Impulsivity and substance-related attentional bias: A meta-analytic review

Background: Previous research demonstrates the role of attentional bias in addictive behaviors. Impulsivity is thought to affect the strength of attentional biases, and thus, attentional biases might be one mechanism by which impulsivity affects addictive behaviors. However, whether or not impulsivity is related to attentional biases across different conceptualizations of impulsivity and attentional biases has yet to be examined as an initial test of such causal models. Methods: The authors completed a meta-analysis of 13 published research studies examining the relationship between substance-related attentional bias and different conceptualizations of impulsivity. Results: There was a small and significant effect size between impulsivity and substance-related attentional bias (r = 0.20), which was moderated by impulsivity measurement type (Q(b) = 5.91, df = 1, p <0.05): there was a stronger relationship between behavioral impulsivity and substance-related attentional bias (r = 0.22) than trait impulsivity and substance-related attentional bias (r = 0.10). Different components of behavioral impulsivity and trait impulsivity did not affect the relationship. Conclusions: This study is the first systematic and empirical demonstration of the relationship between substance-related attentional bias and impulsivity and suggests viability of future examinations of casual models relating these constructs. Since trait and behavioral conceptualizations differentially relate to substance-related attentional bias, the current review further supports research suggesting how disaggregation of multidimensional constructs can lead to more robust relationships. (c) 2013 Elsevier Ireland Ltd. All rights reserved.