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Título

Spanish validation of the self-evaluation of negative symptoms scale SNS in an adolescent population

AutorRodríguez-Testal, Juan F. CSIC ORCID CVN; Perona-Garcelán, Salvador CSIC ORCID CVN; Dollfus, Sonia; Valdés-Díaz, María; García-Martínez, Jesús; Ruiz‐Veguilla, Miguel CSIC ORCID; Senín-Calderón, Cristina
Fecha de publicación2019
EditorBioMed Central
CitaciónBMC Psychiatry 19: 327 (2019)
Resumen[Background]: Negative symptoms (NS) may be observed in the general population in an attenuated form and in high-risk mental states. However, they have been less studied in the general population than positive symptoms, in spite of their importance at the insidious onset of schizophrenia and their appearance before positive symptoms. This study aimed to analyze the empirical structure of the Spanish version of the Self-Evaluation of Negative Symptoms (SNS) Scale and find its psychometric properties and invariance of measurement across sex and age in a sample of adolescents.
[Methods]: The sample consisted of 4521 adolescents (53.6% female) from 11 to 18 years of age.
[Results]: Confirmatory Factor Analysis of the SNS confirmed an internal structure of five first-order factors by the characteristic dimensions of NS: avolition, social withdrawal, diminished emotional range, anhedonia, alogia, and one second-order factor which includes the total NS score. Multi-group confirmatory factor analysis showed that the scale was invariant across sex and age. Total scale reliability was adequate. A strong relationship was found between the SNS with depressive symptomatology, moderate with ideas of reference and low with aberrant salience. Conclusion: The results back use of the Spanish version of the SNS scale for detection of NS in the general population of adolescents.
Versión del editorhttps://doi.org/10.1186/s12888-019-2314-1
URIhttp://hdl.handle.net/10261/212438
DOI10.1186/s12888-019-2314-1
E-ISSN1471-244X
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