Table 3.

Mean (SD) HbO responses for the young and old age groups of Experiment 2.

		Young (4–6 months)	Old (10–12 months)
Region I	M (SD)	0.0271 (0.0358)	0.0132 (0.0527)
	t (df)	3.211 (17)	1.002 (15)
	p-value	0.005**	0.332
	Cohen's d	1.065	0.354
Region II	M (SD)	0.0250 (0.0450)	0.0078 (0.0282)
	t (df)	2.135 (17)	1.111 (15)
	p-value	0.048	0.284
	Cohen's d	0.71	0.391
Region III	M (SD)	0.0150 (0.0312)	−0.0016 (0.0255)
	t (df)	2.038 (17)	−0.252 (15)
	p-value	0.057	0.804
	Cohen's d	0.68	0.089

One sample t-tests were used to compare mean responses at each of the three ROIs to zero. One-tailed p-values that passed the Benjamini and Hochberg (1995) test are indicated by asterisks: ^*p < 0.05;

^**p < 0.01;

^***p < 0.001. Effect sizes as measured by Cohen's d are also reported Cohen (1988).