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Trail Making Test A and B: normative data stratified by age and education
1Psychology Department, Carleton University, 1125 Colonel By Drive, Ottawa, Ont., Canada K1S 5B6. ttombaug@ccs.carleton.ca
Summary
New normative data for the Trail Making Test (TMT) A and B are available for adults aged 18-89. Performance declines with age and lower education, necessitating stratified norms for accurate neuropsychological assessments.
Area of Science:
- Neuropsychology
- Cognitive Psychology
- Gerontology
Background:
- The Trail Making Test (TMT) is a widely used neuropsychological tool.
- Existing normative data may not adequately account for demographic variations.
- Accurate norms are crucial for interpreting cognitive performance.
Purpose of the Study:
- To establish comprehensive normative data for the TMT A and B.
- To stratify norms based on age and education levels.
- To enhance the precision of TMT performance interpretation in clinical settings.
Main Methods:
- Collected data from 911 community-dwelling individuals.
- Administered Trail Making Test A and B.
- Stratified normative data by age (11 groups) and education (2 levels).
Main Results:
- Trail Making Test performance decreased with increasing age.
- Lower levels of education were associated with poorer TMT performance.
- Developed stratified age- and education-specific norms.
Conclusions:
- The new, comprehensive TMT norms improve diagnostic accuracy.
- Stratification by age and education is essential for valid interpretation.
- These norms will aid neuropsychologists in identifying cognitive impairment across diverse populations.