HS/Ibg lines were stratified. Simple main effects were detected in both HAP1 F(3.0,51.3) = 20.70, p < 0.001 and HS/Ibg F(5.4,87.0) = 3.43, p = 0.006 lines, so paired t-tests were performed by Block back to the first block, again Bonferroni correcting for multiple comparisons. In HAP1s, the fourth through the seventh blocks differed from the first ts(17) > 3.43, ps < 0.004. In HS/Ibgs, the fifth, sixth, and seventh blocks differed from the first ts(16) > 3.07, ps < 0.007. Generally, there was an increase in RT later in the session in both lines, but this happened earlier and to a larger degree in the HAP1 versus the HS/Ibg. These data are illustrated in Fig. 3.
