3.1.2 Accuracy A similar pattern emerged for accuracy ( Figure 2b ), where there was also main effect of Quarter, F (1.65,37.86) = 2.71, p = 0.05, though with marginal significance.
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Conflict and control in error monitoring during sustained visual discrimination.
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An interesting finding in the current study were the increases in magnitude and variance in ERN amplitudes during the last block of trials (Quarter 4) during simultaneous discrimination, though only trending toward significance.
Similarly, significant omnibus model estimates for Quarter 2, β = 0.31, SE = 0.06, z = 5.32, p < 0.01, Quarter 3, β = 0.33, SE = 0.06, z = 5.64, p < 0.01, and Quarter 4, β = 0.26, SE = 0.06, z = 4.51, p < 0.01, reflect a significant difference in false alarm rates between Quarter 1 ( M = 0.028, SE = 0.007) and Quarter 3 ( M = 0.031, SE = 0.008, z = −2.63, p = 0.04) and a difference between Quarters 1 and 4 ( M = 0.031, SE = 0.008, z = −2.56, p = 0.05) of marginal significance.