Motion: Threshold for First- and Second-order Movement with Age

Description Usage Format Details Source References Examples

Description

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).

Usage

1

Format

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

Details

The data were collected using preferential-looking techniques. Percent contrast varies between 0 and 100.

Source

Data kindly provided by F. Vital-Durand.

References

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

Examples

1

MPDiR documentation built on May 31, 2017, 4:18 a.m.