Gibbons Henning, Rammsayer Thomas H, Stahl Jutta
Georg-Elias-Müller-Institute for Psychology, University of Göttingen, Germany.
Mem Cognit. 2006 Jan;34(1):172-86. doi: 10.3758/bf03193396.
Event-related potential correlates of positive priming (PP) and negative priming (NP) were investigated in order to further elucidate the cognitive mechanisms involved. Thirty-six participants performed both an identity- and a location-based priming task. Repeating the target stimulus/location from the immediately preceding display produced behavioral PP. With localization, but not with identification, behavioral NP was observed when the target stimulus/location matched the preceding distractor stimulus/location. Smaller P300 amplitude accompanied identity-based PP, suggesting persisting target-specific activation. The lateralized readiness potential, an index of correct/incorrect response activation, indicated persisting central motor activation as another source of PP. Both location-based PP and NP were accompanied by reduced P1/N1 and P300 amplitudes, pointing to the involvement of inhibition of return in location-based priming. The results support the view that multiple brain processes underlie behavioral priming.
为了进一步阐明其中涉及的认知机制，研究了与事件相关电位的正启动（PP）和负启动（NP）的相关性。36名参与者执行了基于身份和基于位置的启动任务。重复前一个显示中的目标刺激/位置会产生行为性PP。在定位任务中，当目标刺激/位置与前一个干扰刺激/位置匹配时，观察到行为性NP，但在识别任务中未观察到。基于身份的PP伴随着较小的P300波幅，表明存在持续的目标特异性激活。侧化准备电位是正确/错误反应激活的指标，表明持续的中枢运动激活是PP的另一个来源。基于位置的PP和NP均伴随着P1/N1和P300波幅的降低，表明返回抑制参与了基于位置的启动。结果支持了行为启动背后存在多种脑过程的观点。
