Table 1.
Demographic information, symptom ratings, and oddball task behavioral and ERP results.
| Schizophrenia patients (n = 21) |
Healthy controls (n = 22) |
|||
|---|---|---|---|---|
| Mean | SD | Mean | SD | |
| Age | 46.2 | 10.9 | 41.5 | 7.7 |
| Education* | 12.6 | 1.1 | 14.4 | 1.8 |
| Parental education | 13.7 | 3.3 | 14.2 | 3.0 |
| Male:female | 19:2 | − | 19:3 | − |
| BPRS | ||||
| Total score | 40.1 | 7.6 | ||
| Factors (mean score per item) | ||||
| Positive symptoms | 1.8 | 0.6 | ||
| Negative symptoms | 1.6 | 0.8 | ||
| Depression/anxiety | 1.8 | 0.6 | ||
| Agitation/mania | 1.3 | 0.3 | ||
| Behavioral performance | ||||
| EEG accuracy (% out of 60) | 84.6 | 28.1 | 96.3 | 5.5 |
| fMRI accuracy (% out of 54) | 84.9 | 19.4 | 93.7 | 9.8 |
| EEG d-prime* | 3.97 | 1.40 | 4.79 | 0.62 |
| fMRI d-prime* | 3.71 |
0.97 |
4.44 |
0.78 |
| Number EEG trials accepted | ||||
| Targets | 53.8 | 8.5 | 51.5 | 12.4 |
| Nontargets | 390.7 |
63.5 |
375.3 |
93.4 |
| P300 amplitude (µV) | ||||
| Targets* | 2.36 | 1.34 | 4.40 | 2.37 |
| Nontargets | 1.27 | 1.20 | 1.71 | 0.95 |
*
p < 0.05 difference between groups.