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Related Experiment Videos

The RBANS Effort Index: base rates in geriatric samples.

Kevin Duff¹, Cynthia C Spering, Sid E O'Bryant

¹Center for Alzheimer's Care, Imaging and Research, Department of Neurology, University of Utah, Salt Lake City, Utah 84108, USA. kevin.duff@hsc.utah.edu

Applied Neuropsychology

|March 11, 2011

Summary

This summary is machine-generated.

The Effort Index (EI) may unfairly flag older adults with dementia for poor effort. Age, education, and cognitive status impact EI scores, requiring careful interpretation in geriatric patients.

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Area of Science:

Neuropsychology
Geriatric Medicine
Cognitive Assessment

Background:

The RBANS Effort Index (EI) aids in distinguishing genuine cognitive impairment from poor effort.
Concerns exist that the EI may disproportionately penalize older adults due to its use of uncorrected raw scores.

Purpose of the Study:

To investigate the base rates of Effort Index failure in geriatric populations.
To determine if age, education, and cognitive functioning influence Effort Index scores in older adults.

Main Methods:

Analysis of five independent samples of geriatric patients with varying cognitive abilities.
Calculation of base rates for Effort Index failure across different cognitive strata.
Examination of correlations between Effort Index scores and demographic/cognitive variables.

Main Results:

In cognitively intact and mildly impaired older adults, few were classified as demonstrating poor effort (approx. 3%).
Among severely impaired geriatric patients (nursing home residents, probable Alzheimer's disease), over one-third exceeded EI cutoff scores (33-37%).
Older age, lower education, and poorer overall cognitive functioning were associated with higher rates of suspected poor effort on the EI.

Conclusions:

The Effort Index's interpretation in older adults requires careful consideration of age, education, and cognitive status.
Caution is advised when using the Effort Index with elderly individuals, particularly those suspected of dementia, due to potential confounding factors.