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Related Experiment Videos

Analysis of errors on the Trail Making Test.

L E Klusman1, L I Cripe, C B Dodrill

  • 1Madigan Army Medical Center, Tacoma, Washington.

Perceptual and Motor Skills
|June 1, 1989
PubMed
Summary

The Trail Making Test (TMT) did not show significant differences in error types or frequency between head-injured patients and normal controls. However, time scores effectively differentiated the two groups, confirming their clinical utility.

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Area of Science:

  • Neuropsychology
  • Neurology
  • Cognitive Psychology

Background:

  • The Trail Making Test (TMT) is a widely used neuropsychological assessment.
  • Understanding error patterns in TMT may offer insights into cognitive deficits following head injury.
  • Previous research has explored TMT performance in various clinical populations.

Purpose of the Study:

  • To investigate if specific error types and frequencies on the TMT differentiate individuals with head injuries from healthy controls.
  • To analyze shifting and sequencing errors on Part B of the TMT.
  • To assess the clinical utility of TMT error analysis versus time scores in head-injured populations.

Main Methods:

  • A cohort of 133 head-injured patients and 145 normal control subjects were administered the TMT.
  • Errors on TMT Parts A and B were meticulously categorized.
  • Part B errors were classified into shifting (number-to-letter, letter-to-number) and sequencing (number, letter) types.

Main Results:

  • No significant differences were found in the overall frequency or types of errors between head-injured and control groups.
  • The percentage of subjects committing errors did not differ significantly between the groups.
  • While head-injured subjects showed a slightly higher tendency for letter-to-number shifting errors, this was not clinically significant.

Conclusions:

  • Error analysis on the Trail Making Test does not reliably differentiate head-injured individuals from healthy controls.
  • The discriminative value of TMT time completion scores between these groups was reaffirmed.
  • Clinical assessment of head injury should prioritize TMT time performance over detailed error analysis.

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