Abilities of 2-, 5-, and 7-year-old children to interpret, judge acceptability of, and produce class extensions were assessed. It was concluded that increasing ability to deal appropriately with class extensions is primarily due to general advances in language acquisition rather than to any development unique to the class-extension word-formation…

Examined whether a holistic magnitude relation governs children's object comparisons. Objects varying on two dimensions of magnitude, size, and saturation were classified by three-, four-, and five-year-olds. Results indicated that younger children were sensitive to global magnitude as well as to overall similarity. (Author/BE)

Three experiments tested for developmental changes in attention to auditory and visual signals. Results showed that adults and seven-year-olds tended to allocate their attention to vision rather than audition when no precue was provided. While not entirely consistent, results with four-year-olds suggested a similar biasing of attention to vision.…

Capacity to react to the cost of a request in relation to interlocutor's behavior is acquired early; ability to maintain good interactions by increasing the politeness of a request occurs later. Only from 9 years on do children use linguistic politeness as a criterion in judging a request's appropriateness according to addressee's status. (RH)

Despite assertions to the contrary, preschool children are capable of understanding cinematic events conveyed through camera techniques and film editing. This ability nevertheless substantially increases with age among children from four- to seven-years-old. (Author/RH)

Acquisition of sentient-nonsentient distinction in 48 children between four- and seven-years-of-age occurred later than animate-inanimate distinction. The children's use of naturalistic or nonnaturalistic explanations depended on the logical nature of events in which objects were involved rather than familiarity with objects themselves. Ability to…

Describes a new observational study of home television viewing by young children which involved placement of time-lapse video cameras in the homes of five-year-olds from middle-class families for a 10-day period. Families maintained TV viewing diaries, and control groups of families were employed to assess the impact of observational equipment in…

Activity of 50 children whose motility had been monitored by an electronic activity monitor when they were neonates was again monitored by an ambulatory microcomputer when they were four to eight years old. Results are consistent with evidence from several longitudinal studies suggesting that individual activity characteristics tend to persist…

The study examined adult-child interactions during conversation with respect to the effects of adult paralinguistic speech variations on the speech production of four four-year-old children. Analysis indicated that each child's response time latency (RTL) was significantly longer when the experimenter's RTL was longer. (Author/DB)

Discusses the theory of self-efficacy, the ways in which young children learn self-care and self-efficacy, and methods parents and other caregivers can use to encourage self-efficacy in young children. (RJC)

To identify the most potent reinforcers for 10 young children with attention deficit hyperactivity disorder, the relative treatment utility of a verbal forced-choice questionnaire, child nomination, and direct observation was evaluated. Results demonstrated that all three methods were more likely to disagree than agree and that a forced-choice…

This study examined speech disfluency clusters in the speech of 60 3- to 6-year-old children, half of whom stuttered. Results indicated that the children who stuttered produced significantly more "stuttering-stuttering" clusters and significantly more "stuttering-repair" clusters, whereas nonstutterers never produced "stuttering-stuttering"…

The phonological competence of 4 children, ages 5-7 years old, with a diagnosis of developmental apraxia of speech (DAS), was contrasted to that of 4 normal children. The DAS children revealed a severe deficit in rhyming ability. Results suggest that DAS is a fundamental disorder of the segmental phonological level of language. (Author/DB)

This study examined how five normally developing two-year-old children manage the relationship between phonetic production and production of word combinations in their spontaneous speech. Results revealed tradeoffs between complexity of word combinations and both accuracy of consonant production and phonetic complexity of individual lexical items.…

Three experiments with young children and adults were performed to examine the development of frequency selectivity and to attempt to separate peripheral versus central contributions to frequency selectivity. Results suggested that the shallow notched-noise, fixed-masker-level functions of four-year-old children are probably a result of poor…