抄録
CM-006
Paradox in Validating Consumer Wearable Activity Trackers on Measuring Sleep Quality
ジールー リャン(The Univ. of Tokyo)・マリオ チャパ(CAC)
We present a paradox that we discovered in validating a consumer activity tracker Fitbit on measuring sleep quality. The sleep measurements by Fitbit were compared to both subjective and objective sleep quality. The results reveal that Fitbit may not correlate to objective sleep measures, but rather agree well to subjective ones. Depending on whether subjective or objective sleep quality is taken as the ground truth, Fitbit may both be valid and invalid, leading to a paradox that could be explained by the discrepancy between objective and subjective sleep quality. We argue that future validation studies should properly address this paradox.