Sperry (1961) and others working on split brain learning reported that the two halves function in a nearly identical manner, giving excellent controlled replication of a learning problem. The present experiments were carried out with cats trained in a tactile discrimination apparatus, sometimes being forced to use the left paw, and sometimes being…

The results of a group of studies, the objective of which was to clarify the conditions that account for the effectiveness of verbal approbation, are reported. Among the most significant findings were: (1) that the reinforcement properties of verbal approval are susceptible to distortion, misinterpretation or enhancement and must be applied in a…

Ninety-six children, divided by age (five, six, seven, and eight years) and sex into equal groups, were administered tests of discrimination between leaves, association of leaves with pictures of leaves, sorting leaves into generic groups, and communication of concepts of leaf structure. No sex differences or interactions were found, but there was…

The relationships among the perception, representation, and construction of series are examined within a model of the acquisition of seriation abilities. The model is then related to two experiments with three-, four- and five-year-olds. The key feature of the model is the delineation of parallels among developmental changes in three arenas:…

Provided in the second of two articles is further evidence of the validity of the author's sequence of tactual discrimination tasks for partial development of Optacon use readiness in young blind children. (IM)

The relation between conceptual development and visual exploratory behavior was investigated by engaging eighty-four 3-, 4-, and 8-year-old children in a picture-sorting task to determine whether they would spontaneously and readily discriminate between animate and inanimate objects. (Author/JMB)

Eight severely retarded subjects (ages 9-22), four with functional language and four without, performed identity and nonidentity matching tasks employing objects, photographs, and line drawings. As representational complexity increased, greater difficulty in matching stimuli was observed in the nonfunctional language group, with line drawings…

To estimate the relative effects of three types and three combinations of feedback on children's discrimination learning, a meta-analysis was performed on the findings of 89 studies. In general, reward compared to punishment or to reward plus punishment is the least efficient method of feedback for teaching children discrimination materials.…

Results revealed that (1) relevant verbal experience facilitated learning only for preschoolers, (2) irrelevant verbal experience did not interfere with learning, and (3) visual highlighting exerted no significant effects. (Author/MB)

In this paper some behavioral indices of attachment are defined and some of the factors that affect its development are considered. (Editor)

Two training experiments were conducted to assess whether teaching grade 3 and 4 children to engage in comparison activity improves their referential communication performance (identifying a particular referent for a listerner) and message appraisal and production. Results demonstrated that comparison training improved childrens' referential…