Aptitude-treatment interaction effects in psychooncological interventions
Niklaus Stulz1, Alfred Künzler2, Jürgen Barth3
1Psychiatric Services Aargau AG & Department of Psychology, University of Berne.
Objective:
To examine aptitude-treatment interaction (ATI) effects in cancer patients receiving psychooncological interventions (POIs).
Method:
N=36 cancer patients were treated with POI. Hierarchical linear regression was used to test two interaction effects between patient baseline characteristics (aptitudes) and process analyses of therapy sessions (treatment) on change in mental health during POI.
Results:
Patients with high emotional distress did best when their therapy reduced arousal, and patients with lower emotional distress benefited most if therapists emphasized arousal induction. The interaction between the coping style of the patient (internalizing vs. externalizing) and the focus of the treatment (emotion vs. behavior) did not predict POI outcomes.
Conclusions:
The ATI effect of patient's distress and therapist's arousal induction/reduction may help therapists to make differential treatment decisions in POI. Tailoring treatments to cancer patients based on their personal characteristics may enhance the effectiveness of POI.
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