Institute of Cognitive Neuroscience, National Central University, Jhongli City, Taiwan.
Psychophysiology. 2013 Nov;50(11):1120-32. doi: 10.1111/psyp.12125. Epub 2013 Aug 5.
In two ERP experiments, we examined whether active inhibition is involved in intentional forgetting. Both experiments consisted of a nondirected-forgetting (nDF) and a directed-forgetting (DF) block. Participants were sequentially presented with a prime, an R/F (remember/forget) cue, and a target. Participants made lexical decisions to both the primes and targets (Experiment 1) or only to the targets (Experiment 2). They were also instructed to remember or to forget the primes in response to the R/F cues in the DF block but to ignore these cues in the nDF block. The N400 semantic priming effect was observed when comparing the ERPs elicited by semantically unrelated and related targets in the DF block. In comparison to the nDF block, the N400 effect was greatly reduced for targets preceded by F cues in the DF block. These findings suggest that semantic processing is reduced by the instruction to forget and active inhibition is involved in intentional forgetting.
在两项 ERP 实验中，我们研究了主动抑制是否参与了有意遗忘。这两个实验都包括无定向遗忘（nDF）和定向遗忘（DF）两个阶段。参与者依次呈现一个启动刺激、一个 R/F（记住/忘记）提示和一个目标刺激。在实验 1 中，参与者对启动刺激和目标刺激进行词汇判断，在实验 2 中，他们只对目标刺激进行词汇判断。他们还被指示在 DF 阶段中对 R/F 提示做出记住或忘记启动刺激的反应，但在 nDF 阶段中忽略这些提示。当比较 DF 阶段中语义上不相关和相关目标刺激引发的 ERP 时，观察到了 N400 语义启动效应。与 nDF 阶段相比，在 DF 阶段中，被 F 提示引导的目标刺激引发的 N400 效应大大降低。这些发现表明，语义处理受到遗忘指令的抑制，主动抑制参与了有意遗忘。
