Emotional factors were studied in 30 adults with Down's syndrome, 18 controls with Alzheimer disease, and 25 elderly controls without mental retardation. Primary emotional factors separating Down's syndrome and Alzheimer disease groups from elderly control subjects without mental retardation were indifference, pragnosia, and inappropriateness.…

Children (ages 9 and 14) with mild mental retardation and matched controls without mental retardation were given a test of their ability to perceive relations among different stimuli and transfer learned behavior from familiar to less familiar environments. Results showed that subjects with retardation relied only on prototype information, whereas…

Twenty individuals (ages 8-18) with mental retardation and 20 controls matched for nonverbal mental age were assessed on receptive language level and nonverbal cognitive functioning. Results indicate that the nondisabled group placed less emphasis on the formal, sequential properties of language and more on semantic, conceptual properties.…

Performance on working memory span tasks by 53 children with intellectual disabilities (ages 11-12) was compared to 45 age-matched and 41 mental-age matched controls. Although consistency was poorer than children age-matched on all tasks, performance of subjects exceeded mental-age matched controls on visuo-spatial short-term storage and…

Visual scanning patterns of 17 students with mental retardation and control groups matched for chronological or mental age were recorded during visuomotor tasks. Results suggested that subjects paid more attention to penpoints than to the succeeding or passed points of a model line, indicating that they have a poorer ability to process more than…

The arm tremor of adults (n=32) diagnosed as having mental retardation and/or tardive dyskinesia was examined through an analysis of the acceleration properties of several arm postures. The degree of arm acceleration was increased in all subjects compared to a control group without mental retardation. Effects of neuroleptic medication were noted.…

A study compared the implicit learning of 58 children (ages 7-14) with mental retardation and 53 controls (ages 3-8). Individuals with mental retardation modified their behavior after an implicit training procedure similar to the controls. The effect of implicit learning did not vary as a function of IQ or age. (Contains references.) (Author/CR)

Findings of three studies indicate that young children with Down syndrome perform similarly to typical controls matched on mental ages (MAs) of approximately 3 years. However, by developmental age of 4 years, children with Down syndrome performed worse than both MA-matched typical children and children with non-Down syndrome types of mental…

The study of variance in observers assessing movement control in children with mild mental retardation found that observers who received informal training needed to observe twice as many trials to reach an acceptable standard of reliability compared to the observers who received competency-based training. (Author/DB)

This introductory paper covers basic concepts and terminology relevant to the application of research on relational learning to mental retardation. The paper discusses conditional discrimination; conditional stimulus relations and stimulus equivalence; generalized stimulus relations; impact of mediational processes on emergent behavior; relational…

Toddlers with Down's syndrome (n=42) were presented with situations in which the primary focus alternated between an object stimulus and a social stimulus. The experimental subjects monitored their environment in the same manner as did the 25 control subjects (matched for mental age) during object mastery but had a more focused attention style…

The study, with 32 adolescents with mild mental retardation and controls, found that imagery practice facilitated the execution of the reaction time component of a motor task and sometimes facilitated performance of the movement time component of the motor task. (DB)

The hypothesis that mental retardation is associated with specific deficits in decoding facially expressed emotions was tested with 16 adult subjects with mild to moderate mental retardation and control subjects matched for either chronological or mental age. Experimental subjects were significantly less accurate on the emotion task than both…

Comparison for memory for spatial location of 30 persons with and 30 persons without mental retardation found the control group recalled more intentionally learned than incidentally learned locations. The experimental group performed better after incidental learning than after intentional learning and scored as highly as controls on incidental…

Stress, coping, perceptions of control, and psychological distress of 88 adults with mild mental retardation were assessed. Stressful interpersonal interactions and concerns over personal competencies occurred most frequently. Frequency and stress impact were positively associated with a composite score of psychological distress. Active coping was…