Table IV.

Parameter gain, according to the fitted Gaussian function, compared between the three conditions of the Stroop task†

Position	Chromophore	Average gain mean ± S.D. (nM)			Statistical analysis
		Neutral	Congruent	Incongruent	Repeated measuresa	Incongruent vs. congruentb	Incongruent vs. neutralb
F3	Oxy‐Hb	128.8 ± 112	145.3 ± 86	168.6 ± 131	‡	NS	*
	Deoxy‐Hb	−48.1 ± 42	−38.1 ± 44	−54.1 ± 55	NS	*	NS
F4	Oxy‐Hb	137.2 ± 162	128.6 ± 97	149.1 ± 137	NS	NS	NS
	Deoxy‐Hb	−57.2 ± 61	−51.2 ± 59	−69.2 ± 64	‡	*	‡
FC3	Oxy‐Hb	104 ± 89	135.7 ± 98	148.4 ± 103	*	NS	**
	Deoxy‐Hb	−48.3 ± 29	−55.1 ± 47	−62.7 ± 40	NS	NS	‡
FC4	Oxy‐Hb	120.4 ± 73	138 ± 84	150.4 ± 78	NS	NS	‡
	Deoxy‐Hb	−55.5 ± 29	−58.2 ± 35	−74.1 ± 36	*	*	**

^†n = 14. NS, not significant; Hb, hemoglobin.

^aANOVA, df = 2.

^bPaired students t‐test, one‐tailed; df = 13.

^* P < 0.05;

^** P < 0.01;

^‡ P < 0.1 (trend).