期刊
PSYCHOPHYSIOLOGY
卷 41, 期 5, 页码 665-678出版社
WILEY
DOI: 10.1111/j.1469-8986.2004.00193.x
关键词
event-related potentials; P300; novelty P3; PCA; information processing
资金
- NIMH NIH HHS [MH11751, MH19554] Funding Source: Medline
Falkenstein, Hohnsbein, and Hoorman (1994) suggested that common measures of P300 latency confound a P-SR component whose latency corresponds to stimulus evaluation time and a P-CR component whose latency varies with response-selection time, thus casting doubt on work in mental chronometry that relies on P300 latency. We report here a replication and extension of Falkenstein et al. (1994) using a high-density 129-electrode montage with 11 subjects. Spatiotemporal PCA was used to extract the components of the ER-P. A centroid measure is also introduced for detecting waveform-timing changes beyond just peak latency. In terms of componentry, we argue that the P-SR and the P-CR, correspond to the P3a/Novelty P3 and the P300, respectively. Conceptually, we dispute the proposed distinction between stimulus evaluation and response selection. We suggest a four-stage ERP model of information processing and place the P3a and the P300 in this framework.
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