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Related Experiment Videos

Construct validity in the Trail Making Test: what makes Part B harder?

E A Gaudino1, M W Geisler, N K Squires

  • 1State University of New York, Stony Brook 11794-2500, USA.

Journal of Clinical and Experimental Neuropsychology
|August 1, 1995
PubMed
Summary
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The Trail Making Test (TMT) Part B is harder than Part A due to increased cognitive demands, motor speed, and visual search requirements. This study explored variations to understand these differences in performance.

Area of Science:

  • Neuropsychology
  • Cognitive Psychology
  • Human Factors

Background:

  • The Trail Making Test (TMT) assesses motor speed and visual attention.
  • Part A involves connecting consecutive numbers, while Part B alternates between numbers and letters.

Purpose of the Study:

  • To investigate the factors contributing to the increased difficulty of Trail Making Test Part B compared to Part A.
  • To analyze variations of the TMT to understand performance differences.

Main Methods:

  • Forty college students completed four forms of the Trail Making Test.
  • Performance metrics including completion time, path length, and visual interference were assessed.

Main Results:

  • Trail Making Test Part B (numbers only) took longer than standard Part A.

Related Experiment Videos

  • Part B exhibited a longer path (56 cm) and greater visual interference than Part A.
  • Increased cognitive load, motor speed, and visual search demands were identified in Part B.

    • Conclusions:

    • Trail Making Test Part B's difficulty stems from both cognitive complexity and enhanced motor and visual demands.
    • Understanding these factors is crucial for accurate neuropsychological assessment.