Connect alternately: 1 → A → 2 → B → 3 → C... Test of cognitive flexibility.
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Solid circles = numbers · Dotted circles = letters · Alternate between them
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What is TMT-B?
Trail Making Test Part B (TMT-B) is the harder version of TMT-A. Instead of connecting numbers in order, you alternate between numbers and letters: 1 → A → 2 → B → 3 → C... This dual task intensely activates the brain's executive function : set-shifting (switching between rules), inhibition of automatic responses, and divided attention.
The difference TMT-B vs TMT-A (known as "B-A interference") is a standard neuropsychological marker for frontal deficits, frontotemporal dementia, traumatic injuries, and major depression. The larger the difference, the more pronounced the executive deficit.
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TMT-B is a digital adaptation of clinically validated neuropsychological tests. Below you will find the official sources underpinning the methodology, along with international and Romanian medical institutions you can consult for a professional assessment.
📚 Studies and clinical validation
The original scientific papers and validation studies that demonstrate this paradigm measures what it claims to measure.
🌍 Recommendations from international medical institutions
Global organisations (NIH, Mayo Clinic, Alzheimer's Association, WHO, Lancet) that recommend cognitive training as part of a healthy routine for older adults. Direct links to official documents.
If low scores recur, speak with a doctor. Here is where you can seek specialist advice in Romania — the only national Alzheimer's NGO, the relevant ministry, university neurology clinics, and accredited medical universities.
Important: This game is informational and educational. It is not a medical diagnostic tool. For a clinical assessment, consult a neurologist or psychiatrist. Repeatedly low scores are worth discussing with your GP as an indicator (similar to weighing yourself at home), not as a diagnosis.
