Remote cognitive assessment after stroke

After a stroke, many people have cognitive problems that a short clinic screen can miss. Hand weakness makes it worse: on standard tests, slow or clumsy responses can look like poor thinking.

Stroke survivors completed Cognitron's IC3 battery, supervised and unsupervised, and 171 were followed for up to two years. Cognitron's scoring models the timing of every response, so it can separate cognitive ability from the time taken to see, move, and respond.

Cognitron found deficits in patients the MoCA scored as normal (26 or above out of 30), and explained around twice as much of patients' real-world functional impairment and quality of life.

Standard scores were distorted by hand motor impairment on 10 of 18 tasks. Cognitron's corrected measures showed no distortion and matched pen-and-paper clinical tests more closely (mean R-squared 0.65 vs 0.43). Results were equivalent whether tested supervised or at home, with minimal practice effects.