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Title: Development and validation of the Adolescent Psychotherapy Q-set (APQ)
Author: Calderon, A.
ISNI:       0000 0004 8502 0050
Awarding Body: University College London
Current Institution: University College London (University of London)
Date of Award: 2014
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There is a gap in current knowledge of the processes that take place in psychotherapy with adolescents, which might be due in part to the paucity of instruments designed to quantify adolescent psychotherapy process (Bychkova, Hillman, Midgley, & Schneider, 2011). This thesis reports the development and validation of the Adolescent Psychotherapy Q-set (APQ), which aims at reducing that gap by describing the psychotherapy process in young people's treatments in a form suitable for quantitative comparison and analysis. The APQ provides three perspectives, on (1) the young person's emotional states, attitudes, and behaviour; (2) the therapist's actions and attitudes; and (3) the nature of the interaction of the dyad. Data for the validation study is derived from a randomised controlled trial (IMPACT study) that compares the efficacy of Short-Term Psychoanalytic Psychotherapy (STPP) and Cognitive-Behavioural Therapy (CBT) for moderate to severe depressed adolescents. The validation was conducted with the ratings of seventy audio-recorded psychotherapy sessions with a range of therapists, patients, and treatment stages, from two therapeutic approaches (STPP and CBT). Data analysis included intraclass correlation coefficients, cluster analysis, Q-factor analysis, and parametric and non-parametric correlations and comparisons of group means. Results suggest that the APQ is a valid and reliable instrument: despite being pan-theoretical, it captures differences between therapeutic techniques (STPP, CBT); has the capacity to distinguish between excellent, moderate, and poor levels of therapeutic alliance; and shows good levels of interrater reliability. This thesis also provides results that show that the psychotherapy process of the sessions studied was influenced by the young person's engagement. The APQ will contribute to new ways of thinking about the mechanisms of therapeutic change and to unravel the psychotherapeutic processes that lead to young people's change.
Supervisor: Target, M. ; Midgley, N. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available