%0 Journal Article
%T Direct retrospective measurement of therapeutic changes: an example using the Czech version of the Questionnaire of Personal Changes (Q-PC).
%A Řiháček T
%A Macková K
%A Cígler H
%J Psychother Res
%V 0
%N 0
%D 2024 Jul 8
%M 38976630
%F 4.117
%R 10.1080/10503307.2024.2370357
%X <B>UNASSIGNED: </B>The study aimed to test the psychometric properties of the Czech translation of the Questionnaire of Personal Changes (Q-PC), a measure designed for retrospective (direct) measurement of change in psychotherapy.<BR><B>UNASSIGNED: </B>A sample of group psychotherapy clients (N = 222) and a nonclinical sample (N = 167) sample were used. Clients in the clinical sample were administered the Q-PC in addition to several pre-post outcome measures. Confirmatory factor analysis, correlational analysis, and structural equation modeling were used to test the Q-PC's factor structure, longitudinal measurement invariance, reliability, convergent validity, sensitivity to change, and other psychometric properties.<BR><B>UNASSIGNED: </B>The Q-PC demonstrated a unidimensional structure that was strictly invariant between two follow-up measurement waves. The measure also demonstrated excellent reliability and sensitivity to change and good convergent validity. Furthermore, it demonstrated a similar relationship to baseline severity as the pre-post outcome measures.<BR><B>UNASSIGNED: </B>The retrospective measurement of change is a promising approach that has the potential to complement the traditional pre-post measurement of change.