Validation
Sway is dedicated to building the most accurate and validated concussion management tools on the market. We accomplish this through:
Designed for Accuracy
Cognitive testing on a mobile device typically leverages touch detection, which uses projected-capacitive touch screens. Touch is detected through a cyclical “searching”, which presents concerns over consistency across devices and variable latency cycles depending on when the touch event occurred in the cycle. Sway’s patented motion measures provide more accurate measures that are consistent across iOS and Android.
Extensive Testing
All Sway cognitive tests undergo rigorous validation with high-speed cameras and third-party validation against gold standards. High speed cameras capture test accuracy to one millisecond, providing the highest level of accuracy available in mobile cognitive testing.
Reliability
Accuracy and consistency are both critical to the value of Sway‘s balance product. Reliability was shown in clinical studies analyzing test-retest variability in independent research studies of 30, 57, and 75 subjects. These results demonstrated strong test-retest reliability after an initial familiarization trial.
Force Platform Comparison
Sway has been repeatedly validated against force platform technology, the current gold standard for postural sway assessment. Sway was also better at differentiating between progressively more difficult balance conditions in third-party research studies.
BESS Comparison
The Sway Balance assessment has shown strong agreement (r > 0.83) with the Balance Error Scoring System (BESS) in laboratory settings, however the low inter-rater reliability associated with BESS makes it a challenge to implement. Sway is an effective sideline tool due to its objective metrics, simple user interface, and the time it takes to complete a test.
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