How This Test Works
What It Measures
Tests visual search speed, scanning, and cognitive flexibility. Part A connects numbered circles sequentially. Part B alternates between numbers and letters (1-A-2-B-...), requiring task-switching between two cognitive sets.
How Scoring Works
Score is the time to complete each part. Part B typically takes 1.5-2x longer due to cognitive switching cost. Your TMT ratio (B/A) indicates cognitive flexibility — lower ratios are better.
What Affects Your Results
Your visual scanning speed, ability to alternate between cognitive sets, working memory, and focus under time pressure all affect your trail-making performance.