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- Portuguese validation of the brief peer conflict scale: Validity, reliability and invariance across genderPublication . Pechorro, Pedro; Hayes, Nicole; Goncalves, Mariana; Palma, Victor Hugo; Goncalves, Rui Abrunhosa; Marsee, MonicaAggression 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.
- Examination of the SUPPS-P impulsive behavior scale among male and female youth: Psychometrics and invariancePublication . Pechorro, Pedro; Revilla, Rebecca; Palma, Victor Hugo; Nunes, Cristina; Martins, Cátia; Cyders, Melissa A.The UPPS-P Impulsive Behavior Scale is one of the most used and easily administered self-report measures of impulsive traits. The main objective of this study was to examine the psychometric properties of the shorter SUPPS-P scale among a school sample of 470 youth (Mage = 15.89 years, SD = 1.00) from Portugal, subdivided into males (n = 257, Mage = 15.97 years, SD = 0.98) and females (n = 213, Mage = 15.79 years, SD = 1.03). Confirmatory factor analysis results revealed that the latent five-factor structure (i.e., Negative urgency, Lack of perseverance, Lack of premeditation, Sensation seeking, and Positive urgency) obtained adequate fit and strong measurement invariance demonstrated across sex. The SUPPS-P scale also demonstrated satisfactory psychometric properties in terms of internal consistency, discriminant and convergent (e.g., with measures of youth delinquency, aggression) validities, and criterion-related validity (e.g., with crime seriousness). Findings support the use of the SUPPS-P scale in youth. Given the importance of adolescence as a critical period characterized by increases in impulsive behaviors, having a short, valid, reliable, and easily administered assessment of impulsive tendencies is important and clinically impactful.