Reviews examples from the recent psychological literature relating to object orientation and constancy. The conclusion is reached that the attempt to separate the constancy and discrimination questions in an experimental design employing only a single dependent variable fails practically and theoretically. A theoretically more acceptable…

The probable dominance of contralateral hand control and contralateral representation of auditory input are important aspects of the study of cerebral function. A musical task involving bimanual coordination allowed investigation of both the above factors in a crossed and uncrossed sensorimotor relationship. (Author)

This study examines object construction and the ages at which children developing under various environmental conditions achieve five of the landmarks in the Uzgiris-Hunt (1974) scale of object permanence. (Author)

This study investigated infants' differential responding to novel and familiar stimuli after familiarization in a different sensory modality. Results showed that infants gain information about the shape of objects from their oral experience with them and that this information can be transferred to the visual modality. (Author/JMB)

Sequences of mastery behavior were analyzed in a sample of 67 infants 6 to 12 months old. Authors computed (a) frequencies of six categories of mastery behavior, transitional probabilities, and z scores for each behavior change, and (b) transitions from a mastery behavior to positive affect. Changes in frequencies and similarity in organization…

Four experiments studied the perception of the unity and boundaries of objects by 88 4-month-old infants who manipulated them out of the visual field. Infants perceived the unity/boundaries of these objects by detecting the motion patterns they themselves produced. Discrimination between motion patterns transferred from touch to vision. (SLD)

Reports two studies of infant exploration. In the first, age and characteristics of the object stimuli influenced 6-, 9- and 12-month-olds who manipulated a series of objects. Results of the second study suggested that different kinds of manipulation are used to explore changes in shape, texture, and weight. (Author/CB)

The variety of hand grips of 12 children, most of whom were moderately or severely retarded, were classified in order to begin an analysis of hand function. Test reliability was not as great when items were presented to the children as compared to when children were observed or rated by videotape. (FG)

Five infants were studied longitudinally from 18 to 36 weeks of age to determine the extent to which infants use a predictive strategy when reaching for moving objects. (Author/DB)

Researchers observed activities of preschool children engaged in various forms of play, and focused particularly on symbolic play. (Author/DB)

Three-dimensional random polygon objects ranging in complexity between four and 40 turns were presented to the Ss, and time spent in exploration and play was measured over three successive exposure-time blocks. (Author/DLS)

Infants ranging from 6 to 12 months were randomly assigned to one of three conditions: (1) allowed to look at a specified object, (2) allowed to look at and manipulate it, or (3) allowed to look at the object and to manipulate the transparent box in which it was encased. (JMB)