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Fonseca-Pedrero E.,University of La Rioja | Fonseca-Pedrero E.,Center for Biomedical Research in the Mental Health Network | Gooding D.C.,University of Wisconsin - Madison | Ortuno-Sierra J.,University of La Rioja | Paino M.,University of Oviedo
Comprehensive Psychiatry | Year: 2016

Background The reliable early identification of individuals at risk for psychosis requires well-validated screening measures. To date, there is little information about the psychometric properties of the screening measures for psychosis risk in nonclinical adolescents. The main purpose of the present study was to validate the Prodromal Questionnaire-Brief (PQ-B) in a community sample of non-clinical Spanish adolescents. We also analyzed the prevalence, factorial validity, and reliability of the PQ-B scores as well as the relationship between self-reported clinical high risk symptoms and schizotypal traits. Method Four hundred and forty-nine high-school students participated in a cross-sectional survey. The PQ-B and the Oviedo Schizotypy Assessment Questionnaire (ESQUIZO-Q) were used. Results Although 85.1% of the total sample reported at least one clinical high risk symptom, only 16% of the adolescents scored above the standardized cut-off. The PQ-B revealed an essentially unidimensional structure. The internal consistency of the PQ-B total score was 0.93. Pearson correlation coefficients indicated a high degree of overlap between self-reported clinical high risk symptoms and Positive and Disorganized schizotypal traits. A Canonical correlation between the PQ-B total score and ESQUIZO-Q dimensions showed that the associated variance between both sets of variables was 45.4% (adjusted R2 = 0.45). Conclusions The PQ-B is a brief, easy, and reliable tool for screening self-reported clinical high risk symptoms in adolescents from the general population. These results also indicated that self-reported clinical high risk symptoms and schizotypal traits are closely associated at the subclinical level. The assessment of psychosis risk symptoms and their relationship with other distal risk factors, in a close-in strategy, may enhance the early identification of individuals at heightened risk for psychosis spectrum disorders. © 2015 Elsevier Inc. Source


Gooding D.C.,University of Wisconsin - Madison | Pflum M.J.,University of Wisconsin - Madison | Fonseca-Pedero E.,University of La Rioja | Fonseca-Pedero E.,Center for Biomedical Research in the Mental Health Network | Paino M.,University of Oviedo
European Psychiatry | Year: 2016

To date, nearly all self-report measures of anhedonia have been developed for use with adult samples. A valid measure of anhedonia that can be used with adolescents would be useful in order to address key questions about the nature and course of anhedonia during adolescence. This study examined the psychometric properties of an adolescent version of a relatively new measure of social anhedonia, namely, the Anticipatory and Consummatory Interpersonal Pleasure Scale (ACIPS-A). The ACIPS-A was administered to a general, community-derived Spanish adolescent sample of 449 students, including 251 males (55.9%), who ranged in age from 13 to 19 years old. Other measures included the Temporal Experience of Pleasure Scale (TEPS), anhedonia subscales from the Oviedo Schizotypy Assessment Questionnaire (ESQUIZO-Q), and the General Health Questionnaire-12 (GHQ-12). Exploratory factor analysis yielded a four-factor solution (close relationships, casual friendships and relationships, social bonding, and negative affiliation/emancipation). The total ACIPS-A showed excellent internal consistency, with ordinal alpha = 0.95. The ACIPS-A total scores were positively correlated with the TEPS-Anticipatory scores (r = 0.44, P < 0.001) and TEPS-Consummatory scores (r = 0.30, P < 0.001) but not with total GHQ-12 scores. The ACIPS-A total scores were negatively correlated with social anhedonia subscale scores (r = −0.55) taken from a measure developed for use with adolescents. These results suggest that the ACIPS-A is a valid measure for use with non-clinical adolescents and is likely to prove useful for screening purposes. © 2016 Elsevier Masson SAS Source


Ortuno-Sierra J.,University of La Rioja | Fonseca-Pedrero E.,University of La Rioja | Paino M.,University of Oviedo | Sastre I Riba S.,University of La Rioja | And 2 more authors.
Journal of Adolescence | Year: 2015

The main purpose of the present study was to test the psychometric properties of the Strength and Difficulties Questionnaire (SDQ), self-reported version, in Spanish adolescents, introducing a five-point Likert response scale. The sample consisted of 1474 adolescents with a mean age of 15.92 years (SD=1.18). The level of internal consistency of the SDQ Total score was.75, ranging from.56 to.71 for the subscales. Results from exploratory factor analysis revealed a three-factor structure as the most satisfactory. Confirmatory factor analyses showed that the five-factor model (with modifications) displayed better goodness of-fit indices than the other hypothetical dimensional models tested. Furthermore, strong measurement invariance by age and partial measurement invariance by gender was supported. The study of the psychometric properties confirms that the Spanish version of the SDQ, self-reported form, is a useful tool for the screening of emotional and behavioural problems in adolescents. © 2014 The Foundation for Professionals in Services for Adolescents. Source


Fonseca-Pedrero E.,University of La Rioja | Fonseca-Pedrero E.,Center for Biomedical Research in the Mental Health Network | Menendez L.F.,University of Oviedo | Paino M.,University of Oviedo | And 5 more authors.
PLoS ONE | Year: 2013

Background:Schizotypal traits in adolescents from the general population represent the behavioral expression of liability for psychotic disorders. Schizotypy assessment in this sector of population has advanced considerably in the last few years; however, it is necessary to incorporate recent advances in psychological and educational measurement.Objective:The main goal of this study was to develop a Computerized Adaptive Test (CAT) to evaluate schizotypy through "The Oviedo Questionnaire for Schizotypy Assessment" (ESQUIZO-Q), in non-clinical adolescents.Methods:The final sample consisted of 3,056 participants, 1,469 males, with a mean age of 15.9 years (SD = 1.2).Results:The results indicated that the ESQUIZO-Q scores presented adequate psychometric properties under both Classical Test Theory and Item Response Theory. The Information Function estimated using the Gradual Response Model indicated that the item pool effectively assesses schizotypy at the high end of the latent trait. The correlation between the CAT total scores and the paper-and-pencil test was 0.92. The mean number of presented items in the CAT with the standard error fixed at ≤0.30 was of 34 items.Conclusion:The CAT showed adequate psychometric properties for schizotypy assessment in the general adolescent population. The ESQUIZO-Q adaptive version could be used as a screening method for the detection of adolescents at risk for psychosis in both educational and mental health settings. © 2013 Fonseca-Pedrero et al. Source


Ortuno-Sierra J.,University of La Rioja | Badoud D.,University of Geneva | Knecht F.,University of Geneva | Paino M.,Center for Biomedical Research in the Mental Health Network | And 6 more authors.
PLoS ONE | Year: 2013

Background: Schizotypy is a complex construct intimately related to psychosis. Empirical evidence indicates that participants with high scores on schizotypal self-report are at a heightened risk for the later development of psychotic disorders. Schizotypal experiences represent the behavioural expression of liability for psychotic disorders. Previous factorial studies have shown that schizotypy is a multidimensional construct similar to that found in patients with schizophrenia. Specifically, using the Schizotypal Personality Questionnaire-Brief (SPQ-B), the three-dimensional model has been widely replicated. However, there has been no in-depth investigation of whether the dimensional structure underlying the SPQ-B scores is invariant across countries. Methods: The main goal of this study was to examine the measurement invariance of the SPQ-B scores across Spanish and Swiss adolescents. The final sample was made up of 261 Spanish participants (51.7% men; M = 16.04 years) and 241 Swiss participants (52.3% men; M = 15.94 years). Results: The results indicated that Raine et al.'s three-factor model presented adequate goodness-of-fit indices. Moreover, the results supported the measurement invariance (configural and partial strong invariance) of the SPQ-B scores across the two samples. Spanish participants scored higher on Interpersonal dimension than Swiss when latent means were compared. Discussion: The study of measurement equivalence across countries provides preliminary evidence for the Raine et al.'s three-factor model and of the cross-cultural validity of the SPQ-B scores in adolescent population. Future studies should continue to examine the measurement invariance of the schizotypy and psychosis-risk syndromes across cultures. © 2013 Ortuño-Sierra et al. Source

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