The (mis)measure of misbehavior: Cross-national invariance of the Youth Externalizing Problems Screener across 32 countries.

The present study investigated the cross-national measurement invariance of a 10-item Youth Externalizing Problems Screener (YEPS) on a sample of 17,489 adolescents from 32 countries. The original one-factor and two-factor models of YEPS were found to provide a poor fit to the data in most countries. Following the removal of two semantically overlapping items and the inclusion of correlated error terms, adequate model fit was obtained in 31 of 32 countries. Measurement invariance testing of an abbreviated 8-item YEPS (YEPS-SF) supported configural invariance. Partial scalar invariance was achieved only after freely estimating numerous parameters. The alignment analysis revealed that 22% of parameters were non-invariant across countries. South Africa, Hungary, and India showed the largest number of non-invariant parameters, whereas the lowest number was detected in several European countries. These findings highlight the potential of the YEPS-SF for use within individual countries and the challenge of developing cross-culturally comparable measures, suggesting that cultural adaptations may be necessary.