Event-related brain potentials dissociate repetition effects of high- and low-frequency words.

@article{citeulike:364436, abstract = {Event-related brain potentials (ERPs) were recorded while subjects detected nonwords interspersed among sequences of words of high or low frequency of occurrence. In Phase 1, a proportion of the words were repeated after six intervening items. In Phase 2, which followed after a break of approximately 15 min, the words were either repeats of items presented in the previous phase or new. Unrepeated low-frequency words evoked larger N400 components than did high-frequency items. In Phase 1, this effect interacted with repetition, such that no frequency effects were observed on N400s evoked by repeated words. In addition, the post-500-msec latency region of the ERPs exhibited a substantial repetition effect for low-frequency words, but did not differentiate unrepeated and repeated high-frequency words. In Phase 2, ERPs evoked by "old" and "new" high-frequency words did not differ in any latency region, while those evoked by old and new low-frequency words differed only after 500 msec. The interactive effects of frequency and repetition suggest that these variables act jointly at multiple loci during the processing of a word. The specificity of the post-500-msec repetition effect for low-frequency words may reflect a process responsive to a discrepancy between words' intra and extraexperimental familiarity.}, address = {Wellcome Brain Research Group, Department of Psychology, University of St. Andrews, Fife, United Kingdom.}, author = {Rugg, M. D. }, citeulike-article-id = {364436}, issn = {0090-502X}, journal = {Mem Cognit}, keywords = {cognition, erp, fluency, memory, processing}, month = {July}, number = {4}, pages = {367--379}, posted-at = {2005-10-25 12:59:16}, priority = {5}, title = {Event-related brain potentials dissociate repetition effects of high- and low-frequency words.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/2381316}, volume = {18}, year = {1990} }

TY - JOUR ID - citeulike:364436 L3 - citeulike-article-id:364436 TI - Event-related brain potentials dissociate repetition effects of high- and low-frequency words. JF - Mem Cognit VL - 18 IS - 4 SP - 367 EP - 379 AD - Wellcome Brain Research Group, Department of Psychology, University of St. Andrews, Fife, United Kingdom. SN - 0090-502X N2 - Event-related brain potentials (ERPs) were recorded while subjects detected nonwords interspersed among sequences of words of high or low frequency of occurrence. In Phase 1, a proportion of the words were repeated after six intervening items. In Phase 2, which followed after a break of approximately 15 min, the words were either repeats of items presented in the previous phase or new. Unrepeated low-frequency words evoked larger N400 components than did high-frequency items. In Phase 1, this effect interacted with repetition, such that no frequency effects were observed on N400s evoked by repeated words. In addition, the post-500-msec latency region of the ERPs exhibited a substantial repetition effect for low-frequency words, but did not differentiate unrepeated and repeated high-frequency words. In Phase 2, ERPs evoked by "old" and "new" high-frequency words did not differ in any latency region, while those evoked by old and new low-frequency words differed only after 500 msec. The interactive effects of frequency and repetition suggest that these variables act jointly at multiple loci during the processing of a word. The specificity of the post-500-msec repetition effect for low-frequency words may reflect a process responsive to a discrepancy between words' intra and extraexperimental familiarity. KW - cognition KW - erp KW - fluency KW - memory KW - processing AU - Rugg, MD PY - 1990/07// UR - http://view.ncbi.nlm.nih.gov/pubmed/2381316 ER -