Table 1.
Mean Percentage Correct, Pr and Br, and Reaction times (±SE) for Tests 1&2 and Tests 3&4 for the Four Age Groups.
| Accuracy, Sensitivity and Response Bias | Reaction Time | ||||||
|---|---|---|---|---|---|---|---|
| Age Group | Test Phase | % Hits | % CRs | Pr | Br* | Hits | CRs |
| Children | Tests 1&2 | 41.4 (3.7) | 80.1 (2.7) | 0.26 (0.04) | .20 (.03) | 725 (41) | 693 (44) |
| Tests 3&4 | 60.8 (5.3) | 88.2 (2.2) | 0.51 (0.06) | .18 (.03) | 710 (43) | 674 (44) | |
| Adolescents | Tests 1&2 | 51.1 (3.1) | 74.8 (3.5) | 0.35 (0.04) | .23 (.04) | 626 (32) | 623 (32) |
| Tests 3&4 | 72.6 (3.2) | 82.7 (3.2) | 0.59 (0.05) | .30 (.03) | 587 (22) | 600 (13) | |
| Young Adults | Tests 1&2 | 66.7 (3.5) | 85.2 (2.6) | 0.54 (0.03) | .30 (.05) | 712 (28) | 754 (25) |
| Tests 3&4 | 92.7 (1.3) | 89.8 (1.5) | 0.83 (0.02) | .56 (.05) | 655 (32) | 688 (23) | |
| Older Adults | Tests 1&2 | 61.4 (5.0) | 70.5 (4.5) | 0.32 (0.04) | .44 (.06) | 979 (39) | 998 (47) |
| Tests 3&4 | 78.0 (4.6) | 80.6 (3.7) | 0.58 (0.04) | .50 (.09) | 895 (35) | 913 (40) | |
Notes. Hits = correctly recognized old items; CRs = correctly rejected new items; Pr (sensitivity) = Phit − Pfalse alarm; Br (response bias) = (Pfalse alarm)/(1 − (Phit − Pfalse alarm));
*
For Br, values < 0.5 = conservative bias; > 0.5 = liberal bias (Snodgrass & Corwin, 1988).