Fig. 3: Figure depicting LPP at electrode Pz.

Central lines depict the grand average ERP amplitude across participants, and the shaded error bands denote 95% between-subjects confidence intervals (red: high arousal negative; orange: high arousal positive; green: low arousal negative; blue: low arousal positive; purple: neutral). a ERPs showing the LPP for every condition in the experiment. A 2 (valence: positive vs. negative)āĆā2 (arousal: high vs. low)āĆā2 (window: early LPP vs. late LPP) repeated-measures ANOVA was used to assess the LPP across image types revealed a significant three-way interaction, F(1, 189)ā=ā23.34, pā<ā0.001. b ERPs showing the effect of valence (positive minus negativeādashed black line) and arousal (high minus lowāsolid black line) on the LPP amplitude. HA, high arousal image; LA, low arousal image; D denotes difference wave.