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research article

Age-Dependent Statistical Learning Trajectories Reveal Differences in Information Weighting

Herff, Steffen A.  
•
Zhen, Shanshan
•
Yu, Rongjun
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December 1, 2020
Psychology And Aging

Statistical learning (SL) is the ability to generate predictions based on probabilistic dependencies in the environment, an ability that is present throughout life. The effect of aging on SL is still unclear. Here, we explore statistical learning in healthy adults (40 younger and 40 older). The novel paradigm tracks learning trajectories and shows age-related differences in overall performance. yet similarities in learning rates. Bayesian models reveal further differences between younger and older adults in dealing with uncertainty in this probabilistic SL task. We test computational models of 3 different learning strategies: (a) Win-Stay, Lose-Shift, (b) Delta Rule Learning, (c) Information Weights to explore whether they capture age-related differences in performance and learning in the present task. A likely candidate mechanism emerges in the form of age-dependent differences in information weights, in which young adults more readily change their behavior, but also show disproportionally strong reactions toward erroneous predictions. With lower but more balanced information weights, older adults show slower behavioral adaptation but eventually arrive at more stable and accurate representations of the underlying transitional probability matrix.

  • Details
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Type
research article
DOI
10.1037/pag0000567
Web of Science ID

WOS:000596732700003

Author(s)
Herff, Steffen A.  
Zhen, Shanshan
Yu, Rongjun
Agres, Kat R.
Date Issued

2020-12-01

Publisher

AMER PSYCHOLOGICAL ASSOC

Published in
Psychology And Aging
Volume

35

Issue

8

Start page

1090

End page

1104

Subjects

Gerontology

•

Psychology, Developmental

•

Geriatrics & Gerontology

•

Psychology

•

statistical learning

•

cognitive assessment

•

continuous paradigm

•

age-related differences

•

information weights

•

adult age

•

serial patterns

•

lose-shift

•

r package

•

win-stay

•

implicit

•

strategy

•

sequence

•

accuracy

•

emotion

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
DCML  
Available on Infoscience
December 23, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/174288
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