title: A modified card procedure for measuring human infant color vision.
abstract: To improve test efficiency, we modified our previously introduced contrast/color card test by including a patterned test stimulus and reducing the number of stimuli in both experimental phases. Compared with the prototype, completion rate improved substantially (79 vs. 37%) but test time decreased only modestly (19 vs. 21 min). Achromatic contrast discrimination improved threefold (mean, 0.06 vs. 0.20 log units), but the percentage of 2-month-old infants who discriminated (from gray) 660-nm red (86 vs. 80%) and 580-nm yellow (52 vs. 55%) was consistent. In addition, 48% discriminated 574-nm yellow-green. Moreover, because 88% of infants' failures included the respective adult brightness/luminance match, a small range of relative luminances is adequate for testing infant color vision.
authors.affiliation: Department of Psychology, Memorial University, St. John's, Newfoundland, Canada.
authors.forename: R J
authors.initials: RJ
authors.lastname: Adams
authors.forename: M L
authors.initials: ML
authors.lastname: Courage
authors.forename: M
authors.initials: M
authors.lastname: Glynn
mesh_terms: D003118:Color Perception / Q000502:physiology*; D003119:Color Perception Tests / Q000379:methods*; D003117:Color Vision Defects / Q000175:diagnosis; D015350:Contrast Sensitivity; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male