| Abstract: | The change in IQ scores over an extended period of time (approximately 17 years) of subjects who had been placed in classes for the Educable Mentally Handicapped was investigated. Analysis indicated that a significant difference existed between WISC scores administered at the time of initial placement (mean age, 11–9) and WAIS scores administered at a later date (mean age, 17–6). In addition, although a difference was revealed with respect to WAIS scores when the students were divided into two groups based upon initial WISC scores (?70 vs. >70), it was determined that the change was in a uniform fashion over time; i.e., neither regression nor interaction effects were detected. A final analysis revealed that those students who were located for a follow-up testing approximately 10 years later (mean age 28–8) continued to show a significant increase in IQ scores. The importance placed upon IQ scores for initial placement of students in EMH programs appears to remain suspect. |
