Herman Deena, Baker Stevenson, Chow Ricky, Cazes Jaime, Alain Claude, Rosenbaum R Shayna
Department of Psychology and Centre for Vision Research, York University, 4700 Keele Street, Toronto, Ontario, M3J 1P3, Canada.
Rotman Research Institute, Baycrest Academy for Research and Education, 3560 Bathurst Street, Toronto, Ontario, M6A 2E1, Canada.
Cereb Cortex. 2023 Sep 9;33(18):10181-10193. doi: 10.1093/cercor/bhad274.
To what extent does incidental encoding of auditory stimuli influence subsequent episodic memory for the same stimuli? We examined whether the mismatch negativity (MMN), an event-related potential generated by auditory change detection, is correlated with participants' ability to discriminate those stimuli (i.e. targets) from highly similar lures and from dissimilar foils. We measured the MMN in 30 young adults (18-32 years, 18 females) using a passive auditory oddball task with standard and deviant 5-tone sequences differing in pitch contour. After exposure, all participants completed an incidental memory test for old targets, lures, and foils. As expected, participants at test exhibited high sensitivity in recognizing target items relative to foils and lower sensitivity in recognizing target items relative to lures. Notably, we found a significant correlation between MMN amplitude and lure discrimination, but not foil discrimination. Our investigation shows that our capacity to discriminate sensory inputs at encoding, as measured by the MMN, translates into precision in memory for those inputs.
听觉刺激的偶然编码在多大程度上会影响随后对相同刺激的情景记忆？我们研究了失配负波（MMN），一种由听觉变化检测产生的事件相关电位，是否与参与者区分这些刺激（即目标）与高度相似的诱饵以及不相似的陪衬物的能力相关。我们使用被动听觉oddball任务，对30名年轻人（18 - 32岁，18名女性）进行MMN测量，该任务采用音高轮廓不同的标准和偏差五音序列。暴露后，所有参与者对旧的目标、诱饵和陪衬物完成一项偶然记忆测试。正如预期的那样，测试中的参与者在识别目标项目相对于陪衬物时表现出高敏感性，而在识别目标项目相对于诱饵时表现出较低的敏感性。值得注意的是，我们发现MMN振幅与诱饵辨别之间存在显著相关性，但与陪衬物辨别无关。我们的研究表明，以MMN衡量的我们在编码时区分感觉输入的能力转化为对这些输入记忆的精确性。
