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Is task interference in event-based prospective memory dependent on cue presentation?

Shayne Loft1, Rebecca Kearney, Roger Remington

  • 1School of Psychology, University of Queensland, Brisbane, Queensland, Australia. lofts@psy.uq.edu.au

Memory & Cognition
|March 8, 2008
PubMed
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Task interference in prospective memory tasks decreases with experience. This reduction is greater when cues are absent, suggesting attention allocation policies adapt dynamically without explicit warnings.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory

Background:

  • Prospective memory involves remembering to perform an intended action in the future.
  • Task interference, a performance cost to ongoing activities, is central to understanding prospective memory mechanisms.
  • Current theories suggest task interference stems from attention allocation policies encoded with intentions.

Purpose of the Study:

  • To investigate whether attention allocation policies in prospective memory can change with ongoing task experience.
  • To determine the role of cue presentation in maintaining these policies.
  • To examine the adaptive nature of task interference in event-based prospective memory.

Main Methods:

  • Three experiments were conducted involving event-based prospective memory tasks with varying cue presentations and task experience.

Related Experiment Videos

  • Participants performed ongoing tasks while intending to respond to specific cues.
  • Task interference was measured as the performance cost on the ongoing task.

    • Main Results:

    • Task interference was significantly reduced when expected prospective memory cues were not presented compared to when they were.
    • This effect was replicated when the prospective memory task's importance was emphasized.
    • Task interference decreased over time, with a more pronounced decrease observed in the absence of cue presentation.

    Conclusions:

    • Attention allocation policies in prospective memory are not static and can adapt with ongoing task experience.
    • Cue presentation plays a crucial role in maintaining established attention allocation policies.
    • This study demonstrates dynamic changes in task interference without prior warning regarding trial relevance, offering new insights into memory and attention.