Two experiments used object-manipulation tasks to examine whether one- to two-year-olds form superordinate-like categories by attending to object parts. Findings indicated that 14- and 18-month-olds behaved systematically toward categories with different, but not matching, parts. Without part differences, none formed superordinate categories.…

This study was designed to examine the relationship between conceptions of ability and understandings of the meaning of effort. Participants practiced a novel task and completed an ability conceptions questionnaire prior to instruction and a meaning of effort survey after practicing the task. The majority of participants believed in the efficacy…

The smaller size and lower strength level of children may indicate that adaptations of sport-type games, such as basketball, are necessary to maximize skill performance. Children between the ages of 9.0 and 12.7 years were given two subtests of the Alliance for Health, Physical Education, and Recreation Skills Test, the Speed Pass and Front Shot.…

The purpose of this study was to longitudinally examine the development of symbolic play in 2-year-old Japanese infants. The subjects were four children who were individually tested once a month from the age of 12 to 24 months in laboratory settings. Assessment materials consisted of three sets of miniature toys, a doll and junk objects. Each set…

Two studies involving stereotypic hand gazing revealed that: (1) a dramatically increased therapy program substantially reduced a 35.4 month-old boy's hand gazing and augmented his toy manipulation skills; and (2) both glasses and toys effectively reduced hand gazing by two visually impaired 30.3 and 17.9 month-old children. (Author/CB)

Forty right-handed high school and college students were trained to operate calculators with their left hands. Results suggest the possibility of improving office machine operating speed, without significant loss of accuracy, by instructing trainees to operate the keyboard with the alternate hand while recording information with the dominant hand.…

Examines the issue of object sorting in early infancy. Forty-eight infants at 6, 9, and 12 months were presented with eight sets of small, manipulable objects. At six months, selective manipulation was absent; at nine months, 94 percent of the infants sequentially touched similar objects and at 12 months 100 percent did so. (Author/DB)

Findings indicated that (1) stable preference measures could be obtained, (2) high preference objects resulted in higher motivation to perform and hence higher levels on each scale, (3) performance of this population is not stable, and (4) ordinality was violated in nearly 20 percent of the administrations of the scales. (Author)

Evaluated 9-, 14-, and 19-month olds' strategies as they grasped and used spoons presented with the handle alternately oriented to left or right. Found that younger children reached with their preferred hand, disregarding the item's orientation. Older children anticipated the problem, alternated the hand used, and achieved an efficient radial grip…

Examined infants' ability to retrieve an object from atop a slightly larger object. Found that even 5-month-olds could retrieve objects close in size and fully contiguous with their bases when demands on reaching skill were reduced. Proposed that when they fail this task, it is because they lack the skill to reach the top object without…

To determine the effects of pencil shape and size on motor accuracy and pencil posture of eight-year-old children, a study randomly assigned 54 third grade school children to one of three experimental conditions: (1) using a standard 2B pencil, (2) using a 1.5 cm thick 2B pencil, and (3) using the standard 2B pencil with the attachment of an…

This study investigated the effects of novelty on young children's exploration of commonplace, 3-dimensional objects. The exploration of novel and familiar objects was compared and the pattern of the exploration of the novel object over a period of time was examined in order to test two hypotheses: (1) that novel objects elicit more exploration…

Two experiments using college students established links between desired knowledge about objects and hand movements during haptic object exploration. Subjects were either blindfolded or had their hands restrained, while performing matching tasks. Hand movements were studied during performance of exploratory procedures. (GDC)

Tested infants in their second year with a box task to determine whether they would show a hand preference in solutions involving complete differentiation of roles for the two hands. (HOD)

Compares the manipulative exploration of objects of 30 nine-month-old preterm infants with that of 20 nine-month-old full-term infants. Although no difference between the preterms and the full terms was noted, a high-risk preterm subgroup manipulated objects less. A relationship was found between manipulative exploration at nine months and later…