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Related Experiment Videos

Response bias and aging on a recognition memory task.

Terri J Huh1, Joel H Kramer, Adam Gazzaley

  • 1Department of Psychiatry, Memory and Aging Center, University of California San Francisco, California 94143, USA. thuh@lppi.ucsf.edu

Journal of the International Neuropsychological Society : JINS
|January 26, 2006
PubMed
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Older adults exhibit a more liberal response bias in memory tasks, suggesting age-related frontal lobe changes influence decision-making under uncertainty.

Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology
  • Human Aging Research

Background:

  • Response bias in recognition memory is a decision rule used under uncertainty.
  • Frontal brain regions are implicated in mediating response bias.
  • Aging theories suggest frontal lobe changes contribute to age-related cognitive alterations.

Purpose of the Study:

  • To investigate if age-related frontal lobe changes mediate response bias in older adults.
  • To test the hypothesis that response bias becomes more liberal with increasing age.

Main Methods:

  • Utilized data from 181 younger and 112 older adults from the California Verbal Learning Test-second edition (CVLT-2) normative sample.
  • Employed parametric measures of discriminability and response bias from the CVLT-2 scoring program.

Related Experiment Videos

  • Applied multi-level regression models to analyze the interaction between age and age group on response bias.

    • Main Results:

    • A significant interaction between age and age group predicted response bias.
    • Post hoc analysis revealed increasing age correlated with a more liberal bias in older adults.
    • No significant change in response bias was observed in the younger adult group.

    Conclusions:

    • Findings support the frontal aging hypothesis, suggesting frontal lobe changes may underlie increased liberal response bias with age.
    • This research highlights a specific cognitive mechanism potentially affected by aging in the frontal cortex.
    • Further investigation into frontal lobe function is warranted to fully understand age-related changes in decision-making.