Lee Ashendorf

Modeling uncertainty in performance validity testing with Bayesian logistic regression

Lee Ashendorf

Objective: The aggregation of multiple performance validity tests (PVTs) into a summary validity determination is an established challenge in neuropsychology. The standard dichotomous accumulation approach relies upon binary recoding of continuous PVT scores and yields ambiguous outcomes in a sizable proportion of …

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Simple to Complex

Lee Ashendorf, Susanne Withrow

AIM: The popularity of the Clock Drawing Test (CDT) is paralleled by the multitude of scoring systems ranging from brief and subjective to complex. METHODS: To compare the properties and classification accuracy of different scoring approaches, the CDT was scored using 14 …

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Cross-validation of verbal fluency measures as embedded performance validity tests in a clinical sample

Keith Johnson, Lee Ashendorf

= 73). Classification accuracy was examined for COWAT and Animal Naming raw scores, demographically adjusted T-scores, and two previously published logistic regression models. Both verbal fluency measures significantly differentiated credible from non-credible groups. Optimal indices utilized COWAT raw scores, either alone or …

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Rey-Osterrieth Complex Figure copy scoring systems in a dementia clinic sample

Lee Ashendorf, Brad Taylor, Megan M. Kelly

Objective: This study compared and contrasted the various achievement-based scoring systems—guidelines assessing accuracy and placement of details—and process-based scoring systems—those which assess organization and drawing approach—for the copy trial of the Rey-Osterrieth Complex Figure Test. Method: A sample of 90 US military …

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Precision neurocognition: An emerging diagnostic paradigm leveraging digital cognitive assessment technology

David J. Libon, Rodney Swenson, Dianne Langford, Stephanie Cosentino et autres

is a heuristic that seeks to develop methodologies capable of identifying subtle behavior(s) that may flag emerging AD and other dementia related syndromes. Recent research suggests that digital neuropsychological assessment technology may be the platform that can realize the goals of precision …

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The Neuropsychological Assessment Battery Driving Scenes Test in a Dementia Clinic

Lee Ashendorf, Susanne Withrow, Brandon E. Gavett

OBJECTIVE: In dementia research, the Driving Scenes test from the Neuropsychological Assessment Battery has been shown to relate to memory, dementia diagnosis, and functional impairment. The aim of the current study was to examine Driving Scenes and its component scores, and their …

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85 Performance Consistency on a Measure of Sustained and Selective Attention

Lauren M. Baumann, Keith P. Johnson, Lee Ashendorf

Objective: Attention concerns, particularly difficulties with focusing and regulating attention, are reported in diverse clinical contexts. The Ruff 2&7 Selective Attention Test (Ruff 2&7; Ruff & Allen, 1996) is a measure of sustained and selective attention that assesses automatic detection and effortful …

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85 Use of Embedded Performance Validity Measures Using Verbal Fluency Tests in a Clinical Sample of Military Veterans

Keith P. Johnson, Lee Ashendorf, Lauren M. Baumann

Objective: As neuropsychologists aim to collect valid data, maximize the utility of assessments, make effective use of time, and best serve patient populations, measurement of performance validity is considered a critical issue for the field. As effort may vary across an evaluation, …

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Decision rules for an abbreviated administration of the Test of Memory Malingering

Lee Ashendorf, Susanne Withrow, Sarah Ward, Sara Sullivan et autres

The present study investigated abbreviation methods for the Test of Memory Malingering (TOMM) in relation to traditional manual-based test cutoffs and independently derived more stringent cutoffs suggested by recent research (≤48 on Trial 2 or 3). Consecutively referred outpatient U.S. military veterans …

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When is it appropriate to infer cognitive impairment on the basis of premorbid IQ estimates? A simulation study.

Brandon E. Gavett, Lee Ashendorf, Sid E. O’Bryant

Whether an individual meets psychometric criteria for cognitive impairment is dictated by the comparison criterion, which is typically either a normative mean or a known or estimated previous level of ability. This study investigated the conditions under which adjusting normative expectations based …

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The Rey 15-Item Memory Test in US veterans

Lee Ashendorf, Erika L. Clark, Clare T. Humphreys

INTRODUCTION: The Rey 15-item Test is a public-domain, memory-based performance validity test, frequently used in clinical settings. Various efforts have been made to modify the test to make it more sensitive and more robust to effects of lower education and intelligence. The …

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Neurological, Psychiatric, and Affective Aspects of Dementia in Latinxs

Lee Ashendorf, Julie E. Horwitz

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