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Working-memory capacity, proactive interference, and divided attention: limits on long-term memory retrieval.

M J Kane1, R W Engle

  • 1Department of Psychology, Georgia State University, Atlanta 30303-3083, USA. mkane@gsu.edu

Journal of Experimental Psychology. Learning, Memory, and Cognition
|April 14, 2000
PubMed
Summary
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Individuals with lower working memory (WM) capacity are more susceptible to proactive interference (PI). However, attentional demands reduce this susceptibility, suggesting attention aids in mitigating PI.

Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • Proactive interference (PI) occurs when previously learned information interferes with new learning.
  • Individual differences in working memory (WM) capacity may influence susceptibility to PI.

Purpose of the Study:

  • To investigate the relationship between working memory (WM) capacity and proactive interference (PI).
  • To examine the role of attentional processing in mitigating PI susceptibility.

Main Methods:

  • Two experiments tested high and low WM-span participants on a PI-buildup task.
  • Participants performed the task under single-task or dual-task (divided attention) conditions.
  • A concurrent task (finger-tapping) was used to manipulate attentional load during encoding and retrieval.

Related Experiment Videos

Main Results:

  • Low-span individuals exhibited greater PI than high-span individuals under single-task conditions.
  • Under dual-task conditions, both groups showed equivalent PI.
  • Increased attentional load (dual-task) specifically increased PI for high-span individuals.
  • Low-span individuals showed a dual-task cost on initial memory, prior to PI buildup.

Conclusions:

  • Attentional processes, potentially inhibitory in nature, play a crucial role at encoding and retrieval in combating PI.
  • Findings support theories linking WM capacity, attention, and prefrontal cortex function in interference control.