Table 3. Means (standard deviations), t-values, effect sizes, and % improvement of all 37 BIT participants.
| Measure | Pre | Post | t (df) | p | Cohen’s d | % |
|---|---|---|---|---|---|---|
| SI-R Total | 60.95 (10.94) | 46.26 (16.65) | 5.51 (36) | .001 | 1.84 | 24% |
| SI-R Clutter | 25.52 (5.50) | 20.68 (9.46) | 4.22 (36) | .001 | 1.41 | 19% |
| SI-R Discarding | 19.75 (3.59) | 14.77 (5.02) | 5.16 (36) | .001 | 1.72 | 25% |
| SI-R Acquiring | 15.68 (5.89) | 10.81 (5.20) | 5.37 (36) | .001 | 1.79 | 31% |
| HRS | 22.95 (5.04) | 16.73 (6.65) | 8.06 (36) | .001 | 2.69 | 27% |
| CIR Assessor | 3.45 (1.31) | 3.00 (1.35) | 4.09 (36) | .001 | 1.36 | 13% |
| CIR Client | 3.72 (1.40) | 3.33 (1.36) | 2.67 (36) | .02 | 0.89 | 10% |
| ADL Total | 1.85 (0.63) | 1.59 (0.50) | 2.71 (36) | .01 | 0.90 | 14% |
| SCI Total | 102.38 (26.88) | 79.71 (32.17) | 5.00 (36) | .001 | 1.67 | 22% |
| SCI Responsibility | 25.45 (7.45) | 19.00 (8.13) | 4.76 (36) | .001 | 1.59 | 25% |
| SCI Memory | 23.46 (6.21) | 16.62 (8.61) | 5.55 (36) | .001 | 1.85 | 29% |
| SCI Emot Attach | 38.22 (14.57) | 29.82 (15.03) | 3.72 (36) | .001 | 1.24 | 22% |
| SCI Control | 15.24 (5.08) | 14.27 (5.52) | 1.54 (36) | ns | 0.51 | 6% |
ADL, Activities of Daily Living; CIR, Clutter Image Rating; HRS, Hoarding Rating Scale; SCI, Saving Cognitions Inventory; SI-R, Saving Inventory-Revised