Table 2.
Descriptive statistics of behavioral responses in the recognition memory task
| Response category | Hits | CR | FA | Miss |
|---|---|---|---|---|
| Placebo: % of responsesa | 53.59 (3.1) | 61.71 (2.7) | 38.54 (2.9) | 46.84 (3.3) |
| Haloperidol: % of responsesa | 59.15 (2.0) | 65.58 (2.5) | 35.12 (2.6) | 40.34 (2.0) |
| Placebo: mean confidenceb | 1.89 (0.06) | 1.73 (0.07) | 1.58 (0.06) | 1.59 (0.07) |
| Haloperidol: mean confidenceb | 1.99 (0.05) | 1.80 (0.04) | 1.56 (0.05) | 1.65 (0.05) |
| Placebo: mean pleasantnessc | 63.34 (2.3) | 57.66 (3.1) | 55.33 (2.2) | 54.15 (2.9) |
| Haloperidol: mean pleasantnessc | 63.74 (2.3) | 55.79 (2.6) | 52.76 (2.2) | 51.51 (2.5) |
| Placebo: mean RTd (s) | 2.12 (0.09) | 2.17 (0.06) | 2.15 (0.08) | 2.16 (0.07) |
| Haloperidol: mean RTd (s) | 1.98 (0.08) | 2.06 (0.08) | 2.05 (0.08) | 2.07 (0.08) |
Numbers within parentheses denote the standard error. Confidence: 1 = low, 3 = high; pleasantness: 1 = low, 100 = high.
a Hit/CR/FA/miss rates: significant group × accuracy interaction: F(1,52) = 6.19, p = 0.02; but no significant group differences for individual rates (all p > 0.10)
b Confidence: main effect of group: F(1,52) = 0.64, p = 0.43; group × old/new rating × accuracy interaction: F(1, 52) = 2.98 (p = 0.09)
c Pleasantness: main effect of group: t(52) = 0.48, p = 0.64; all group × condition interactions (p > 0.20)
d RT: main effect of group: t(52) = 1.16, p = 0.25; all group × condition interactions (p > 0.15)