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...International journal of clinical and health psychology issn vol n pp rasch modeling the spanish self report version liebowitz social anxiety scale for children adolescents lsas ca sr jose a lopez pina olivares raquel sanchez garcia universidad de murcia espana received september recibido septiembre accepted may aceptado abstract objective this instrumental study was to analyze unidimensional structure subscales fear avoidance under models family sample composed by students male female from elementary high schools aged between years rating model applied goodness fit statistics unweighted mean square weighted showed values near those expected except in items subscale moreover partitioning total two random subgroups persons exhibited that an invariant ordering item ability parameters supports usefulness its determining unidimensionality psychological tests keywords resumen el objetivo este estudio fue analizar la estructura las subescalas miedo y evitacion espanola research supported min...