We introduce statistical methods for prediction of types of human movement based on three tri-axial accelerometers worn simultaneously at the hip, left, and right wrist. We compare the individual performance of the three accelerometers using movelets and propose a new prediction algorithm that integrates the information from all three accelerometers. The development is motivated by a study of 20 older subjects who were instructed to perform 15 different types of activities during in-laboratory sessions. The differences in the prediction performance for different activity types among the three accelerometers reveal subtle yet important insights into how the intrinsic physical features of human movements could be effectively utilized in prediction. The proposed integrative movelet method takes into account those findings to augment the prediction accuracy and improve our understanding of human movement measurements.
He, Bing; Bai, Jiawei; Koster, Annemarie; Paolo, Casserotti; Glynn, Nancy; Harris, Tamara B.; and Crainiceanu, Ciprian, "PREDICTING HUMAN MOVEMENT TYPE BASED ON MULTIPLE ACCELEROMETERS USING MOVELETS" (March 2013). Johns Hopkins University, Dept. of Biostatistics Working Papers. Working Paper 251.