The effect of target detection task on memory encoding varies in different stimulus onset asynchronies

Area of Science:

• Cognitive Psychology
• Neuroscience

Background:

• The attentional boost effect (ABE) and action-induced memory enhancement (AIME) demonstrate superior memory for items linked to targets during simultaneous tasks.
• However, the precise temporal relationship between target detection and memory encoding remains underexplored.

Purpose of the Study:

• To investigate the temporal dynamics of how a target detection task influences memory encoding.
• To determine if temporal overlap between stimuli is necessary for post-response memory enhancement.

Main Methods:

• Employed a remember/know study-test paradigm, manipulating stimulus onset asynchrony (SOA) between detection stimuli and words to be memorized.
• Focused on memory performance for words presented after the detection response.

Main Results:

• Memory enhancement was robust for stimulus onset asynchronies (SOA) from 0 s to 0.75 s.
• Enhancement weakened or became non-significant at SOA = 1 s, particularly for familiarity-based (K) responses.
• Significant post-response memory enhancement persisted even without temporal overlap, comparable to temporally overlapping conditions.

Conclusions:

• Target-paired memory enhancement, specifically recollection, occurs regardless of simultaneous presentation or a short interval post-response.
• Temporal overlap between target stimuli and memory items is not a prerequisite for post-response memory enhancement.