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The objective of this study is to compare the declared licit and illicit drug consumption, between paired methodology (MP) and self assessed questionnaire (CAR). We suggest that understatement of illicit drug use will be minimized with the use of peer methodology, and that licit drug understateme...

Objective: There is evidence that competitive conflicts are the main form of intrasexual competition among men. The capacity to recognize visual cues of fighting ability in competitors is thought to be an important characteristic that allows men to avoid the costs of contest competition. However,...