The Influence of Directed Forgetting on Emotional Associative Memory
Wed—HZ_2—Talks9—9306
Presented by: Dipti Singh
One way of voluntarily disregarding unwanted memories is through Directed Forgetting. This technique involves intentionally suppressing unwanted information based on the forgetting cues (Macleod, 1998). Previous studies have majorly focused on declarative memory performance. Here, the present study examines how directed forgetting affects the encoding of emotional associative memory, and what are the associated electrophysiological responses within auditory conditioning paradigm. Seventeen participants underwent the experiment with 40 images paired either to an aversive sound (CS+) or no sound (CS-). In acquisition phase, all participants were asked to remember one half and forget the other half of the stimuli based on the presentation of forget cue. Acquisition phase was followed by a recall, recognition and liking ratings task for the combined measurement of memory. Participants recalled significantly more "remember" items than "forget" items (F(1,16)=11.51,p=<.01,η² =.42) and had higher recall for CS- items compared to CS+ items (F(1,16) = 9.02, p =<.01,η²=.36). Participants were more accurate in categorizing "remember" items than "forget" items for both CS+ (t(16)=3.06,p=<.01) and CS- stimuli (t(16)=4.69,p<.001). Liking ratings revealed a significant interaction between stimulus and instructions (F(1,16)=7.79, p =.013, η2 =.33). EEG analysis demonstrated CS+ stimulus elicited increased peaks in the delta and beta power between the time period of 0-2 and 6-8 secs respectively. Alpha and beta power peaks for cue presentation around the time period of 0–2 seconds, indicating inhibition of memory (Scholz et al., 2021). The findings can potentially offer therapeutic benefits for individuals dealing with traumatic memories.
Keywords: Directed Forgetting, Emotional Associations, Encoding, Auditory Conditioning, EEG