Table 4.

Within group changes in n-back performance by group and load

Controls (n=12)	Mean (SD)	t (Df)	Sig (2-tailed)
0-back	0.47 (7.89)	0.20 (11)	0.839
1-back	−13.07 (13.55)	−3.34 (11)	0.007
2-back	−6.42 (12.24)	−1.82 (11)	0.096
3-back	−4.65 (8.56)	−1.88 (11)	0.086
All	−5.91 (6.39)	−3.20 (11)	0.008
Cases (n=13)
0-back	−0.85 (6.74)	−0.42 (10)	0.682
1-back	0.48 (6.40)	0.25 (10)	0.808
2-back	−3.35 (4.97)	−2.23 (10)	0.049
3-back	0.77 (10.08)	0.25 (10)	0.805
All	−0.74 (3.73)	−0.66 (10)	0.526