Components of identity expression in problem and non-problem gamblers.

Few studies have examined whether specific aspects of group identification predict problematic and non-problematic addictive behaviours and none have focused on gambling. Applying Leach et al.'s (2008) hierarchical model of in-group identification, we tested the associations between components of self-investment (satisfaction, solidarity, and centrality) and components of self-definition (individual self-stereotyping, in-group homogeneity) on distinguishing between problem and non-problem gambling (n = 10,157) and on the severity of problematic gambling behaviour (n = 2,568). Results showed that (i) in-group-based identities are important in predicting problematic vs. non-problematic gambling behaviours; (ii) in-group-based identities are important in predicting the severity of problematic gambling; (iii) how self-invested an individual is with their in-group and aspects associated with self-definition processes are both important predictors; (iv) perceptions related to how chronically salient one's group membership is for the self (centrality) are essential features of the self-investment mechanism; and (v) self-stereotypical beliefs about one's essential similarities to the prototypical gambling group member norm are fundamental for the defining oneself as a gambler.

The effects of self-critical rumination on shame and stress: an experimental study.

BACKGROUND: Self-critical rumination is the process of repetitively thinking about one's past instances of failure without actively problem-solving. Shame has a central role within self-critical rumination and is accompanied by physiological changes that resemble stress responses. AIMS: To experimentally investigate the effects of self-critical rumination on shame and stress following perceived failure. METHOD: Sixty volunteers engaged in an impossible task that resulted in guaranteed failure. Four groups, combining presence or absence of induced self-critical rumination with high or low performance expectations, were created. Self-reports were used to measure levels of shame and stress at baseline immediately after the task, as well as following a debrief on the real purpose of the study. RESULTS: Participants experiencing self-critical rumination accompanied by high performance expectations reported higher levels of shame and stress, especially immediately following the impossible task. On average, members of the high-expectations groups tended to score higher on shame and stress scales. Reported levels of trait self-critical rumination were also significantly correlated with levels of shame and stress across time when controlling for group membership and baseline stress and shame, respectively. CONCLUSIONS: Self-critical rumination in highly evaluative circumstances increased levels of shame and stress following perceived failure. Even though highly evaluative conditions are considered a particularly strong predictor of shame and stress, they could potentially result in self-critical rumination; this matter needs to be addressed in future research.