This paper reports on an experiment designed to collect data on children's perception and use of semantic attributes. Forty-five children ranging in age from 2 years 8 months to 6 years were given a picture test involving judgment of similarities between objects. The test consisted of 47 groups of pictures; each group contained a stimulus or a card and a set of two to three additional pictures on a page, all sharing an equal number of attributes with the stimulus. The subjects were divided into two groups. The first group looked at a stimulus and then pointed to the picture most like it. The second group was given nonsense names for each stimulus, such as "bork," and was then asked to identify another "bork." The features explored were: shape, size, color, texture/material, sound, function, situation, detail shape, pattern, age, sex, mass, real, animate, human, and species. It has been proposed that the earliest features a child attends to are perceptual. The results of the present study, described in detail here, seem to suggest that no preferential hierarchy exists among various perceptual categories. Whether shape, size, or color, etc. will be the most salient feature may depend on a particular context, namely what the respective values of the competing features are. (Author/PMP)