Departamento de Psicologia
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Browsing Departamento de Psicologia by Subject "Adolescence"
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- Characterization and Predictors of Paranoid Ideation in YouthsPublication . Sousa, Marina; Carvalho, Célia; da Motta, Carolina; Cabral, Joana Moura; Pereira, Vera Lúcia do Couto; Caldeira, Suzana Nunes; Peixoto, Ermelindo BernardoParanoid ideation is a common thought process that constitutes a defense against perceived social threats. The current study aimed at the characterization of paranoid ideation in youths and to explore the possible predictors involved in the development of paranoid ideations. Paranoid ideation, shame, submission, early childhood memories and current depressive, anxious and stress symptomatology were assessed in a sample of 1516 Portuguese youths. Higher frequencies of paranoid ideation were observed, particularly in females and youths from lower socioeconomic status. The main predictors identified relates to submissive behaviors and adverse childhood experiences, and especially to shame feelings. The current study emphasizes that the predictors are similar to findings in adults and clinical populations, and future implications to research and clinical practice aiming at paranoid ideations are discussed, as well as the pertinence of the study of mediating factors that allow a wider understanding of this thought process in younger populations and the prevention of psychopathology in adulthood.
- Mapping non-suicidal self-injury in adolescence: Development and confirmatory factor analysis of the impulse, self-harm and sucidal ideation questionnaire for adolescents (ISSIQ-A)Publication . Carvalho, Célia; Nunes, Carolina; Castilho, Paula; da Motta, Carolina; Caldeira, Suzana Nunes; Pinto-Gouveia, JoséNon-suicidal self-injury (NSSI) is the deliberate, self-inflicted destruction of body tissue without suicidal intent and an important clinical phenomenon. Rates of NSSI appear to be disproportionately high in adolescents and young adults, and is a risk factor for suicidal ideation and behavior. The present study reports the psychometric properties of the Impulse, Self-harm and Suicide Ideation Questionnaire for Adolescents (ISSIQ-A), a measure designed to comprehensively assess the impulsivity, NSSI behaviors and suicide ideation. An additional module of this questionnaire assesses the functions of NSSI. Results of Confirmatory Factor Analysis (CFA) of the scale on 1722 youths showed items' suitability and confirmed a model of four different dimensions (Impulse, Self-harm, Risk-behavior and Suicide ideation) with good fit and validity. Further analysis showed that youth׳s engagement in self-harm may exert two different functions: to create or alleviate emotional states, and to influence social relationships. Our findings contribute to research and assessment on non-suicidal self-injury, suggesting that the ISSIQ-A is a valid and reliable measure to assess impulse, self-harm and suicidal thoughts, in adolescence.
- Paranoia in the General Population : a revised version of the General Paranoia Scale for adolescentsPublication . Carvalho, Célia; Pereira, Vanessa Micaela da Ponte; da Motta, Carolina; Pinto-Gouveia, José; Caldeira, Suzana Nunes; Peixoto, Ermelindo Bernardo; Fenigstein, AllanThe aim of the current study was to validate the General Paranoia Scale for Portuguese Adolescents population (GPS-A). This scale assesses the paranoid ideation in non-clinical population. Results from a confirmatory factor analysis of the scale on 1218 youths confirmed an alternative model to the one-dimensional model proposed by Fenigstein and Vanable (1992) comprising three different dimensions (Mistrust thoughts, persecutory ideas and depreciation). This alternative model presented a good fit: χ2 (162)= 727.200, p = .000; CFI = .925; RMSEA = .054, P(rmsea ≤0.05) = .000; PCFI = .788; AIC = 863.200. All items presented adequate factor loadings (λij ≥0.5) and individual reliability ((λij)2 ≥0.25). Further data analysis on the scale revealed that the GPS-A is an adequate assessment tool for adolescents, with good psychometric characteristics and high internal consistency.
- Students' engagement in school : analyses according to peer victimization and grade, throughout adolescencePublication . Veiga, Feliciano Henriques; Caldeira, Suzana NunesConceptual Frame: In recent years, students' engagement in school (SES) has been pointed out a mean to prevent and address the occurrence of victimization behaviors between students, either as aggressors or as victims; however, there is a lack of empirical studies on the relationship between these constructs, throughout adolescence. Objective: To study how the relationships between SES and victimization behaviors vary throughout the adolescence years of schooling is the aim of the present study. Method: The sample consisted of 685 students from different regions of the country, of both sexes, divided by grade (6th, 7th, 9th and 10th). Data were collected in classroom context through a survey that included items from the "Multidimensional Peer Victimization Scale" and the questionnaire "Student's Engagement in School - A Four Dimensional Scale (SES-4DS)", which includes a cognitive, an affective, a behavioral and an agentic dimension (Veiga, 2013). Results: The results from the analysis of engagement variance (anova two-way 2x3), according to grade (6th and 7th versus 9th and 10th grades) and peer victimization (low, medium and high), allowed to find a decrease throughout schooling years, either in SES, as in peer victimization behaviors (PVB); the significant effects of the interaction of the variables PV and grade emerged only in the cognitive and behavioral dimensions, and were due to a larger decrease in such dimensions, in the group with higher PVB, throughout the years. Conclusions: results are considered within the context of social-cognitive perspective of development; and suggest further deeper analyses, in addition to activation measures of variables such as students' engagement in school, as a form to diminish peer victimization conducts.