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Michael D Chafetz

Publications and source records attributed to Michael D Chafetz.

2 recordsLinked to original sources

Malingering on the Social Security disability consultative exam: a new rating scale.

In disability examinations, benefits may depend on the findings of a psychological consultative examination (PCE), which in Louisiana usually involves a mental status examination and a Wechsler Scale. The disability determinations service (DDS) requires a warning that failure to do one's best may result in an unfavorable decision on the claim, but psychologists are officially discouraged from determining effort by the use of formal effort tests. Consequently, there is a need for internal indicators of effort. Formal testing of effort was undertaken in order to identify indicators of effort within the PCE in WAIS-age and WISC-age claimants. Our findings indicated that the total score of indicators was more predictive of effort than any single indicator. Regression equations yielded information on how much effort contributes to IQ. Classification accuracy for the new rating scale was described for a "dose-response" of effort. Disincentives for malingering detection in the PCE were identified.

Adolescent↗

A new interference score for the Stroop test.

A New interference calculation method for the Stroop test was developed based upon a neuropsychological model of the suppression of word reading in favor of color naming. Polynomial regression equations show a significant relationship between word reading and the New interference score that closely fits the underlying prediction of the New model, while the Golden [Stroop Color and Word Test, Stoelting Co., IL, Wood Dale, 1978] model (Old) produces only a random relationship. Constructs of developmental maturation and lateralized brain damage are supported by the New but not the Old method. The New compared to the Old method also gives a significant reduction in scores in a small sample of demented patients. It would be advisable to use this New model in both cognitive and neuropsychological comparisons of different lesions or different stimulus and response demands. The New model will also help promote finer clinical inferences when an understanding relative to the patient's own baselines is necessary.

Adolescent↗