Table 1.
Scores and statistical analyses of the behavioral performance during the Go/NoGo tasks.
| Mean (SD) | Immediate effect | Practice effects | |||||
|---|---|---|---|---|---|---|---|
| SI | II | SI vs II (t30; p-value; Cohen’s d) | Group (SI; II) (F1,30; p-value; ηp2) | Session (BEG; END) (F1,30; p-value; ηp2) | Group x Session (F1,30; p-value; ηp2) | ||
| Response Time (ms) | BEG | 337.1 (29.9) | 357.5 (30.6) | −1.90; 0.068; 0.70 | 7.65; 0.010; 0.20 | 10.83; 0.003; 0.27 | 3.75; 0.062; 0.11 |
| END | 308.9 (36.1) | 350.1 (41.5) | |||||
| False Alarms Rate (%) | BEG | 23.1 (11.3) | 15.8 (6.8) | 2.26; 0.031; 0.82 | 5.39; 0.027; 0.15 | 2.83; 0.103; 0.09 | 1.02; 0.321; 0.03 |
| END | 28.4 (19.4) | 17.1 (10.6) | |||||
| D prime | BEG | 2.8 (0.6) | 3.0 (0.5) | −1.37; 0.181; 0.50 | 3.16; 0.086; 0.10 | 3.95; 0.056; 0.12 | 0.90; 0.351; 0.03 |
| END | 2.4 (0.9) | 2.9 (0.8) | |||||
| C Criterion | BEG | −0.6 (0.2) | −0.5 (0.1) | −2.25; 0.032; 0.82 | 5.32; 0.028; 0.15 | 1.46; 0.237; 0.05 | 0.22; 0.646; 0.01 |
| END | −0.6 (0.3) | −0.4 (0.3) | |||||
Note. SI = control group receiving standard instructions and II = implementation intentions group. We tested for normality of all variables using a Kolmogorov-Smirnov test, which indicated that the data were normally distributed in both groups and for all conditions.