Table 2.
Behavioral data
| Percent correct |
Trials to criteriona |
Response time (ms) |
Percentage of missed RT deadline trialsb |
|||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Probability condition | 80% | 100% | 80% | 100% | 50% | 80% | 100% | 50% | 80% | 100% |
| Comparison subjects Mean | 70.8 | 82.5 | 26.1 | 14.5 | 572.9 | 562.1 | 555.2 | 3.4 | 2.9 | 2.0 |
| S. D. | 9.3 | 10.1 | 7.0 | 5.0 | 80.8 | 70.9 | 75.9 | 3.3 | 3.3 | 2.2 |
| Schizophrenia patients Mean | 71.0 | 77.6 | 24.2 | 18.5 | 614.2 | 603.6 | 594.1 | 6.8 | 5.1 | 4.4 |
| S. D. | 12.7 | 15.0 | 6.9 | 6.6 | 91.8 | 85.9 | 80.1 | 5.0 | 3.9 | 3.7 |
| t value | .05 | -1.41 | -1.00 | 2.50 | 1.74 | 1.92 | 1.81 | 2.89 | 2.16 | 2.95 |
| P value | .96 | .17 | .32 | .02 | .09 | .06 | .08 | .006 | .04 | .005 |
a
Computed as the percentage of the total number of trials of the condition completed before learning threshold (defined in the text) was achieved. Trials on which no response occurred within the RT limit were omitted from threshold determinations.
b
Includes trials in which a response occurred after the 1100 ms deadline and trials on which there was no response.
S. D.: Standard deviation.