Motion | R Documentation |
These data were reported by Thibault et al (2007) (their Figure 4) and provide developmental data on the contrast modulation threshold for detection of a moving stimulus for two kinds of motion, called First-order (or luminance based) and Second-order (contrast based).
data(Motion)
A data frame with 112 observations on the following 5 variables.
Subject
a factor with levels S01
,S02
, ..., S70
coding the id of each observer
LnAge
a numeric vector giving the natural log of age in months
Mtype
a factor with levels FO
SO
coding the type of stimulus, first-order or second-order
Sex
a factor with levels f
m
indicating the sex of the observer
LnThresh
a numeric vector giving the natural log of the percent contrast modulation threshold
The data were collected using preferential-looking techniques. Percent contrast varies between 0 and 100.
Data kindly provided by F. Vital-Durand.
Thibault, D., Brosseau-Lachaine, O., Faubert, J. and Vital-Durand, F. (2007) Maturation of the sensitivity for luminance and contrast modulated patterns during development of normal and pathological human children. Vision Research, 47, 1561–1569
data(Motion)
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