Enhancing the Validity of Self-Reported Alcohol and Marijuana Consumption Using a Bogus Pipeline Procedure: A Meta-Analytic Review

Abstract

Two separate meta-analyses were conducted to test whether the use of self-report measures within the bogus pipeline (BPL) paradigm yields more valid responses than the use of self-report measures alone for assessing alcohol and marijuana consumption. Weighted mean effect sizes (ds) of 0.01 and -0.12 were obtained for studies using alcohol and marijuana self-reports, respectively. Chi-square tests based on Ns of 1,892 for the alcohol sample and 1,425 for the marijuana sample indicated homogeneity of effect sizes for both databases. Explanations for why a BPL procedure does not improve the validity of self-reported alcohol and marijuana consumption are provided. In addition, alternative methods that may enhance the validity of alcohol and marijuana self-reports are discussed.