increased coping and conformity motives). A very different pattern of mediation was observed in a recent study by Buckner et al. (in press) where enhancement drinking motives (and not coping or social motives) mediated the relation between social interaction anxiety and alcohol problems. It is possible that social interaction anxiety may share more in common with depression than does fear of negative evaluation; thus, those with high social interaction anxiety may be particularly likely to drink to increase positive affect (enhancement motives) which in turn puts them at risk for problem drinking (Buckner et al., in press). Several study limitations should be acknowledged. First, since the present study focused on undergraduates, the results may not be generalizable to older adults or to clinical samples of individuals with co-morbid SP – AUD. Future studies should examine whether the findings can be replicated in a clinical sample. A second limitation pertains to our use of selfreport questionnaires where results might be influenced by common method variance, which could inflate the correlations between the variables. Future research should make use of alternative methodologies (e.g., experimental methods; cf., Abrams et al., 2002) to test relations between various aspects of social anxiety and drinking motives and behavior. Third, the cross-sectional, correlational design precludes causal interpretations of the findings. For example, it is possible that drinking problems cause increased sensitivity to negative evaluation rather than the other way around. Thus, longitudinal studies are required. Fourth, although we did control for the influences of gender, the number of men in the sample was insufficient to allow for adequate testing of possible moderating effects of gender – an issue that should be investigated in future studies. Finally, many of the observed relations, although significant, were relatively small in magnitude. Thus, future research should examine potential moderator variables (cf. Tran et al., 1997) to see if subgroups of those who fear negative evaluation may be particularly prone to alcohol problems. There are currently no empirically validated interventions for treating individuals with comorbid SP – AUD (see review by Randall et al., in press). Randall et al. (2001) examined whether cognitive behavioral treatment of those with co-morbid SP – AUD was more 680 S. H. Stewart et al. successful in a combined social anxiety and alcohol treatment, relative to an alcohol-only treatment control. Directly contrary to hypothesis, at the end of treatment, those in the combined treatment were drinking more alcohol, more often, than those in the alcohol-only treatment group. Given these disappointing early results, additional research is needed to develop more effective integrated interventions for the treatment of this form of comorbidity. Presuming the present findings can be replicated in a clinical sample, the results may be useful in informing the content of such future intervention efforts. Our findings suggest that catastrophic thoughts related to concerns about negative social evaluation should be a central focus in cognitive behavioral approaches because this aspect of social anxiety appears most closely tied to alcohol problems. Our findings also suggest that a focus on reducing negative reinforcement drinking motives (both coping and conformity) should be an important part of the intervention process (see Conrod et al., 2006, for sample techniques). Although the present findings suggest that undergraduates with high levels of social avoidance may be at low risk for alcohol problems due to their infrequent drinking behavior, it should be cautioned that this could change as these individuals challenge their social avoidance over the course of exposure treatment. In fact, Randall et al. (in press) have speculated that one of the reasons for the poorer outcome on drinking measures of their combined treatment in the Randall et al. (2001) randomized controlled trial was that the SP individuals began drinking more frequently as their social avoidance decreased (i.e., due to increased exposure to situations like parties where drinking is normative). This is an interesting possibility deserving of future study. Our findings also have preventative implications. Recently, Kendall et al. 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