Abstract
Mattis Dementia Rating Scale (MDRS) test results for a heterogeneous sample of 185 patients, aged 47-95, were subjected to confirmatory factor analysis. We assessed the goodness-of-fit of one- to five-factor models, using conceptual groupings of items based upon prevailing neuropsychological practice. A two-factor model (verbal/nonverbal) fit the data as well as or better than other multi-factorial models, including the five-subtest scheme. In each model, the factors were highly intercorrelated, suggesting that they were largely overlapping but separable. The MDRS Conceptualization and Memory subtests correlated at +1.00, indicating that they are not separable. In addition, two items (name writing, imitating movements) did not load on any factors, due to restricted variance. These findings indicate that a more parsimonious interpretation of test results, using the verbal/nonverbal dimensions, may be warranted, particularly for screening purposes in heterogeneous populations. Suggestions are provided for improving the utility of the MDRS.
Original language | English (US) |
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Pages (from-to) | 451-461 |
Number of pages | 11 |
Journal | Clinical Neuropsychologist |
Volume | 8 |
Issue number | 4 |
DOIs | |
State | Published - 1994 |
Externally published | Yes |
ASJC Scopus subject areas
- Neuropsychology and Physiological Psychology
- Developmental and Educational Psychology
- Arts and Humanities (miscellaneous)
- Clinical Psychology
- Psychiatry and Mental health