The Trail Making Test (TMT) is a simple tool that can be used to screen fordementia.
The test is conducted in two parts, each with its specific aims and purposes.
This article outlines the history of the Trail Making Test and explains how it is administered and scored.
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All of these abilities are a part of what is known asexecutive functioning.
A marked loss or decline of these abilities may be an indication of cognitive impairment.
The TMT is timed and performed in two parts using only a pen and a piece of paper.
The lines between the circles are referred to as the “trail.”
It does not require specialist training to administer but is conducted in a specific way to ensure accuracy.
Scoring
The Trail Making Test is scored based on how long it takes to complete the test.
There are no penalties for mistakes other than they extend the final recorded time.
The scores are the number of seconds it takes to complete a test.
Each part of the test is scored individually.
Higher scores indicate a higher degree of cognitive impairment.
The test has shown good diagnostic accuracy in evaluating a person’s cognitive functioning.
TMT Part A is a good measure ofworking memory.
With that said, the accuracy of the TMT can vary based on what condition is being investigated.
The Oral Trail Making Test
The Trail Making Test can also be administered verbally.
Depending on the aims of testing, it may not be the right choice for everyone or every situation.
The test is easy and quick to administer.
The test does not require specialist training to administer.
The test can be performed anywhere.
The test offers relatively high accuracy in detecting cognitive impairment.
Older age can skew the results if adjustments are not made.
The test accuracy can vary based on the condition being diagnosed.
Misdiagnosis is possible in borderline cases if specialist interpretation is not sought.
It is conducted in two parts using only a pen and a piece of paper.
Part A of the test requires you to connect 25 randomly placed circles in ascending numerical order.
The test is scored based on how many seconds it takes you to complete each part.
Higher scores indicate a higher degree of cognitive impairment.
The TMT is most beneficial when used as part of a comprehensivepanel of screening testsby a qualified healthcare provider.
Frequently Asked Questions
The Trail Making Test (TMT) takes less than five minutes to complete.
Longer times may be an indication of cognitive impairment.
The test can be used to diagnose dementia and other cognitive disorders.
Symptoms, types, and diagnosis.
