Reliability and Validity of the Snaith-Hamilton Pleasure Scale Clinician Administered Turkish Form

Anhedonia, which is defined as diminished capacity of having pleasure, is a common symptom in many mental disorders. It has been aimed in this study to adapt to the Turkish language the Snaith- Hamilton Pleasure Scale Clinician Administered Form (SHAPS-C) and examining reliability and validity of Snaith-Hamilton Pleasure Scale Clinician Administered Turkish Form (SHAPS-C-TR) which measures anhedonia in clinical and healthy samples.

Two groups consisting of 63 participants consulting the psychiatry clinic and 67 non-clinical participants were included in the study. Data were collected with the Turkish version of the SHAPS-C (the SHAPS-C-TR), the Beck Depression Inventory (BDI), the Montgomery-Asberg Depression Rating Scale (MADRS) and the Positive Negative Affect Scale (PANAS).

The Kuder-Richardson internal consistency coefficient for the entire participants, the clinical and the non-clinical group were, 0.765, 0.813 and 0.657 respectively. The intra-class coefficient for test-retest reliability was 0.732. The total score on the SHAPS-C-TR significantly correlated with the scores on the anhedonia items of the BDI and the MADRS but not the scores on anxiety items. The PANAS positive symptoms scores were negatively correlated with the SHAPSC- TR total score. In the clinical group, the participants followed up with depression had significantly higher SHAPS-C-TR score than the rest of the participants. A similar difference was not demonstrated by the scores of the clinical group participants followed up with anxiety disorder. Scores on the SHAPS-C-TR did not vary with respect to the demographic characteristics of the participants.

The SHAPS-C-TR is a valid and reliable measurement tool to assess anhedonia in both clinical and non-clinical individuals irrespective of differences in demographic features.