Percorrer por autor "Oliveira, Joao Pedro"
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- The Short Dark Triad (SD3): adaptation and psychometrics among at-risk Male and female youthsPublication . Pechorro, Pedro; Caramelo, Vanessa; Oliveira, Joao Pedro; Nunes, Cristina; Curtis, Shelby R.; Jones, Daniel N.The dark triad is a term used to describe a constellation of three socially harmful personality traits: Machiavellianism, psychopathy, and narcissism. The main aim of the present study was to examine the psychometric properties of the Short Dark Triad (SD3) scale, a brief measure of the dark triad, among a sample (N=412) of male (n=200) and female (n=212) at-risk Portuguese youths. Confirmatory factor analysis revealed the three-factor structure of the SD3 obtained an adequate fit, and measurement invariance across gender was demonstrated, although two items per dimension had to be removed. The Portuguese version of the SD3 scale demonstrated satisfactory psychometric properties, specifically the properties of internal consistency, convergent validity, discriminant validity, and known-groups validity, which overall justifies its use among this population. Findings are discussed in terms of the use of the SD3 scale with male and female at-risk youths.
- Validation study of the Narcissistic Personality Inventory-13 among a school sample of Portuguese youthsPublication . Pechorro, Pedro; Nunes, Cristina; Goncalves, Rui Abrunhosa; Simoes, Mario R.; Oliveira, Joao PedroThe main aim of the present study was to translate and validate the Narcissistic Personality Inventory-13 (NPI-13) among a school sample (N=543) of male and female Portuguese youths. The NPI-13 demonstrated good psychometric properties, namely in terms of its three-factor structure, internal consistency, convergent validity, discriminant validity and criterion-related validity. Positive correlations were found with Conduct Disorder symptoms, alcohol use, drug use and unprotected sex. The psychometric properties of the NPI-13 mostly justify its use among Portuguese adolescents in a school context.