Aggression is a multidimensional construct comprised of different forms and functions, the assessment of which has important implications for understanding externalizing problems in male and female youth. The main aim of the present study is to examine the psychometric properties of a form and function aggression measure, the Brief Peer Conflict Scale 20 (PCS-20) among a community sample of youth (N = 470, M = 15.89 years, SD = 1.00 years) from Portugal, divided into females (n = 213) and males (n = 257). The original four-factor latent structure of the PCS-20 obtained an adequate fit using confirmatory factor analysis, and strong cross gender invariance was demonstrated. The PCS-20 also demonstrated adequate reliability (measured by the Omega and Alpha coefficients), convergent and discriminant validities, criterion validity, and known-groups validity. Our findings support the use of the PCS-20 among Portuguese juveniles as a short measure of the forms and functions of aggression.

侵略是一个由不同形式和功能组成的多维结构，对其进行评估对于理解男性和女性青年的外在问题具有重要意义。本研究的主要目的是研究一种形式和功能性侵害措施的心理测量特性，即在社区的青年样本中（N  = 470，M  = 15.89岁，SD  = 20）的简短同伴冲突量表20（PCS-20）。葡萄牙（1.00岁），分为女性（n  = 213）和男性（n = 257）。使用验证性因子分析，PCS-20的原始四因子潜在结构获得了足够的拟合，并且证明了强大的跨性别不变性。PCS-20还显示出足够的可靠性（通过Omega和Alpha系数测量），收敛性和判别性有效性，标准有效性和已知群体有效性。我们的研究结果支持在葡萄牙青少年中使用PCS-20作为侵略形式和功能的简短衡量标准。