Interpersonal Fitts' law: When two perform as one

Justin Fine, Eric Amazeen

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Intra- and interpersonal coordination was investigated using a bimanual Fitts' law task. Participants tapped rhythmically between pairs of targets. Tapping was performed with one hand (unimanual), two hands (intrapersonal coordination), and one hand together with another participant (interpersonal coordination). The sizes and distances of targets in a pair were manipulated independently for each hand. When target difficulty was unequal across hands, movement times were similar in the coordination conditions, in violation of Fitts' law. Processing speed (measured by index of performance) increased for more difficult tasks, suggesting increased attention, even for dyads. These findings suggest that similar processes, not captured by centralized control, guide coordination for both individuals and dyads. Measures of coordination, though, still showed stronger coordination tendencies for intrapersonal coordination, indicating a possible role for centralized mechanisms.

Original languageEnglish (US)
Pages (from-to)459-469
Number of pages11
JournalExperimental Brain Research
Volume211
Issue number3-4
DOIs
StatePublished - Jun 1 2011

Keywords

  • Coordination
  • Fitts' law
  • Joint-action
  • Motor control

ASJC Scopus subject areas

  • Neuroscience(all)

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