Even though it is undisputed that prior information regarding the location of a target affects visual selection, the issue of whether information regarding nonspatial features, such as color and shape, has similar effects has been a matter of debate since the early 1980s. In the study described in this article, measures derived from signal…

The analysis of I-scale preference orders of 71 infants (2 to 9 months old) to four face-like stimuli suggested a common J-scale stimulus ordering for each of four age groups. Changes in I-scale frequencies were used as a measure of age-related changes in preference orders. (MS)

A fundamental question of perceptual development concerns how infants come to perceive partly hidden objects as unified across a spatial gap imposed by an occluder. Much is known about the time course of development of perceptual completion during the first several months after birth, as well as some of the visual information that supports unity…

The relation between perceptual organization and categorization processes in 3- and 4-month-olds was explored. The question was whether an invariant part abstracted during category learning could interfere with Gestalt organizational processes. A 2003 study by Quinn and Schyns had reported that an initial category familiarization experience in…

Various theories are introduced to explain illusions in which the length, orientation, curvature or direction is wrongly perceived. The role of eye movements in the process of diminution is discussed. (SA)