Crites S L, Delgado P, Devine J V, Lozano D I
Department of Psychology, University of Texas at El Paso, 79968, USA.
Psychophysiology. 2000 Nov;37(6):850-8.
In this study we examined whether event-related potentials (ERPs) associated with stimulus repetition and recognition in a serial-probe recognition task were comparable to ERPs in other tasks that are more typically used to investigate old/new ERP effects. The experiment consisted of 320 trials in which a recognition probe followed a four-item memory set; 160 trials consisted of images depicting common objects that were easy to label (EL task), and 160 trials consisted of images depicting abstract patterns that were difficult to label (DL task). Nineteen participants indicated whether a probe that followed each memory set was or was not presented in the memory set. Half of the probes matched, and half did not match, an item in the preceding memory set. ERPs appeared to reflect two processes--one that differentiated between recently presented stimuli and other stimuli and another that distinguished between repeated stimuli and new stimuli. ERPs to recent probes were more positive than ERPs to other probes in the EL and DL tasks. ERPs to match (old) probes were more positive than ERPs to nonmatch (new) probes only in the EL task.
在本研究中，我们考察了在系列探测识别任务中与刺激重复和识别相关的事件相关电位（ERP）是否与其他更常用于研究新旧ERP效应的任务中的ERP相当。实验包括320次试验，其中识别探测紧跟在一个四项记忆组之后；160次试验包含描绘易于命名的常见物体的图像（EL任务），160次试验包含描绘难以命名的抽象图案的图像（DL任务）。19名参与者指出紧跟在每个记忆组之后的探测是否出现在记忆组中。一半的探测与前一个记忆组中的一个项目匹配，另一半不匹配。ERP似乎反映了两个过程——一个区分最近呈现的刺激和其他刺激，另一个区分重复刺激和新刺激。在EL和DL任务中，对最近探测的ERP比其他探测的ERP更正。仅在EL任务中，对匹配（旧）探测的ERP比不匹配（新）探测的ERP更正。
