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Measuring the Mind: Speed, control, and age$
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John Duncan, Louise Phillips, and Peter McLeod

Print publication date: 2005

Print ISBN-13: 9780198566427

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780198566427.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 24 January 2022

Aging and response times: a comparison of sequential sampling models

Aging and response times: a comparison of sequential sampling models

(p.3) Chapter 1 Aging and response times: a comparison of sequential sampling models
Measuring the Mind: Speed, control, and age

Roger Ratcliff

Anjali Thapar

Philip L. Smith

Gail McKoon

Oxford University Press

This chapter examines the effects of ageing on cognitive processes in two choice tasks. It fits the diffusion model to the response time and accuracy data for each task, and interprets the effects of ageing in terms of the components of processing identified by the model. The chapter addresses whether the interpretations are specific to the diffusion model. To address this question, it fits two other models, the accumulator model and the leaky competing accumulator model of Usher and McClelland, to the data from young and older subjects for six experiments. The chapter finds that, although the diffusion model fits the data better than the other models for most of the experiments, the models' explanations of how ageing affects components of processing do not differ significantly.

Keywords:   diffusion, accuracy data, goodness of fit, ageing, accumulator model

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