Evidence of validity of the LSB-50: Cross-Validation, Factorial Invariance and external criterion analysis

DELA IGLESIA, GUADALUPE; ALEJANDRO CASTRO SOLANO; FERNANDEZ LIPORACE, M.

Ciencias Psicologicas

Prensa Medica Latinoamericana

Lugar: Montevideo; Año: 2016 vol. 10 p. 63 - 73

This paper aims at obtaining evidence of validity of the LSB-50 (de Rivera & Abuín, 2012), a screening measure of psychopathology, in Argentinean adolescents. The sample consisted of 1002 individuals (49.7% males; 50.3% females) between 12 and 18 years-old (M = 14.98; SD = 1.99). A cross-validation study and factorial invariance studies were performed to test, in samples divided by sex and age, if a seven-factor structure that corresponds to seven clinical scales (Hypersensitivity, Obsessive-Compulsive, Anxiety, Hostility, Somatization, Depression, and Sleep disturbance) was adequate for the LSB-50. The seven-factor structure showed a good fit in all the subsamples. Next, the fit of the seven-factor structure was studied simultaneously in the aforementioned subsamples, through hierarchical models that imposed different constrains of equivalency. Results indicated the invariance of the seven clinical dimensions of the LSB-50. Ordinal alphas showed good internal consistency for all the scales. Finally, correlations with a diagnostic measure of psychopathology (PAI-A) indicated moderate convergence. It is concluded that the analyses performed provide robust evidence of construct validity for the LSB-50.