TY - JOUR A1 - Gensthaler, Angelika A1 - Dieter, Julia A1 - Raisig, Susanne A1 - Hartmann, Boris A1 - Ligges, Marc A1 - Kaess, Michael A1 - Freitag, Christine M. A1 - Schwenck, Christina T1 - Evaluation of a novel p-rated scale for selective mutism T2 - Assessment N2 - Assessment of selective mutism (SM) is hampered by the lack of diagnostic measures. The Frankfurt Scale of Selective Mutism was developed for kindergarteners, schoolchildren, and adolescents, including the diagnostic scale (DS) and the severity scale (SS). The objective of this study was to evaluate this novel, parent-rated questionnaire among individuals aged 3 to 18 years (n = 334) with SM, social phobia, internalizing disorders, and a control group. Item analysis resulted in high item-total correlations, and internal consistency in both scales was excellent with Cronbach’s α = .90-.98. Exploratory factor analysis of the SS consistently yielded a one-factor solution. Mean sum scores of the DS differed significantly between the diagnostic groups, and the receiver operating characteristic analysis resulted in optimal cutoffs for distinguishing SM from all other groups with the area under the curves of 0.94-1.00. The SS sum scores correlated significantly with SM’s clinician-rated symptom severity. KW - selective mutism, KW - measure development/validation KW - psychometric properties KW - reliability KW - validity Y1 - 2018 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/54322 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-543225 SN - 1073-1911 VL - 27 IS - 5 SP - 1007 EP - 1015 PB - SAGE Publications CY - London [u.a.] ER -