Table 3.
Means and SDs of Performance Measures for Patients With Schizophrenia and Healthy Controls
| Time 1a | Time 2 | Time 3 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Patient | Control | Patient | Control | Patient | Control | |||||||
| Task | n | M (SD) | n | M (SD) | n | M (SD) | n | M (SD) | n | M (SD) | n | M (SD) |
| DPX | 92 | 2.30 (1.25) | 127 | 3.21 (0.88) | 90 | 2.58 (1.10) | 122 | 3.30 (0.83) | 86 | 2.73 (1.15) | 119 | 3.35 (0.80) |
| AX-CPT | 95 | 2.58 (1.02) | 128 | 3.34 (0.87) | 93 | 2.90 (1.07) | 123 | 3.48 (0.73) | 88 | 2.96 (1.07) | 122 | 3.50 (0.78) |
| CCE | 98 | 128 | 95 | 123 | 94 | 123 | ||||||
| Difference | 6.63 (11.43) | 8.10 (10.64) | 6.63 (12.55) | 8.33 (8.85) | 8.13 (9.09) | 8.65 (9.15) | ||||||
| JOVI | 92 | 130 | 92 | 128 | 94 | 122 | ||||||
| Thresholdb | 1.12 (0.10) | 1.09 (0.07) | 1.10 (0.10) | 1.07 (0.08) | 1.10 (0.10) | 1.06 (0.09) | ||||||
| Proportion correct | 0.69 (0.08) | 0.72 (0.08) | 0.72 (0.09) | 0.76 (0.07) | 0.73 (0.09) | 0.77 (0.09) | ||||||
| RiSE | 96 | 127 | 95 | 123 | 92 | 123 | ||||||
| AR | 0.33 (0.24) | 0.56 (0.20) | 0.32 (0.27) | 0.55 (0.25) | 0.26 (0.28) | 0.52 (0.23) | ||||||
| IRIE | 0.65 (0.26) | 0.84 (0.11) | 0.66 (0.23) | 0.85 (0.11) | 0.70 (0.19) | 0.84 (0.11) | ||||||
| IRAE | 0.61 (0.27) | 0.83 (0.11) | 0.62 (0.22) | 0.82 (0.14) | 0.65 (0.21) | 0.82 (0.13) | ||||||
Note: DPX, Dot Probe Expectancy; AX-CPT, AX continuous performance test; RiSE, Relational and Item-Specific Encoding Task; AR, Associative Recognition; IRIE, Item Recognition, Item Encoding; IRAE, Item Recognition, Relational Encoding; CCE, Contrast-Contrast Effect; JOVI, Jittered Orientation Visual Integration.
aThe time between first and second testing averaged 7.2 days (range 4–14) and between second and third testing averaged 14.4 days (range 10–29).
bThreshold values were transformed to conform to normality (see text). Larger values correspond to worse performance.