Rayner, Keith; Slattery, Timothy J.; Drieghe, Denis; Liversedge, Simon P. (2015). Data from: Eye movements and word skipping during reading: Effects of word length and predictability. In Keith Rayner Eye Movements in Reading Data Collection. UC San Diego Library Digital Collections. https://doi.org/10.6075/J0F769G5

Publication abstract:
Eye movements were monitored as subjects read sentences containing high- or low-predictable target words. The extent to which target words were predictable from prior context was varied: Half of the target words were predictable, and the other half were unpredictable. In addition, the length of the target word varied: The target words were short (4-6 letters), medium (7-9 letters), or long (10-12 letters). Length and predictability both yielded strong effects on the probability of skipping the target words and on the amount of time readers fixated the target words (when they were not skipped). However, there was no interaction in any of the measures examined for either skipping or fixation time. The results demonstrate that word predictability (due to contextual constraint) and word length have strong and independent influences on word skipping and fixation durations. Furthermore, because the long words extended beyond the word identification span, the data indicate that skipping can occur on the basis of partial information in relation to word identity.
Subject population:
Adults, student

This package contains data and analysis materials for one regular (two-line) reading experiment and the results of a norming experiment. Data files and processing files for the eye movement experiment are available in the component titled "Data". The experimental script is available in the component titled "Materials". The complete set of stimuli are also included in the appendix of the published paper. The raw data from the eye movement experiment are available in ASC (text) format in the "ASC" sub-directory. The files used to process the data are available in the "Processing" sub-directory. Interim files are in the "DA1" sub-directory. Processed data files (one row for each item X subject combination) from EyeDry are available in the "IXS” sub-directory. See the Guide (Related Resource link, below) for details on some of the different types of files and column definitions that are contained in the data collection.

First Fixation Duration = "LJREVFF.IXS",
First Pass Time = "LJREVFP.IXS",
Total Time = "LJREVTT.IXS",
Number of Fixations (first pass) = "LJREVNF1",
Number of Fixations (all) = "LJREVNF2.IXS",
Mean Landing Position = "LJRVLAND.IXS",
Launch Site = LJREVLS.IXS".

A data summary file and the output of the lmer analysis are available in the "Analysis" sub-directory. The data from the norming experiment are also contained in this directory.

• 2011

• 2015

• Drieghe, Denis
• Liversedge, Simon P.
• Slattery, Timothy J.

• Rayner, Keith

Presentation software: EyeTrack (Version Unknown); Font: 14pt Consolas (10 horizontal pixels per character); Viewing distance: 55 cm; Screen resolution: 1280 X 1024; Cut-off for short fixations: 80 ms; Cut-off for long fixations: 2000 ms; Fixations within n characters merged: 1 character; Software used for data processing: TimDrop10.pl, Questions.pl, EyeDry

Funding source:
NIH HD26765, NIH HD065829, Microsoft, Economic and Social Research Council RES-000-22-3398, World Universities Network Award, Fund for Scientific Research Postdoctoral Fellowship

• Eye movements
• Eye-tracking
• Multi-line
• Psychology
• Reading
• Word predictability

• data

• English

Doi: https://doi.org/10.6075/J0F769G5

Primary associated publication

• Rayner, K., Slattery, T.J., Drieghe, D., & Liversedge, S.P. (2011). Eye movements and word skipping during reading: Effects of word length and predictability. Journal of Experimental Psychology: Human Perception and Performance, 37, 514-528. https://doi.org/10.1037/a0020990

Software

• EyeDry: https://blogs.umass.edu/eyelab/software/
• jhook5m.pl: https://sites.google.com/site/drtimothyjslattery/home/software
• Presentation Software: Eyetrack: https://blogs.umass.edu/eyelab/software/
• Questions.pl: https://sites.google.com/site/drtimothyjslattery/home/software
• TimDrop.pl: https://sites.google.com/site/drtimothyjslattery/home/software/

Described by

• Abbott, Matthew J. (2015). Guide to Keith Rayner Eye Movements in Reading Data Collection. In Keith Rayner Eye Movements in Reading Data Collection. UC San Diego Library Digital Collections. https://doi.org/10.6075/J0FF3QPR

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2023-06-01