PMID- 8416077 OWN - NLM STAT- MEDLINE DCOM- 19931123 LR - 20190830 IS - 0048-5772 (Print) IS - 0048-5772 (Linking) VI - 30 IP - 5 DP - 1993 Sep TI - Stimulus presentation rate dissociates sequential effects in event-related potentials and reaction times. PG - 510-7 AB - The present study explored the impact of the stimulus presentation rate on sequential effects in event-related potentials (ERPs) and reaction times (RTs). Random series of equiprobable tones were presented at interstimulus intervals (ISIs) of 1.3, 2.1, and 2.9 s. Fast and accurate choice responses to the tones were required. Although sequential effects in RTs were stable across all ISIs, the common first-order repetition effect in P300 amplitude was only observed at the 1.3-s ISI and not at the slower presentation rates. This dissociation between the first-order effects in RTs and ERPs speaks against an explanation of both effects by a common expectancy mechanism. In addition, sequential effects were observed as early as about 100 ms after stimulus onset in the lateralized readiness potential. Together with similar sequential effects in P300 latency, this finding supports a continuous flow model of information processing. FAU - Leuthold, H AU - Leuthold H AD - Department of Psychology, University of Konstanz, Germany. FAU - Sommer, W AU - Sommer W LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Psychophysiology JT - Psychophysiology JID - 0142657 SB - IM MH - *Acoustic Stimulation MH - Adult MH - *Electroencephalography MH - Female MH - Functional Laterality MH - Humans MH - Male MH - Mental Processes/physiology MH - Reaction Time/*physiology EDAT- 1993/09/01 00:00 MHDA- 1993/09/01 00:01 CRDT- 1993/09/01 00:00 PHST- 1993/09/01 00:00 [pubmed] PHST- 1993/09/01 00:01 [medline] PHST- 1993/09/01 00:00 [entrez] AID - 10.1111/j.1469-8986.1993.tb02074.x [doi] PST - ppublish SO - Psychophysiology. 1993 Sep;30(5):510-7. doi: 10.1111/j.1469-8986.1993.tb02074.x.