University of Illinois Urbana-Champaign

Estimating frequency and size of effects due to experimental manipulations in eye movement research

McConkie, George W.; Zola, David; Wolverton, Gary S.

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https://hdl.handle.net/2142/31266

Description

Title
Estimating frequency and size of effects due to experimental manipulations in eye movement research
Author(s)
  • McConkie, George W.
  • Zola, David
  • Wolverton, Gary S.
Issue Date
1985-06
Keyword(s)
  • eye movement
  • frequency of effects analysis
  • perceptual span
Abstract
In studies of eye movement behavior, once it has been demonstrated that an experimental manipulation has produced a reliable effect, it is often useful to try to estimate the frequency with which the effect occurred. This paper describes the Frequency of Effects Analysis and illustrates its use with data from a study on characteristics of the perceptual span of adult readers. The results of the analysis indicated that, in one instance, a manipulation which produced a 21 msec increase in fixation duration was actually producing a 151 msec increase in only 21$ of the instances, and was having no effect in the remaining 79% of the cases.
Publisher
  • Champaign, Ill. : University of Illinois at Urbana-Champaign, Center for the Study of Reading.
  • Cambridge, Mass. : Bolt Beranek and Newman, Inc.
Series/Report Name or Number
Center for the Study of Reading Technical Report ; no. 338
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/31266
Copyright and License Information
Copyright 1985 Board of Trustees University of Illinois

Owning Collections

Technical Reports - Center for the Study of Reading PRIMARY