Table 3.
Performance on Categories 1 and 2 on the Penn Conditional Exclusion Test (PCET)
| Probands | Relatives | |||||||
|---|---|---|---|---|---|---|---|---|
| HC | SZ | SzAff | BP | SZ | SzAff | BP | ||
| Category 1 | ||||||||
| Percent completing category | 89.6 | 75.4 | 84.0 | 88.1 | 86.7 | 87.3 | 91.5 | |
| Category 2 | ||||||||
| General (never reinforced) errors (in Category 2) | Mean (SD) | 0.64 (1.74) | 1.02 (2.32) | 0.64 (1.29) | 0.83 (2.12) | 0.81 (2.06) | 0.68 (2.86) | 0.48 (1.12) |
| Prior to set acquisition: perseverative errors | Mean (SD) | 2.16 (3.28) | 3.05 (3.56) | 2.66 (3.33) | 2.46 (2.92) | 2.34 (2.35) | 2.21 (2.23) | 2.17 (2.06) |
| After set acquisition: regressive errors | Mean (SD) | 1.73 (3.78) | 3.86 (6.42) | 4.30 (6.47) | 2.93 (4.79) | 3.18 (5.04) | 2.39 (4.35) | 2.22 (4.01) |
Note: Regressive errors in Category 2 were elevated in all proband groups and relatives of schizophrenia patients. Note that rate of perseverative errors was not different from controls in any proband or first-degree relative group.