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Lowering the Floor on Trail Making Test Part B: Psychometric Evidence for a New Scoring Metric

Lowering the Floor on Trail Making Test Part B: Psychometric Evidence for a New Scoring Metric The Trail Making Test Part B (TMT-B) is widely used in clinical and research settings as a measure of executive function. Standard administration allows a maximal time score (i.e., floor score) of 300 s. This practice potentially masks performance variability among cognitively impaired individuals who cannot complete the task. For example, performances that are nearly complete receive the same 300-s score as a performance of only a few moves. Such performance differences may have utility in research and clinical settings. To address this, we propose a new TMT-B efficiency metric designed to capture clinically relevant performance variability below the standard administration floor. Our metric takes into account time, correct moves, and errors of commission and omission. We demonstrate that the metric has concurrent validity, permits statistical analysis of performances that fall below the test floor, and captures clinically relevant performance variability missed by alternative methods. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Clinical Neuropsychology Oxford University Press

Lowering the Floor on Trail Making Test Part B: Psychometric Evidence for a New Scoring Metric

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References (30)

Publisher
Oxford University Press
Copyright
Published by Oxford University Press 2015. This work is written by (a) US Government employee(s) and is in the public domain in the US.
ISSN
0887-6177
eISSN
1873-5843
DOI
10.1093/arclin/acv040
pmid
26164816
Publisher site
See Article on Publisher Site

Abstract

The Trail Making Test Part B (TMT-B) is widely used in clinical and research settings as a measure of executive function. Standard administration allows a maximal time score (i.e., floor score) of 300 s. This practice potentially masks performance variability among cognitively impaired individuals who cannot complete the task. For example, performances that are nearly complete receive the same 300-s score as a performance of only a few moves. Such performance differences may have utility in research and clinical settings. To address this, we propose a new TMT-B efficiency metric designed to capture clinically relevant performance variability below the standard administration floor. Our metric takes into account time, correct moves, and errors of commission and omission. We demonstrate that the metric has concurrent validity, permits statistical analysis of performances that fall below the test floor, and captures clinically relevant performance variability missed by alternative methods.

Journal

Archives of Clinical Neuropsychology – Oxford University Press

Published: Nov 11, 2015

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