Between- and Within-subject Variability in Actigraphy Data: A Case Study on Sleep Patterns in Schizophrenia
Jinyuan Liu, Hanchang Cai, Zhichao Zhang, Jiawei Wang, Ellen E. Lee, Xinlian Zhang
The paper introduces a mixed-effects location-scale model to analyze variability in longitudinal actigraphy data, showing that modeling both mean and variability improves understanding of sleep patterns in schizophrenia.
bioRxiv · Feb 9, 2026 · PreprintNeuroscience