Table 3. Stepwise discriminant analysis of the outcome variables of the cognitive tasks.

			Exact F
Step	Entered	Lambda	Statistic	df1	df2	p-value
1	DFT	.919	7.56	1	86	.007
2	SSRT	.862	6.83	2	85	.002
3	TMT B-A	.822	6.06	3	84	.001

Note: at each step, the variables that minimizes the overall Wilks’ lambda is entered. Minimum partial F to enter is 3.84, maximum F to remove is 2.71.