Yonas and his colleagues have found that 7-month-old infants are sensitive to static-monocular depth information for the location of objects, but 5-month-olds are not. In previous studies, infants were presented with displays that created the illusion that one of two objects was closer or one side of an object was closer, and infants' reaching to the display was recorded. The present study assessed infants' sensitivity to static-monocular depth information using looking time as the dependent measure. Using a habituation-of-looking paradigm, 5- and 7-month-old infants were tested for sensitivity to the depth cues of angle and linear perspective, shading, and relative size. Results suggest that this habituation procedure is useful for assessing 7-month-olds' but not 5-month-olds' static-monocular depth sensitivity.
Bibliographical noteFunding Information:
This research was supported by a National Institute of Child Health and Human Development (HD-16924) grant awarded to Albert Yonas. The first author was supported by a Graduate Fellowship awarded to the Center for Research in Learning, Perception, and Cognition at the University of Minnesota by the National Institute for Child Health and Human Development (HD-07151-08). A version of this article was presented at the biennial meetings of the Society for Research in Child Development. Baltimore. 1987. We would like to thank Marcia Brown and Brenda Hartman for their assistance in conducting the experiments.
- infant perception
- pictorial depth information
- static-monocular depth information
- visual perception