Indeed, analyses with shorter time windows revealed that the interaction of RC-Type * Electrodes * WM approached significance between 750 and 900 ms in the medial analysis [ F (2, 34) = 3.125, p = 0.077, η 2 = 0.148], and reached significance between 850 and 900 ms [ F (2, 34) = 4.711, p = 0.022, η 2 = 0.207].
Because there was a highly significant correlation between the two WM measures and because Ospan scores could not be elicited from six participants due to accuracy limitation, the digit span scores were considered in dividing participants into high (digit span at or above the median 10, N = 13, Age Mean = 22) and low (digit span below the median 10, N = 11, Age Mean = 23) WM groups.