PDF(Pubmed)
Abstract：
UNASSIGNED: Event-related potential (ERP) studies have identified two time windows associated with recognition memory and interpreted them as reflecting two processes: familiarity and recollection. However, using relatively simple stimuli and achieving high recognition rates, most studies focused on hits and correct rejections. This leaves out some information (misses and false alarms) that according to Signal Detection Theory (SDT) is necessary to understand signal processing.
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.
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.
摘要：
■事件相关电位（ERP）研究已经确定了与识别记忆相关的两个时间窗口，并将其解释为反映了两个过程：熟悉和回忆。然而,使用相对简单的刺激并获得高识别率，大多数研究集中在命中和正确的拒绝。根据信号检测理论（SDT），这省略了一些信息（未命中和错误警报），这些信息对于理解信号处理是必要的。
■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。
■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。
