Abstract

not-yet-known not-yet-known not-yet-known unknown Emotional experiences involve dynamic multi-sensory perception, yet most EEG research uses unimodal stimuli such as photographs. However, a recent study found that realistic emotional videos reliably reduce the amplitude of a steady state visual evoked potential (ssVEP) elicited by a flickering border. It is unknown how the video-ssVEP measure compares to the well-established Late Positive Potential (LPP) that is reliably larger for emotional scenes. To address this question, 45 participants viewed 90 matched pairs of realistic videos and scenes. Replicating the previous study, emotional videos reduced ssVEP amplitude more than neutral videos. At the group level, the video-ssVEP and scene-LPP measures produced similarly large differences per category (pleasant, neutral, unpleasant), and both measures strongly correlated with arousal ratings. However, trial-based Bayesian multilevel models suggest that the group-level results mask important differences. Consistent with previous research, the scene-LPP was sensitive to specific emotional contents (erotica and gore) more than would be predicted by arousal ratings. In contrast, the video-ssVEP did not show this specific sensitivity, and was better explained by individual arousal ratings collected for each stimulus trial. These results suggest that the 2 measures index partially distinct aspects of emotional perception, with the LPP reflecting the discrimination of emotional features, while the ssVEP indexes emotional engagement. Taken together, the results suggest that a video-ssVEP paradigm has comparable single-trial reliability and may better reflect a more diverse range of experienced emotional states relative to scene-LPP paradigms.