Twenty-eight five- and seven-year-old children were reinforced for key pressing according to a DRL (differential reinforcement of low rates) five-second schedule of reinforcement. (Author)

In Skinner's analysis of verbal behavior, three categories of environmental control over instances of verbal behavior appear to be relevant to the study of infant vocal development: the mand, the tact, and the echoic categories. Procedures used in the remediation of language deficiencies and procedures found in work in the area of language…

Competence in action perception seems to be achieved very early in life. Because research has indicated that competent perceivers of action must be able to discriminate breakpoints in behavior, then recognition memory for breakpoints should be superior to that for nonbreakpoints at all ages where competence in action perception exists. Two studies…

Recent literature on the acquisition of "more" and "less" is reviewed with special emphasis on some key issues. The overriding goal of studies in this area has been the discovery of the developmental sequence that the child follows in acquiring "more" and "less," and, more generally, all comparative structures. The earliest empirical studies on…

Six groups of nursery schoolers, kindergarteners, and first graders balanced for sex were trained and tested on a series of discrimination learning and transposition problems. (Author)

Nonsense forms with nonsense labels were utilized in a match to sample task to observe whether children's word extensions are based on static form characteristics or on functional action characteristics. The stimuli consisted of: (1) a single model object which performed an action; (2) a selection array consisting of one object similar in form to…

Three studies explore the development of discrimination and memory for symmetry in preschoolers four to six years of age. Issues addressed include the young child's ability to discriminate and reproduce symmetry, and the effects of pattern orientation and complexity on the young child's symmetry discrimination and reproduction. Results indicate…

Forty students, grades 4 and 8, were given match-to-sample tests on Western art, to gauge their ability to recognize paintings by the same artist. Eighth-graders performed reliably better than fourth-graders, and their matching justifications were more advanced. Prior artistic experiences improved style sensitivity. (SJL)

This study, with 161 children with and without language learning problems, tested the hypothesis that as children's language development matures, factor-analytic structural changes occur that are associated with measurements of fine-grained auditory discrimination, receptive vocabulary, receptive language, speech production, and 3 performance…

This discussion of the development of children's competency in nonverbal communication is divided into three major sections; (1) review of literature, (2) methodological concerns, (3) implications for teachers. The review of literature focuses on post-1970 studies using non-institutionalized children. Findings are organized according to…

Piaget's model of children's conceptual learning and development was compared with Klausmeier's Conceptual Learning and Development (CLD) model in a longitudinal study. The CLD model suggests four successive levels of concept learning: (1) concrete--recognizing an object which has been encountered previously; (2) identity--recognizing a known…