New Validity Evidence of the Global Appraisal of Individual Needs-Short Screener for Evaluating Internalizing/Externalizing Behaviors in Spanish Adolescents.

Objective: The Global Appraisal of Individual Needs (GAIN-SS) is a screening instrument evaluating internalizing/externalizing behaviors. This study examines the validity evidence of the GAIN-SS in Spanish adolescents and explores sex differences in its performance.

Method: Participants were 1,547 Spanish adolescents from the community (females = 48.