TABLE 2

Mean (95% CI) Values for Task Performance

MeasureInterventionWait-list
PretestPosttestChangePretestPosttestChange
Flanker task
 Response accuracy (%)
  Congruent trials78.6a (76.3 to 80.9)85.8b (84.0 to 87.5)7.1a (4.7 to 9.6)82.3c (80.2 to 84.5)85.6b (83.5 to 87.6)3.2b (1.0 to 5.5)
  Incongruent trials72.1a (69.8 to 74.5)78.9b (76.9 to 81.0)6.8a (4.2 to 9.5)75.5c (73.5 to 77.6)79.9b (77.5 to 82.2)4.3a (2.0 to 6.7)
  All trials75.4a (73.2 to 77.6)82.4b (80.6 to 84.2)7.0a (4.6 to 9.4)79.0c (77.0 to 81.0)82.7b (80.6 to 84.8)3.8b (1.6 to 5.9)
 RT (ms)
  Congruent trials504.0a (481.8 to 526.3)467.1b (450.9 to 483.3)−36.9a (−54.6 to −19.3)522.2a (501.8 to 542.7)478.1b (459.5 to 496.7)−44.2a (−64.5 to −23.8)
  Incongruent trials531.6a (507.4 to 555.9)502.2b (484.8 to 519.5)−29.5a (−49.7 to −9.2)552.3a (529.9 to 574.7)508.2b (489.0 to 527.5)−44.1a (−66.1 to −22.0)
  All trials517.2a (494.2 to 540.1)483.8b (467.2 to 500.4)−33.3a (−51.9 to −14.7)536.7a (515.5 to 557.8)492.5b (473.7 to 511.2)−44.2a (−65.0 to −23.3)
Switch task
 Response accuracy (%)
  Homogeneous trials87.7a (86.3 to 89.0)89.9b (88.7 to 91.0)2.2a (0.7 to 3.8)87.8a (86.4 to 89.1)90.2b (89.1 to 91.3)2.4a (1.1 to 3.7)
  Heterogeneous trials65.9a (63.2 to 68.6)76.6b (74.3 to 78.9)10.7a (8.2 to 13.3)69.0a (66.6 to 71.4)75.0b (72.6 to 77.4)6.0b (3.3 to 8.6)
 RT (ms)
  Homogeneous trials792.3a (760.5 to 824.2)754.9b (721.2 to 788.7)−37.4a (−70.1 to −4.7)816.8a (786.0 to 847.6)759.5b (730.6 to 788.5)−57.2a (−90.2 to −24.3)
  Heterogeneous trials1385.4a (1328.7 to 1442.1)1407.1a (1362.4 to 1451.9)21.7a (−39.2 to 82.7)1475.4a (1426.8 to 1524.1)1435.1a (1389.2 to 1481.0)−40.4a (−98.9 to 18.1)
  • Values sharing a common superscript are not statistically different at α = 0.05.