marginally significantp = 0.053
Planned comparisons indicated that the difference in P e amplitude between errors and correct responses at Fcz was marginally significant in adults, F (1,46) = 3.94, p = 0.053, older children, F (1,46) = 3.06, p = 0.087, and younger children, F (1,46) = 3.25, p = 0.078 groups, but not in the medium children group, p > 0.1.