showed a trendp = 0.07
The corresponding additive DAT1 and COMT effects on the visual N700 following non-target stimuli which had been preceded by the cue ‘A’ showed a trend for DAT1 (t = 1.8; p = 0.07) but no effect of COMT (t = 0.7; p = 0.48), while the interaction between DAT1 and COMT reached trend level in this case (t = 1.8; p = 0.08).