研究目的
To investigate the effects of facial attractiveness as a social reward on working memory performance and the underlying neural mechanisms, specifically focusing on DLPFC activation using NIRS.
研究成果
The anticipation of viewing attractive faces enhances verbal working memory performance, but this enhancement is not mediated by DLPFC activation, suggesting different neural mechanisms compared to monetary rewards. Future research should use whole-brain imaging to explore other regions like the striatum.
研究不足
The study did not measure activation in other brain regions beyond the DLPFC, and the use of time pressure in the task may have influenced results. The applicability to real-world situations and the delay in reward acquisition were not fully addressed.
1：Experimental Design and Method Selection:
The study used a blocked design with rewarded (R+) and non-rewarded (R-) blocks in a Sternberg-type verbal working memory task. NIRS was employed to measure brain activation in the DLPFC.
2：Sample Selection and Data Sources:
Thirty-eight native Japanese speakers (19 men, 19 women, mean age
3：82 years) participated. Words were selected from the NTT database, and attractive face stimuli were generated using composite images. List of Experimental Equipment and Materials:
Equipment included a Windows PC with Hot Soup Processor
4：3 for stimulus presentation, a 17-inch screen, and a 42-channel NIRS system (FOIRE-3000, Shimadzu Corporation). Materials included Japanese words and composite face images. Experimental Procedures and Operational Workflow:
Participants performed the working memory task with reward cues indicating attractive face rewards. Each trial involved a fixation cross, reward cue, memory set encoding, delay, probe presentation, response, and feedback. NIRS data were acquired during task blocks.
5：Data Analysis Methods:
Behavioral data (accuracy and reaction time) were analyzed using paired t-tests. NIRS data focused on oxy-hemoglobin changes in the DLPFC, with baseline correction and low-pass filtering.
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