Distance perception as a function of age

Age changes in the veridicality of judgments up to 600 cm away from the observers were tested in 30 subjects in three groups ranging from 5 years to adults. Using the method of adjustment matching judgments were made, distally from the subject, of a standard length placed at his feet. All subjects exhibited underconstancy with a decrease in variability and an increase in the accuracy of judgments with increasing age. A shift in the veridicality of distance perception was found to have taken place between the 5 to 7 year and the 9 to 11 year old groups. 1976 Australian Psychological Society