Descriptor
| Age Differences | 1 |
| Genetics | 1 |
| Intelligence Quotient | 1 |
| Longitudinal Studies | 1 |
| Males | 1 |
| Mild Mental Retardation | 1 |
| Moderate Mental Retardation | 1 |
| Severe Mental Retardation | 1 |
Source
| American Journal of Mental… | 1 |
Author
| Lachiewicz, Ave M. | 1 |
Publication Type
| Journal Articles | 1 |
| Reports - Evaluative | 1 |
Education Level
Audience
| Researchers | 1 |
Location
Laws, Policies, & Programs
Assessments and Surveys
What Works Clearinghouse Rating
Peer reviewedLachiewicz, Ave M.; And Others – American Journal of Mental Retardation, 1987
Retrospective longitudinal data on 21 boys with the fragile X syndrome were analyzed. Results indicated that 13 of the boys showed a significant decline in intelligence quotient at retest, suggesting that while young boys with this syndrome may be only mildly retarded, adults are usually moderately to severely retarded. (Author/DB)
Descriptors: Age Differences, Genetics, Intelligence Quotient, Longitudinal Studies
