Boosting The Intervention Effect of Negative Memory Through tACS Stimulation

This study will adopt two memory updating strategies: retrieval practice and reactivation. A 5-day memory updating experimental paradigm is used. 1. On the first day, the old memory A-B linkage is learned, where A represents a neutral word and B is either neutral or negative pictures (half of each, randomly scrambled). 2. On the second day, the old memory A-B association is consolidated again, and after a 15-minute break, the new memory A-C association is learned, where A is still the word A used in the old memory A-B association on the first day, and C is the new neutral and negative pictures (half of each, randomly scrambled, and with inconsistent categories of C and B in each pair of AC and AB). Immediately following this, the new memories of the A-C conjunctions are updated using both Retrieval practice and Restudy (control condition) memory strategies. 3. A-C is extracted/learned using both Retrieval practice and Restudy memory strategies on both day 3 and day 4. 4. On the fifth day, memory tests for associative memory strength, gist and detail memory, as well as emotional valence and strength are performed.