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Related Concept Videos

Working Memory01:24

Working Memory

Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.
Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...

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Related Experiment Video

Updated: May 24, 2026

A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
10:38

A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions

Published on: July 16, 2015

Proactive interference does not meaningfully distort visual working memory capacity estimates in the canonical change

Po-Han Lin1, Steven J Luck

  • 1Graduate Institute of Learning and Instruction, National Central University Jhongli, Taiwan.

Frontiers in Psychology
|March 10, 2012
PubMed
Summary

Visual working memory capacity, estimated using change detection tasks, is not significantly affected by proactive interference. This suggests the standard task accurately measures memory capacity without long-term memory contamination.

Keywords:
capacitychange detectionproactive interferenceworking memory

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Memory

Background:

  • Change detection tasks are standard for estimating visual working memory capacity.
  • It is assumed these tasks isolate short-term storage from long-term memory.
  • Long-term memory, specifically proactive interference, may inflate errors and reduce estimated capacity.

Purpose of the Study:

  • To investigate if the canonical change detection task is influenced by proactive interference.
  • To determine if visual working memory capacity estimates are accurate or confounded by prior trial memory traces.

Main Methods:

  • Two experiments were conducted using the canonical change detection task.
  • Methods were chosen that typically yield significant proactive interference.
  • Participants performed tasks involving simple, briefly presented features.

Main Results:

  • No significant proactive interference was observed in either experiment.
  • Performance on the canonical change detection task was not meaningfully influenced by prior trials.
  • This indicates the task reliably assesses visual working memory capacity.

Conclusions:

  • The canonical change detection task is a valid measure of visual working memory capacity.
  • Proactive interference does not meaningfully impact capacity estimates in this standard task.
  • Future research can confidently use this method to study visual working memory.