E-ISSN : 2733-4538
An estimation of premorbid MQ is necessary to interpret the results of Rey-Kim Memory Test administered to a brain-damaged patient. The present study examined the validity of estimating premorbid Rey-Kim Memory Test MQ based on the mean FIQs of the age-and-education groups of the K-WAIS standardization sample. The data obtained from 167 normal subjects indicated that for most age-and-education groups, the mean FIQ is a reasonable estimate of the mean MQ. The difference in observed versus estimated MQ was less than 6 points in 35.3% of the subjects, less than 11 points in 63.5%, and less than 16 points in 77.8%. This error size was significantly lower than the error size associated with the method of estimating all subjects' MQs as 100. These results suggest that the present method of estimating premorbid MQ is a clinically useful one. The difference between observed versus estimated MQ, named 'pre/postmorbid MQ consistency' in the present study, may be used as an index for estimating the extent of memory decline following brain damage.