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Combining speed and accuracy in cognitive psychology: is the Inverse Efficiency Score (IES) a better dependent variable than the mean Reaction Time (RT) and the Percentage of Errors (PE)?

Raymond Bruyer and Marc Brysbaert UGent (2011) PSYCHOLOGICA BELGICA. 51(1). p.5-13
abstract
Experiments in cognitive psychology usually return two dependent variables: the percentage of errors and the reaction time of the correct responses. Townsend and Ashby (1978, 1983) proposed the inverse efficiency score (IES) as a way to combine both measures and, hence, to provide a better summary of the findings. In this article we examine the usefulness of IES by applying it to existing datasets. Although IES does give a better summary of the findings in some cases, mostly the variance of the measure is increased to such an extent that it becomes less interesting. Against our initial hopes, we have to conclude that it is not a good idea to limit the statistical analyses to IES without further checking the data.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
ATTENTION, FACES, FAMILIARITY, DECISION
journal title
PSYCHOLOGICA BELGICA
Psychol. Belg.
volume
51
issue
1
pages
5 - 13
Web of Science type
Article
Web of Science id
000287184300002
JCR category
PSYCHOLOGY, MULTIDISCIPLINARY
JCR impact factor
0.474 (2011)
JCR rank
89/123 (2011)
JCR quartile
3 (2011)
ISSN
0033-2879
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
2001824
handle
http://hdl.handle.net/1854/LU-2001824
date created
2012-01-24 15:18:31
date last changed
2016-12-19 15:46:18
@article{2001824,
  abstract     = {Experiments in cognitive psychology usually return two dependent variables: the percentage of errors and the reaction time of the correct responses. Townsend and Ashby (1978, 1983) proposed the inverse efficiency score (IES) as a way to combine both measures and, hence, to provide a better summary of the findings. In this article we examine the usefulness of IES by applying it to existing datasets. Although IES does give a better summary of the findings in some cases, mostly the variance of the measure is increased to such an extent that it becomes less interesting. Against our initial hopes, we have to conclude that it is not a good idea to limit the statistical analyses to IES without further checking the data.},
  author       = {Bruyer, Raymond and Brysbaert, Marc},
  issn         = {0033-2879},
  journal      = {PSYCHOLOGICA BELGICA},
  keyword      = {ATTENTION,FACES,FAMILIARITY,DECISION},
  language     = {eng},
  number       = {1},
  pages        = {5--13},
  title        = {Combining speed and accuracy in cognitive psychology: is the Inverse Efficiency Score (IES) a better dependent variable than the mean Reaction Time (RT) and the Percentage of Errors (PE)?},
  volume       = {51},
  year         = {2011},
}

Chicago
Bruyer, Raymond, and Marc Brysbaert. 2011. “Combining Speed and Accuracy in Cognitive Psychology: Is the Inverse Efficiency Score (IES) a Better Dependent Variable Than the Mean Reaction Time (RT) and the Percentage of Errors (PE)?” Psychologica Belgica 51 (1): 5–13.
APA
Bruyer, R., & Brysbaert, M. (2011). Combining speed and accuracy in cognitive psychology: is the Inverse Efficiency Score (IES) a better dependent variable than the mean Reaction Time (RT) and the Percentage of Errors (PE)? PSYCHOLOGICA BELGICA, 51(1), 5–13.
Vancouver
1.
Bruyer R, Brysbaert M. Combining speed and accuracy in cognitive psychology: is the Inverse Efficiency Score (IES) a better dependent variable than the mean Reaction Time (RT) and the Percentage of Errors (PE)? PSYCHOLOGICA BELGICA. 2011;51(1):5–13.
MLA
Bruyer, Raymond, and Marc Brysbaert. “Combining Speed and Accuracy in Cognitive Psychology: Is the Inverse Efficiency Score (IES) a Better Dependent Variable Than the Mean Reaction Time (RT) and the Percentage of Errors (PE)?” PSYCHOLOGICA BELGICA 51.1 (2011): 5–13. Print.