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Learning how to exploit sources of information.

Brad Wyble1, Michael Hess2, Ryan E O'Donnell3

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Repeated task experience impairs memory for unexpected details by refining control processes. This leads to specialized memory representations that worsen recall for surprise questions over time.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Memory Research

Background:

  • Previous studies show an inability to recall unexpected target attributes in search displays.
  • This "representational poverty" suggests information exploitation by control processes.
  • Control processes may specialize memory conversion based on available information.

Purpose of the Study:

  • To investigate how task experience shapes memory formation strategies.
  • To test the hypothesis that memory representations specialize with task experience.
  • To determine if report accuracy for unexpected information worsens with increased trials.

Main Methods:

  • Subjects performed a task requiring recall of a letter's location among digits.
  • A surprise question assessed recall of the letter's identity.
  • A follow-up study manipulated proactive interference by varying surprise test stimuli.

Main Results:

  • Report accuracy for the surprise question progressively worsened as the experiment progressed.
  • This decline was not explained by proactive interference, as shown in the follow-up study.
  • The effect was replicated using a similar paradigm with color disks.

Conclusions:

  • Repeated task performance adaptively modifies control processes.
  • These processes focus information on expected future-relevant attributes, not immediate task relevance.
  • Memory specialization occurs with task experience, impacting recall of unexpected details.