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Irrelevant speech, changing state, and order information.

Anna E MacDermid1, Vanessa A Duggan1, Brittany L Miller1

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The changing state effect, where changing irrelevant sounds disrupt memory more, was only found in tasks requiring order. This supports the Object-Oriented Episodic Record (O-OER) model over other memory theories.

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Area of Science:

  • Cognitive Psychology
  • Memory Research
  • Auditory Distraction

Background:

  • The changing state effect describes how variable irrelevant sounds disrupt memory more than constant ones.
  • Existing theories offer conflicting predictions regarding the necessity of order processing for this effect.
  • The Object-Oriented Episodic Record (O-OER) model posits order dependency, contrasting with other models.

Purpose of the Study:

  • To test the O-OER model's prediction that the changing state effect is limited to tasks with an order component.
  • To investigate whether the changing state effect occurs in recognition memory tasks without an explicit order component.
  • To provide evidence for or against competing theories of auditory distraction in memory.

Main Methods:

  • Experiment 1 confirmed the changing state effect in immediate serial recall (an order-dependent task).
  • Experiments 2-4 assessed the effect in surprise 2-alternative forced choice (2AFC) recognition tests using different encoding tasks (lexical decision, pleasantness, frequency).
  • Participants completed tasks in both laboratory and online settings.

Main Results:

  • The changing state effect was observed in immediate serial recall.
  • No changing state effect was found in any of the recognition memory experiments, despite general disruption from irrelevant sounds.
  • Performance was reduced by irrelevant sounds in recognition tasks, but the difference between changing and constant sounds was not significant.

Conclusions:

  • The results support the O-OER model's prediction that the changing state effect is contingent on order processing.
  • The findings challenge theories that predict the changing state effect in tasks lacking an order component.
  • This research highlights the importance of task structure in understanding the impact of auditory distraction on memory.