TABLE 3.

Cogmed working memory measures for participants in active control (n = 30) and experimental (n = 27) groups

Cogmed Measure	Active Control	Experimental	Between-Group Comparison
	n = 30	n = 27	df	t/Z	p	Effect Size
Start index; mean (SD, range)	39.04 (3.85, 29.38–40.53)	78.95 (6.79, 65.30–92.54)	55	−6.80	<0.001*	10.37‡
Maximum index; mean (SD, range)	39.16 (3.55, 29.38–40.53)	103.43 (10.67, 86.41–126.88)	55	−6.85	<0.001*	18.10‡
Active training time per session (min)	29.89 (4.92, 17.94–42.34)	40.87 (3.72, 34.40–51.21)	55	9.43	<0.001†	2.52§

*Mann-Whitney U test.

†Student’s t test.

‡Glass’s Δ.

§Cohen’s d.