UNASSIGNED: We used a difficult visual recognition task with colored pictures of different categories to obtain enough of the four possible SDT outcomes and analyzed them with modern ERP methods.
UNASSIGNED: Non-parametric analysis of these outcomes identified a single time window (470 to 670 ms) which reflected activity within fronto-central and posterior-left clusters of electrodes, indicating differential processing. The posterior-left cluster significantly distinguished all STD outcomes. The fronto-central cluster only distinguished ERPs according to the subject\'s response: yes vs. no. Additionally, only electrophysiological activity within the posterior-left cluster correlated with the discrimination index (d\').
UNASSIGNED: We show that when all SDT outcomes are examined, ERPs of recognition memory reflect a single-time window that may reveal a bottom-up factor discriminating the history of items (i.e. memory strength), as well as a top-down factor indicating participants\' decision.
■我们使用了困难的视觉识别任务,其中包含不同类别的彩色图片,以获得四种可能的SDT结果中的足够多,并用现代ERP方法对其进行了分析。
■这些结果的非参数分析确定了一个时间窗口(470至670ms),该时间窗口反映了前中央和左后电极簇的活动,指示差分处理。左后聚类显著区分所有STD结果。前端中心集群仅根据受试者的响应区分ERP:是与不。此外,只有左后簇内的电生理活动与辨别指数(d')相关。
■我们表明,当检查所有SDT结果时,识别记忆的ERP反映了一个单一的时间窗口,可以揭示一个自下而上的因素区分项目的历史(即记忆强度),以及指示参与者决策的自上而下因素。