Executive Function
Trail Making Test
Tests your ability to switch between mental sets. Connect numbers in order, then alternate between numbers and letters.
What does the Trail Making Test measure?
It measures executive function across two parts: Part A tests visual sequencing speed by connecting numbered circles in order; Part B tests cognitive flexibility by requiring you to alternate between numbers and letters (1, A, 2, B…). The switching cost between parts is the primary executive measure.
How should you interpret your Trail Making result?
The Part B time minus Part A time (the switching cost) is more informative than either time alone. A low switching cost means set shifting added little overhead — your mental flexibility is efficient. Switching errors on Part B are particularly informative because they reveal lapses in rule maintenance rather than just speed.
How does set shifting connect to learning?
Studying often requires fast switching without losing the thread: moving between a prompt, a rule, an example, feedback, and the next retrieval cue. Strong set shifting helps you change mental lanes while preserving sequence — essential for problem solving, exam pacing, and multi-subject review sessions.
Why does Vidbyte include the Trail Making Test?
The TMT is one of the most clinically validated executive function measures available, used in neuropsychology for decades. Vidbyte includes a browser-adapted version because cognitive flexibility and sequencing speed directly affect how efficiently a learner can move between study activities without error accumulation.
Research basis
Research Basis
Reitan 1958
The Trail Making Test became central in the Halstead-Reitan neuropsychological battery.
Cognitive abilities in trail making
Trail making reflects processing speed, fluid abilities, visual scanning, sequencing, and shifting.
Executive function and development
Trail performance relates to distributed prefrontal networks and executive abilities relevant to academic outcomes.
Trail Making Test norms
Tombaugh provides age and education norms for Trail Making Test Part A and Part B performance.
Trail interpretation review
Bowie and Harvey review Trail Making Test administration, scoring, and interpretation in clinical research.