The K-D test measures the speed of rapid number naming and saccadic eye movements to evaluate concussion, multiple sclerosis, Parkinson's disease and other neurological conditions. The test involves reading aloud a series of single-digit numbers from left to right on 3 test cards.

Average time for:
1. Controls 46 seconds
2. Concussion ~50.8 seconds
Sensitivity: 86% and Specificity: 90%
Meta-Analysis by: Galetta et al. 2016