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PubMed1976

Distribution of practice effects on learning retention and relearning by retarded boys.

The stabilometer task was used to study the difference between massed practice and distributed practice on initial acquisition, retention, and relearning of a gross motor skill by mentally retarded boys. 72 subjects were randomly assigned to either one massed practice group or one of three distributed practice groups with varying interrial rest intervals. All subjects were retested for retention and relearning after 8 wk. of no practice. The results indicated that distributed practice was superior to massed practice for initial skill acquisition. Retention was superior, favoring the group given distributed practice, but no significant differences were found between groups for relearning, indicating that the advantage of distributed practice may be temporary and that it is a performance rather than a learning factor.

Adolescent↗
PubMed1979

Development of articulatory competence in mentally retarded children.

Mentally retarded children participated in a verbal stimulation program developed at the Institute for Psychophysiological and Speech Disorders, Belgrade, Yugoslavia. Intensive home therapy was associated with an increase in articulatory competence in both moderately and profoundly retarded children. The development of articulation differed between retardate groups as well as with the sequence of normal phonological production. The results suggest that the order in which wounds are introduced into the therapeutic program may be a critical factor in the over-all development of competent articulation.

Child↗
PubMed1979

Specificity and differences in three methods of assessing trainable mental retardates' reaction time.

The purposes of this study were to determine the specificity and differences in reaction time that exist among three manual methods of measurement. This dependent variable was measured from onset of a light stimulus until activation of a microswitch by one of the following methods: depressing or releasing a panel-mounted button or depressing a hand-held button. A rotational order of testing was implemented with 35 trainable mentally retarded subjects. Data indicated marked specificity among the three methods; reaction times were significantly faster with the depressed and hand-held methods than with the released method.

Adolescent↗
PubMed1981

Perceptual-motor learning with moderately retarded persons.

A visual-motor learning study was undertaken with 12 cultural-familial and 12 organic institutionalized retarded individuals to determine if organic signs on the Bender-Gestalt visual-motor test could be reversed. Statistically significant improvement was obtained with each group after 30 hr. of training. The results were discussed in relation to perceptual-motor regression and its potential for reversibility. Incorporating perceptual-motor regression exercises into the regular school program was suggested as an adjunct to current social and communication goals.

Education of Persons with Intellectual Disabilitie↗
PubMed1981

Effects of uncertainties of time and occurrence on reaction time of mentally handicapped students.

The purpose of this study was to determine the effects of uncertainties of time and occurrence on reaction time of mildly handicapped students. 33 students were randomly assigned to the following treatment groups: no catch-trials, 10% catch-trials, and 20% catch-trials. Randomly varied foreperiods of 1.5, 3.0, and 4.5 sec. were used in a reaction time task. The role of catch-trials varied over four days of testing. Reaction times following 3.0- and 4.5-sec. were significantly faster than measurements following a 1.5-sec. foreperiod.

Adolescent↗
PubMed1997

Rorschach cognitive developmental indices of mentally retarded persons: a comparison with scores on Wechsler Intelligence Scale for children-revised.

In a sample of 55 mentally retarded subjects (M age = 14 yr., 1 mo.) the relations between some perceptual and cognitive Rorschach indices, including the Becker's Genetic Level Score, and Wechsler Scale scores were studied. The mean Developmental Score did not increase across ages and was higher for girls than for boys, while Verbal and Performance IQs were lower for girls. The correlations confirm the hypothesis that for mentally retarded persons WISC-R scaled scores and Rorschach cognitive indices are different measures of intellective functioning. The findings are discussed with reference to the assessment and rehabilitation of retarded subjects.

Adolescent↗

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