title: [A group therapy assessment tool (GrETha-Q)].
abstract: This paper presents a questionnaire designed to assess the aspecific treatment efficacy and subjective perceived efficacy of group therapy. A preliminary version of the instrument was administered to a sample of 151 subjects undergoing group therapy. The psychometric properties of the instrument were evaluated by means of the Rasch model, and showed a good score range, good reproducibility and adequate coherence. The hierarchy of difficulty of the items remained stable among the respective categories of sex, age and professional level.
authors.affiliation: Servizio di Psicologia, Fondazione Salvatore Maugeri, Clinica del Lavoro e della Riabilitazione, IRCCS, Istituto Scientifico di Pavia, Italy. igiorgi@fsm.it
authors.forename: I
authors.initials: I
authors.lastname: Giorgi
authors.forename: C
authors.initials: C
authors.lastname: Sguazzin
authors.forename: P
authors.initials: P
authors.lastname: Baiardi
authors.forename: A
authors.initials: A
authors.lastname: Simone
authors.forename: L
authors.initials: L
authors.lastname: Tesio
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D011594:Psychometrics; D011615:Psychotherapy, Group; D011795:Surveys and Questionnaires