This volume presents the findings of a large-scale study of individual differences in spoken (and heard) language development during the school years. The goal of the study was to investigate the degree to which language abilities at school entry were stable over time and influential in the child's overall success in important aspects of…

Challenges the notion that long-term memory retrieval efficiency is a potential source of individual and developmental differences in cognitive functioning. Fourth-grade, eighth-grade, and college-aged subjects participated in a task using the Posner letter matching paradigm and were assessed with tests of verbal and spatial ability. (Author/CB)

Examines the interplay between genes and environment and argues that the development of much individual variation can be explained in terms of relatively simple forms of underlying regulation. Looks at "sensitive periods," during which variation is produced by experience received at a particular age. Includes a discussion of the…

Criteria for defining event-frequency encoding as automatic were assessed in two experiments involving young children, college students, elderly, and mentally retarded persons. The first experiment used an online word-frequency task; the second used a study-test method with pictures as stimuli. (PCB)

Sensitivity to reinforcement contingencies was examined in six individuals with mental retardation using a concurrent operants procedure in the context of a computer game. Results included individual differences in sensitivity and differential sensitivity to rate and magnitude variation. Results suggest that comprehensive assessments of potential…

Three studies explored age, sex, and individual differences in children's defensiveness about four feelings: happiness, anger, sadness, and fear. Also investigated was the relation between children's defensiveness and their mothers' comfort with and expression of feelings. Participants included children ranging in age from 4 through 11 years of…

A choice assessment was used to categorize reinforcers as high, middle, and low preference with 4 males (ages 7 to 19) with multiple disabilities including severe/profound mental retardation. High-preference stimuli consistently functioned as reinforcers for all subjects whereas low-preference stimuli did not function as reinforcers. (Author/DB)

Accuracy-disabled and rate-disabled young Canadian readers were compared to children who were "fluent normal" readers. Children in the latter group decoded at the same level of accuracy as the rate-disabled subjects but at a significantly faster rate. Specific deficiencies of each of the disabled groups were identified. (Author/RH)

Points out that the world of television activates, cultivates, and alters the gender schemata that children bring to the viewing situation. Finds that viewing can also promote creation of new schemata or modification of existing ones. (Author/RWB)

Supports the position that although individual differences have often been ignored, children do differ in the stereotyping of their gender identities and attitudes (gender schemata). Stresses that children with traditionally stereotyped gender schemata process information about gender differently from children who have less stereotyped schemata.…

Sign language production of 14 low-functioning students (ages 9 to 20) with autistic disorder were examined. The location aspect of signs was produced more accurately by subjects than either the handshape or movement aspects. Wide individual differences were observed. Sign vocabulary size and accuracy was correlated with performance on two…

Examines questions related to whether children with severe learning disabilities go through the same developmental stages as children without such problems, or whether they develop along different lines. Explores the "delay" versus "deviance" issue in relation to linguistic development in children with Down's syndrome. Looks…

Although the events associated with divorce can have negative effects on children who are involved, child maladjustment is not the inevitable consequence of divorce. To investigate the factors which may account for observed variation in children's response to divorce, 46 elementary school children (22 boys, 24 girls), residing with their mothers,…

A study was conducted to investigate the comprehensibility of microcomputer-generated color graphics that are displayed on monochromatic monitors. Subjects were 64 second, third, and fourth graders who were randomly assigned to one of two conditions. Children in the first treatment were asked to identify, on a monochrome monitor, a figure that was…