Table 1

Simple Discrimination statistics for each problem for each phase

Problem	Latent Phase	Criterion Phase
Problem 1	r_s(9) = 0.68, p = 0.02	r_s(9) = −0.21, p = 0.54
Problem 2	r_s(9) = 0.61, p = 0.05	r_s(9) = −0.16, p = 0.63
Problem 3	r_s(9) = 0.17, p = 0.61	r_s(9) = 0.03, p = 0.94
Problem 4	r_s(9) = 0.47, p = 0.15	r_s(9) = 0.30, p = 0.38
Problem 5	r_s(9) = 0.38, p = 0.25	r_s(9) = 0.15, p = 0.66
Problem 6	r_s(9) = 0.45, p = 0.16	r_s(9) = 0.19, p = 0.58

The length of the Latent Phase changed as a function of age for the first two Simple Discrimination problems but not for any of the later four. The length of the Criterion Phase did not change as a function of age for any of the Simple Discrimination problems.