11/23/2023 0 Comments Wais r 4 digit span subtestWhile all three indices have utility as embedded PVTs, ACSS ≤ 5 may be most robust to cognitive impairment while identifying noncredible performance.Īssessment elderly/geriatrics/aging malingering/symptom validity testing. 39/.86).ĪCSS yielded better classification accuracy and sensitivity/specificity than RDS and RDS-R. 62/.95), and cognitively impaired subsample (≤4. 62/.87), cognitively unimpaired subsample (≤5. ACSS evidenced maximal sensitivity/specificity for the total sample (≤5. Lower accuracy and AUCs were observed for the valid-cognitively impaired subsample across indices, but to a greater degree for traditional RDS. (7) Digit Span, (8) Arithmetic Processing Speed (9) Symbol Search, (10) Coding. The testing performed on June 29, 1995, consisted of the remaining portions of the WAIS - R, the administration of the Wechsler Memory Scale - Revised. (4) Block Design, (5) Matrix Reasoning, (6) Visual Puzzles Working Memory. (1) Vocab, (2) Similarities, (3) Information Perceptual Reasoning. 85, and optimal cut scores of RDS ≤ 5, RDS-R ≤ 9, and ACSS ≤ 5. 88), the experimenter verbally presented an increasingly longer series of digits (spans of 2-9), at a rate of 1 digit per second, and the participant was required to. Based on 10 WAIS-IV core subtests: Verbal Comprehension. A base rate of 15 (which approximates the rate in our sample) for Digit Span ACSS cutoff of 5 yielded a PPV of 69, and an NPV of 92. RDS, RDS-R, and ACSS all significantly predicted validity group membership with respective areas under the curve (AUCs) of. Positive predictive value and NPV for Digit Span indices at noncredible effort base rates of 5, 15, 25, and 40 are displayed in Table 4. Among valid participants, 49% were cognitively impaired. Those with ≤1 criterion PVT failure were classified as valid (n = 87), whereas those with ≥2 failures were classified as noncredible (n = 26). This study compared the classification accuracy of RDS, RDS-R, and ACSS in a mixed clinical sample of relatively older (M age = 54.61) veterans with and without neurocognitive impairment.ĭuring a comprehensive neuropsychological evaluation, 113 clinically-referred veterans completed the WAIS-IV Digit Span subtest and the following criterion PVTs: Dot Counting Test, Word Choice Test, and Test of Memory Malingering. The total raw score for Digit Span is now based on Digit Span Forward, Digit Span Backward. Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) Reliable Digit Span (RDS), RDS-revised (RDS-R), and age-corrected scaled score (ACSS) are validated and commonly used embedded performance validity tests (PVTs), though existing validation studies have largely examined younger (approximate ages 19-35) patients with mild traumatic brain injury or those without cognitive impairment. Digit Span Sequencing was added to increase the working memory demands of the Digit Span subtest relative to the previous version, in response to research indicating different cognitive demands for the Digit Span Forward and Digit Span Backward tasks. It comprises 10 core subtests that yield four factor index scores (i.e., Verbal Comprehension, Perceptual Reasoning, Working Memory, and Processing Speed) as well as the full-scale IQ.
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