Arousal and valence differentially shape temporal memory for naturalistic events

Area of Science:

• Cognitive Neuroscience
• Psychology
• Neuroscience of Emotion

Background:

• Emotional arousal and negative valence are known to influence episodic memory.
• The specific contributions of these emotional components to distinct aspects of temporal memory, such as order and distance, are not well understood.
• Investigating naturalistic emotional memory requires examining memory for complex events like movie clips.

Purpose of the Study:

• To investigate how emotional arousal and negative valence differentially affect relative order and distance estimations in temporal memory.
• To explore the roles of negative valence and arousal in memory for naturalistic events.
• To determine the relationship between temporal distance expansion and relative order discrimination.

Main Methods:

• Participants viewed aversive and neutral movie clips.
• Memory for the relative order of events and estimations of temporal distance were assessed.
• Statistical analyses examined the differential contributions of arousal and valence to temporal memory components.

Main Results:

• Relative order memory was enhanced for aversive compared to neutral clips.
• Distance estimations were modestly compressed for aversive clips.
• Negative valence specifically enhanced relative order, while both arousal and negative valence influenced temporal compression.

Conclusions:

• Emotional arousal and negative valence have dissociable yet interacting effects on temporal memory for naturalistic events.
• Negative valence uniquely drives improvements in memory for event order.
• Temporal compression is jointly influenced by arousal and negative valence, with temporal expansion potentially linked to novelty detection.