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Futterman, Ann Dee; Arndt, Stephan – American Journal of Mental Deficiency, 1983
The construct and predictive validity of adaptive behavior was investigated using a multitrait multimethod analysis with 66 mentally retarded institutionalized persons. Adaptive behavior had high convergent validity and low discriminant validity and predicted MA program placement better than did MA, suggesting that adaptive behavior scores could…
Descriptors: Adaptive Behavior (of Disabled), Mental Age, Mental Retardation, Placement

Carroll, John B. – Merrill-Palmer Quarterly, 1982
Despite Spitz's (1982) contention that his conclusions are necessarily in conflict with those arising from factor analysis, this article demonstrates how results from factor analysis can provide insights into data he cites. (Author/MP)
Descriptors: Data Analysis, Factor Analysis, Gifted, Mental Age
Peled, M.; Iarocci, G.; Connolly, D. A. – Journal of Intellectual Disability Research, 2004
Background Individuals with intellectual disability (ID) are more vulnerable to abuse compared to individuals without disabilities yet have limited access to the legal system. This study examined perceived credibility of youth with mild intellectual disability (MID) who provide courtroom testimony. Method Participants, 187 undergraduates, were…
Descriptors: Mental Age, Credibility, Mild Mental Retardation, Court Litigation
Ypsilanti, A.; Grouios, G.; Alevriadou, A.; Tsapkini, K. – Journal of Intellectual Disability Research, 2005
Williams (WS) and Down syndromes (DS) are two genetic disorders that involve intellectual disability (ID) and have been extensively studied over the past decades because of the unique linguistic profiles they exhibit. Recent investigations seek to explore the fractionation of linguistic components within the cognitive system using genetically…
Descriptors: Profiles, Investigations, Definitions, Mental Age

Mullins, Marc; Rincover, Arnold – Journal of Experimental Child Psychology, 1985
Compared to mental and chronological age-matched groups of normal children, six autistic children (1) did not maximize reinforcement; (2) sampled less, and less efficiently; and (3) were much less responsive to extinction. Autistic sampling behavior was redirected by stimulus change. Results are viewed as perhaps causally related to many…
Descriptors: Autism, Children, Chronological Age, Comparative Analysis
Wiegel-Crump, Carole – Education and Training of the Mentally Retarded, 1981
Results demonstrated that when compared with normally developing children of the same mental age, the Down's syndrome Ss (6 to 12 years old) evidenced a more homogeneous pattern of syntactic usage and tended to acquire only low-level syntactic structures, as identified by the Developmental Sentence Scoring procedure. (Author)
Descriptors: Downs Syndrome, Elementary Education, Grammar, Institutionalized Persons

Zajonc, R. B.; And Others – American Sociological Review, 1991
Responds to "Birth Order and Intelligence: Further Tests of the Confluence Model" by Robert D. Retherford and William H. Sewell. Reviews their arguments and suggests that their analyses of the Wisconsin Longitudinal Study data support rather than contradict the model. (CJS)
Descriptors: Birth Order, Intelligence Differences, Longitudinal Studies, Mathematical Models

Hauser-Cram, Penny – Child Development, 1996
Compared mastery motivation on 2 tasks for 1- and 2-year-old children--25 with motor impairment, 25 with developmental delays, and 25 with typical development, but all matched for mental age. Found that the groups did not differ on any measure of mastery motivation. (MDM)
Descriptors: Developmental Delays, Mastery Learning, Mental Age, Motivation
Abbeduto, L.; Short-Meyerson, K.; Benson, G.; Dolish, J. – Journal of Intellectual Disability Research, 2004
The present study was designed to evaluate the validity of the false belief task as a measure of theory of mind development in individuals with intellectual disability (ID). In most if it variants, the false belief task is linguistically demanding. This raises the possibility that the finding that individuals with ID do poorly on it might reflect…
Descriptors: Program Effectiveness, Language Skills, Adolescents, Validity
Cunningham, Cliff; Glenn, Sheila – International Journal of Disability Development and Education, 2004
The limited literature on awareness of differences and stigma in people with intellectual disabilities is largely sociological, emphasises pathology, and has rarely used a developmental perspective with representative samples. Interviews, photographs and standardised tests were used to investigate such awareness with 77 young adults with Down…
Descriptors: Young Adults, Mental Age, Coping, Down Syndrome

Lempers, J.; And Others – Merrill-Palmer Quarterly, 1987
Compares gifted preschool boys and girls with both a CA (Chronological Age)-matched group and an MA (Mental Age)-matched group on their performance on a spatial projective task, a cognitive perspective-taking task, and an affective perspective-taking task. The data seem to support the hypothesis that psychometric brightness implies cognitive…
Descriptors: Children, Chronological Age, Intelligence Quotient, Mental Age
Glass, Gene V. – J Educ Psychol, 1969
Reprints from: Gene V. Glass, Laboratory of Educational Research, University of Colorado, Boulder, Colorado 80302.
Descriptors: Age, Hypothesis Testing, Intelligence Quotient, Learning
Rohwer, William D.; Jensen, Arthur R. – J Educ Psychol, 1969
Reprints from: Arthur R. Jensen, School of Education, University of California, Berkeley, California 94720.
Descriptors: Age, Hypothesis Testing, Intelligence Quotient, Learning

Spitz, Herman H. – Merrill-Palmer Quarterly, 1982
Studies comparing the strengths and weaknesses of intellectually retarded and superior groups are reviewed, with particular attention given to studies in which these extreme groups were matched with each other on mental age. (Author)
Descriptors: Comparative Analysis, Gifted, Individual Characteristics, Intellectual Development
McCann, Joanne; Peppe, Susan; Gibbon, Fiona E.; O'Hare, Anne; Rutherford, Marion – International Journal of Language & Communication Disorders, 2007
Background: Disordered expressive prosody is a widely reported characteristic of individuals with autism. Despite this, it has received little attention in the literature and the few studies that have addressed it have not described its relationship to other aspects of communication. Aims: To determine the nature and relationship of expressive and…
Descriptors: Comprehension, Mental Age, Phonology, Autism