PDF(Pubmed)
Abstract：
Computational models and eye-tracking research suggest that encoding variability accounts for the reduced recognition of targets (A) when paired with non-corresponding lures (B\') relative to corresponding lures (A\'). The current study examined whether neural activity during learning coincided with subsequent performance on the forced-choice Mnemonic Similarity Task (MST). Event-related potential responses were collected during encoding while young adults completed A-B\' and A-A\' trials of the forced-choice MST. Consistent with previous research, performance was lower on A-B\' trials than A-A\' trials. The subsequent memory effect was not significant for the A-A\' test format. However, for A-B\' trials, we observed a significant Accuracy × Stimulus interaction 1000-1200 ms poststimulus onset across frontal and fronto-central electrodes. As hypothesized, subsequently correct A-B\' trials were associated with a larger amplitude response at encoding to the target (A) than the original version of the non-corresponding lure (B). However, subsequently incorrect trials were associated with a larger amplitude response to the non-corresponding lure (B) than the target stimulus (A). These findings provide additional support for the effect of encoding variability on mnemonic discrimination.
摘要：
计算模型和眼动追踪研究表明，相对于相应的诱饵（A\'），与非相应的诱饵（B\'）配对时，编码可变性导致目标（A）的识别减少。当前的研究检查了学习过程中的神经活动是否与强制选择记忆相似任务（MST）的后续表现相吻合。在编码过程中收集了与事件相关的潜在反应，而年轻人完成了强制选择MST的A-B\'和A-A\'试验。与以前的研究一致，A-B试验的性能低于A-A试验。对于A-A\'测试格式，随后的记忆效应不显著。然而,A-B试验,我们在额叶和额叶-中央电极上观察到刺激发作后1000-1200ms的准确性×刺激相互作用。正如假设的那样，随后正确的A-B试验在编码目标时(A)的振幅响应大于原始版本的非对应诱饵(B).然而,随后不正确的试验与非相应的引诱(B)的振幅反应大于目标刺激(A).这些发现为编码变异性对记忆区分的影响提供了额外的支持。
