Table 3.
Patients vs Control Comparisons on the Social and Physical Anhdeonia Scales
| Study | Patients | Controls | Questionnaire | Social Anhedonia (Effect Size) | Physical Anhedonia (Effect Size) |
| Chapman et al.48 (USA) | 121 chronic inpatients (100% male) | 241 | SAS, PAS | Patients > controls (0.72) | Patients > controls (0.48) |
| Katsanis et al.81 (USA) | 118 first-episode psychosis (status not specified) (69% male) | 155 | SAS, PAS | Patients > controls (0.95) | Patients > controls (1.03) |
| Grove et al.121 (USA) | 17 chronic inpatient and outpatient (76% male) | 18 | PAS | Patients > controls (1.03) | |
| Berenbaum and Oltmanns80 (USA) | 43 chronic outpatients (51% male) | 20 | SAS, PAS | Patients > controls | Patients > controls |
| Franke et al.91 (Germany) | 19 chronic and first-episode inpatients (gender not reported) | 35 | PAS | Patients > controls (1.98) | |
| Blanchard et al.57 (USA) | 37 chronic outpatients (73% male) | 15 | R-SAS, R-PAS | Patients > controls (1.05) | Patients > controls (0.85) |
| Craver and Pogue-Geile125 (USA) | 39 chronic outpatients (64% male) | 38 | R-SAS | Patients > controls (1.09) | |
| Laurent et al.93 (France) | 23 chronic outpatients (91% male) | 34 | R-SAS, R-PAS | Patients > controls (1.73) | Patients > controls (1.18) |
| Blanchard et al.54 (USA) | 55 chronic inpatients (84% male) | 41 | R-SAS | Patients > controls (0.89) | |
| Schuroff et al.79 (France) | 80 chronic inpatients (53% male) | 94 | R-PAS | Patients > controls (0.53) | |
| Cohen et al.213 (USA) | 73 chronic forensic inpatients (75% male) | 22 | R-SAS, PAS | Patients > controls (0.62) | Patients > controls (0.76) |
| Camisa et al.109 (USA) | 63 chronic outpatients (97% male) | 55 | R-SAS | Patients > controls (1.76) | |
| Horan et al.88 (USA) | 30 chronic outpatients (83% male) | 31 | R-SAS, R-PAS | Patients > controls (1.10) | Patients > controls (1.29) |
| Herbener et al.97 (USA) | 33 chronic outpatients (58% male) | 28 | R-SAS, R-PAS | Patients > controls (0.92) | Patients > controls (0.76) |
| Horan et al. (USA) | 72 recent-onset inpatients (80% male) | 54 | R-PAS | Patients > controls (0.67) |
PAS, Physical Anhedonia Scale; SAS, Social Anhedonia Scale; R-PAS, Revised Physical Anhedonia Scale; R-SAS, Revised Social Anhedonia Scale.