Simple as it may sound, the K-D test actually does a better job of detecting concussions (with a 92 percent success rate) than two better-known methods: a “timed tandem gait test” similar to a walk-the-line test (87 percent), and a cognitive test known as the Standardized Assessment of Concussion (68 percent).
While the success rate of the King-Devick test is impressive, Balcer emphasized to HuffPost that if possible, parents should have their child perform all three of the above-mentioned concussion tests when he or she takes a hard hit. The reason could not be more clear. In tandem, the three tests can detect concussions at a rate that is truly hard to believe — 100 percent.
