A metric for thought: A comparison of P300 latency and reaction time

  • McCarthy G
  • Donchin E
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Abstract

We confirm that the latency of the P300 component ofthe human event- related potential is determined by processes involved in stimulus evaluation and cat- egorization and is relatively independent ofresponse selection and execution. Stimu- lus discriminability and stimulus-response compatibility were manipulated independ- ently in an "additive-factors" design. Choice reaction time and P300 latency were obtained simultaneously for each trial. Although reaction time was affected by both discriminability and stimulus-response compatibility, P300 latency was affected only by stimulus discriminability.

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Authors

  • Gregory McCarthy

  • Emanuel Donchin

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