Table 6.

Internal Consistency Reliabilities of RTs (Ns in parentheses) for the Classic Stroop Task

Coefficient	Splita	Incongruent	Congruent	Difference
αtrial	1/2/3/4/5/6/ 7/8/9/10/11/12	.76 (81)	.61 (132)	.21 (68)
αsplit half	1,3,5,7,9,11 / 2,4,6,8,10,12	.73 (155)	.61 (156)	.40 (155)
αsplit half	1,2,5,6,9,10 / 3,4,7,8,11,12	.73 (156)	.59 (156)	.38 (156)
αsplit half	1,2,3,7,8,9 / 4,5,6,10,11,12	.75 (156)	.56 (156)	.34 (156)
αsplit half	1,2,3,4,5,6 / 7,8,9,10,11,12	.67 (155)	.54 (156)	.14 (155)
αsplit third	1,4,7,10 / 2,5,8,11 / 3,6,9,12	.71 (153)	.63 (156)	.36 (153)
αsplit third	1,2,7,8 / 3,4,9,10 / 5,6,11,12	.74 (154)	.57 (156)	.33 (154)
αsplit third	1,2,3,4 / 5,6,7,8 / 9,10,11,12	.70 (155)	.57 (156)	.23 (155)

Note. Reliabilities were based on a sample of 156 children. For the congruent condition, 146 children responded correctly to 100% of the trials, and 10 children responded correctly to at least 83% but less than 100% of the trials. For the incongruent conditions, 83 children responded correctly to 100% of the trials; 64 children responded correctly to at least 83%, but less than 100% of the trials; and 9 children responded correctly to at least 58%, but less than 83% of the trials.

^aCommas are used to separate trials within a split, and slashes are used to separate splits.