When older siblings were present with infants and their mothers in the backyard of a private home, the infants went further from their mothers, traversed a larger area of the yard, left their mothers more quickly, and stayed away longer. (RH)

Presents new ideas for using buttons, beans, and beads as teaching manipulatives for elementary school children. The ideas include a button scavenger hunt, a button count, a cup puppet bean game, a numbers guessing game with beans in jars, and a bead stringing activity. (SM)

Presents two primary-level peer tutoring field studies and suggests ways to implement peer tutoring in a classroom. Lesson planning, students' journal writing, manipulative activities, and students' responses are discussed. Among the benefits of peer tutoring are enhanced self-esteem, enhanced sense of responsibility, improvement of skills,…

The authors used state-trace methodology to investigate whether a single dimension (e.g., strength) is sufficient to account for recall and judgments of learning (JOLs) or whether multiple dimensions (e.g., intrinsic and extrinsic factors) are needed. The authors separately manipulated the independent variables of intrinsic and extrinsic cues,…

Previous studies on ball catching have had the limitation that the catcher was restricted to lateral hand movements. The authors investigated catching behavior in the more natural situation in which hand movements were unconstrained. Movements of the hand were tracked as participants tried to "catch" an approaching ball simulated with changing…

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)