Table 1.
Mean (SD) d′, accurate reaction time (ms) and the effect sizes (hedges’ g) of 2‐back and 3‐back after different stimulation conditions
| 2‐back | 3‐back | |||||||
|---|---|---|---|---|---|---|---|---|
| BL | T15 | Z (p) | Hedges’ g (95% CI) | BL | T15 | Z (p) | Hedges’ g (95% CI) | |
| d′ (SD) | ||||||||
| 50% | 3.53 (0.95) | 3.59 (1.09) | 0.078 (0.937) | 0.06 (–0.65 0.78) | 2.57 (1.24) | 2.72 (1.39) | 1.161 (0.245) | 0.11 (–0.61 0.83) |
| 75% | 3.34 (0.96) | 3.49 (1.04) | 0.848 (0.397) | 0.14 (–0.57 0.86) | 2.67 (1.18) | 2.75 (1.20) | 0.094 (0.925) | 0.07 (–0.65 0.75) |
| 100% | 3.47 (1.21) | 3.58 (0.96) | 0.471 (0.638) | 0.09 (–0.62 0.81) | 2.62 (1.15) | 2.86 (1.30) | 0.909 (0.363) | 0.19 (–0.53 0.91) |
| Friedman's Anova |
x 2 = 0.441, p = .802 |
x 2 = 1.458, p = .482 |
||||||
|
Reactiontime (SD) |
||||||||
| 50% | 537.07 (136.31) | 524.78 (131.21) | −1.420 (0.156) | −0.09 (–0.81 0.63) | 583.67 (159.92) | 575.22 (146.42) | −0.454 (0.650) | −0.05 (–0.77 0.66) |
| 75% | 521.74 (104.68) | 518.81 (121.44) | 0.000 (1.000) | −0.03 (–0.74 0.69) | 561.35 (117.92) | 517.01 (87.14) | −2.158 (0.031)a | −0.42 (–1.14 0.31) |
| 100% | 487.26 (104.79) | 514.59 (80.28) | 1.022 (0.307) | 0.28 (–0.43 1.00) | 538.80 (146.16) | 520.09 (108.04) | 0.000 (1.000) | −0.14 (–0.86 0.57) |
|
Friedman's Anova |
x 2 = 2.678, p = .262 |
x 2 = 1.458, p = .482 |
||||||
a
indicates significant difference (p < .05).