R Dataset / Package DAAG / tinting

Submitted by pmagunia on March 9, 2018 - 1:06 PM
Dataset License
GNU General Public License v2.0
Attachment Size
dataset-85017.csv 8.8 KB

Car Window Tinting Experiment Data


These data are from an experiment that aimed to model the effects of the tinting of car windows on visual performance. The authors were mainly interested in effects on side window vision, and hence in visual recognition tasks that would be performed when looking through side windows.




This data frame contains the following columns:


observation number


subject identifier code (1-26)


age (in years)


a factor with levels f female, m male


an ordered factor with levels representing degree of tinting: no < lo < hi


a factor with levels locon: low contrast, hicon: high contrast


the inspection time, the time required to perform a simple discrimination task (in milliseconds)


critical stimulus onset asynchrony, the time to recognize an alphanumeric target (in milliseconds)


a factor with levels younger, 21-27, older, 70-78


Visual light transmittance (VLT) levels were 100% (tint=none), 81.3% (tint=lo), and 35.1% (tint=hi). Based on these and other data, Burns et al. argue that road safety may be compromised if the front side windows of cars are tinted to 35


Burns, N.R., Nettlebeck, T., White, M. and Willson, J., 1999. Effects of car window tinting on visual performance: a comparison of younger and older drivers. Ergonomics 42: 428-443.


levels(tinting$agegp) <- capstring(levels(tinting$agegp))
xyplot(csoa ~ it | sex * agegp, data=tinting) # Simple use of xyplot()
pause()xyplot(csoa ~ it|sex*agegp, data=tinting, panel=panel.superpose, groups=target)
pause()xyplot(csoa ~ it|sex*agegp, data=tinting, panel=panel.superpose, col=1:2,
  groups=target, key=list(x=0.14, y=0.84, points=list(pch=rep(1,2),
  col=1:2), text=list(levels(tinting$target), col=1:2), border=TRUE))
pause()xyplot(csoa ~ it|sex*agegp, data=tinting, panel=panel.superpose,
  groups=tint, type=c("p","smooth"), span=0.8, col=1:3,
  key=list(x=0.14, y=0.84, points=list(pch=rep(1,2), col=1:3),
  text=list(levels(tinting$tint), col=1:3), border=TRUE))

Dataset imported from https://www.r-project.org.

Documentation License
GNU General Public License v2.0

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