The late positive potential (LPP) in event-related potentials (ERPs) is modulated by the motivational relevance of affective pictures. This study investigated how emotional pictures, presented in a random sequence, influence LPP compared to neutral pictures. The results showed that both pleasant and unpleasant pictures elicited larger LPPs than neutral pictures, with high-arousal pictures showing even greater LPPs. The LPP was also more pronounced over the right parietal hemisphere compared to the left, suggesting a lateralization effect. These findings support the idea that LPP is influenced by both the intrinsic motivational significance of the pictures and the evaluative context in which they are presented. The study also found that emotional intensity affects LPP amplitude, with more intense pictures eliciting larger positive waves. The results indicate that LPP reflects sustained attention and motivational engagement with the stimuli, rather than just their affective valence. The study highlights the importance of both the intrinsic properties of the stimuli and the contextual factors in shaping ERP responses to emotional pictures.The late positive potential (LPP) in event-related potentials (ERPs) is modulated by the motivational relevance of affective pictures. This study investigated how emotional pictures, presented in a random sequence, influence LPP compared to neutral pictures. The results showed that both pleasant and unpleasant pictures elicited larger LPPs than neutral pictures, with high-arousal pictures showing even greater LPPs. The LPP was also more pronounced over the right parietal hemisphere compared to the left, suggesting a lateralization effect. These findings support the idea that LPP is influenced by both the intrinsic motivational significance of the pictures and the evaluative context in which they are presented. The study also found that emotional intensity affects LPP amplitude, with more intense pictures eliciting larger positive waves. The results indicate that LPP reflects sustained attention and motivational engagement with the stimuli, rather than just their affective valence. The study highlights the importance of both the intrinsic properties of the stimuli and the contextual factors in shaping ERP responses to emotional pictures.