Reaction time analysis of two types of motor preparation for speech articulation: action as a sequence of chunks

J Mot Behav. 2003 Jun;35(2):135-50. doi: 10.1080/00222890309602129.


Reaction time (RT) prior to speech articulation increased as a function of response complexity. The RT findings formed 2 patterns, each of which was a different Response Complexity x Paradigm (choice RT vs. simple RT) interaction. That result extends previous findings from manual button-pressing tasks (S. T. Klapp, 1995) to a different action modality. Two different types of response programming, INT and SEQ, are assumed in the interpretation. Whereas INT can be identified with response programming within a word, SEQ fits a different interpretation related to timing of onsets of speech units. A critical assumption is that a long response is represented as a sequence of chunks; that organization is subject to manipulation. New findings suggest some modifications of the previous theory.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Humans
  • Practice, Psychological*
  • Psychomotor Performance / physiology*
  • Random Allocation
  • Reaction Time / physiology*
  • Speech / physiology*
  • Speech Production Measurement*