TABLE 5.

Summary of hierarchical linear regression analysis for variables predicting gains in tasks.

	Training gains in Go-nogo task		Training gains in ANT task		Training gains in DCCS task		Training gains in backward digit span task
	△R2	β	△R2	β	△R2	β	△R2	β
Step1	0.588***		0.532***		0.428***		0.089*
Pre-test		−0.764***		−8.572***		−0.674***		−0.332*
Step2	0.074**		0.072**		0.107**		0.088*
Group		0.273**		0.269**		0.328**		0.298*
R2	0.662		0.605		0.536		0.177
F	55.736***		43.586**		32.868***		6.128**

β is based on the final regression model with all predictors. *Significant at α < 0.05; **Significant at α < 0.01; ***Significant at α < 0.001.