The main purpose of this study was to analyze the internal structure and measurement invariance across gender and age of the Strengths and Difficulties Questionnaire (SDQ), self-reported version, in Spanish adolescents. The sample consisted of 1,547 participants, 606 were male (39.1%), with a mean age of 15.15 years (SD = 1.99). Results from the confirmatory factor analysis showed a five-factor model and a bifactor model with correlated errors added as the most appropriate. Nevertheless, the bifactor model displayed lower and non-significant factor loadings. The hypothesis of measurement invariance of the SDQ scores across gender and age was supported. The level of internal consistency of the Total difficulties score was .84, ranging between .71 and .75 for the SDQ subscales. The study of the psychometric properties showed that the Spanish version of the SDQ, self-reported form, seems to be an adequate tool for the screening of emotional and behavioural problems during adolescence. Future research should analyze the internal structure of the SDQ in other regions and testing the measurement invariance across cultures.

Objetivo. Identificar si existen diferencias entre sexos en conductas de bullying y cyberbullying entre losadolescentes de La Rioja. Método. La muestra estuvo constituida por 979 adolescentes, 50.45 % varones y49.6 % mujeres, entre los 13 y los 18 años de edad, a quienes se les aplicó la batería Cyberbullying Screeningpara explorar el acoso entre iguales. Resultados. Los resultados evidenciaron que: (a) hay un mayor porcentaje de mujeres víctimas de bullying y cyberbullying; (b) los chicos dijeron ser más agresores que las chicas, tanto en conductas de bullying como de cyberbullying; (c) las mujeres dicen observar más conductas de bullying y cyberbullying que los varones, siendo significativa la diferencia con respecto a este último; y (d) el porcentaje de víctimas de agresiones cara a cara y cyberbullying se asemeja entre mujeres y varones, siendo no significativa la diferencia. Conclusión. Estos datos evidencian que los varones son más agresores, mientras que las mujeres son mayormente víctimas, por ello, es importante tener presente la diferencia de roles de género y su implicación en los programas de prevención.

There have been several attempts to identify individuals potentially at high risk for psychotic-spectrum disorders using brief screening measures. However, relatively few studies have tested the psychometric properties of the psychosis screening measures in representative samples of adolescents. The main purpose of the present study was to analyse the prevalence, factorial structure, measurement invariance across gender, and reliability of the Youth Psychosis At-Risk Questionnaire - Brief (YPARQ-B) in a community-derived sample of adolescents. Additionally, the relationship between YPARQ-B, depressive symptoms, psychopathology, stress manifestations, and prosocial skills was analysed. One thousand and twenty students from high schools participated in a cross-sectional survey. The YPARQ-B, the Reynolds Adolescent Depression Scale, the Strengths and Difficulties Questionnaire, and the Student Stress Inventory - Stress Manifestations were used. A total of 85.1% of the total sample self-reported at least one subclinical psychotic experience. We observed a total of 10.9% of adolescents with a cutoff score of ≥11 or 6.8% with a cutoff score of ≥13. The analysis of internal structure of the YPARQ-B yielded an essentially unidimensional structure. The YPARQ-B scores showed measurement invariance across gender. The internal consistency of the YPARQ-B total score was 0.94. Furthermore, self-reported subclinical psychotic experiences were associated with depressive symptoms, emotional and behavioural problems, poor prosocial skills, and stress manifestations. These results would appear to indicate that YPARQ-B is a brief and easy tool to assess self-reported subclinical psychotic experiences in adolescents from the general population. The assessment of these experiences in community settings, and its associations with psychopathology, may help us to enhance the possibility of an early identification of adolescents potentially at risk for psychosis and mental health problems.