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More Than Hitting the Correct Key Quickly.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human-Computer Interaction

Background:

  • Multitasking is known to impair implicit sequence learning, affecting reaction times (RT).
  • Previous research focused on RT benefits, often overlooking spatial aspects of performance.
  • The influence of multitasking on response location variability in sequence learning remains underexplored.

Purpose of the Study:

  • To investigate how multitasking affects response location variability in sequence learning.
  • To examine the interplay between sequence breaks, multitasking demands, and block-level multitasking on performance.
  • To differentiate the effects of sequence knowledge on RT versus response location.

Main Methods:

  • Participants performed a Serial Reaction Time Task (SRTT) on a touchscreen.
  • A secondary task involved pressing a space bar to silence a beep.
  • Sequence predictability was manipulated by introducing off-sequence location deviants.

Main Results:

  • A dissociation was observed between reaction time (RT) and response location variability.
  • Breaking a learned sequence had a larger RT impact under single-tasking than multitasking.
  • Increased response location variability occurred only under multitasking conditions when sequences were broken.
  • Sequence knowledge effects were limited by multitasking interference.

Conclusions:

  • Multitasking differentially affects sequence learning outcomes, impacting spatial accuracy more than temporal accuracy.
  • Response location variability is a sensitive indicator of sequence learning disruption under multitasking.
  • Cognitive load from multitasking interferes with the expression of implicit sequence knowledge.