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ACM Interact. Mob. Wearable Ubiquitous Technol."],"published-print":{"date-parts":[[2018,3,26]]},"abstract":"<jats:p>Depression is a common mood disorder that causes severe medical problems and interferes negatively with daily life. Identifying human behavior patterns that are predictive or indicative of depressive disorder is important. Clinical diagnosis of depression relies on costly clinician assessment using survey instruments which may not objectively reflect the fluctuation of daily behavior. Self-administered surveys, such as the Quick Inventory of Depressive Symptomatology (QIDS) commonly used to monitor depression, may show disparities from clinical decision. Smartphones provide easy access to many behavioral parameters, and Fitbit wrist bands are becoming another important tool to assess variables such as heart rates and sleep efficiency that are complementary to smartphone sensors. However, data used to identify depression indicators have been limited to a single platform either iPhone, or Android, or Fitbit alone due to the variation in their methods of data collection. The present work represents a large-scale effort to collect and integrate data from mobile phones, wearable devices, and self reports in depression analysis by designing a new machine learning approach. This approach constructs sparse mappings from sensing variables collected by various tools to two separate targets: self-reported QIDS scores and clinical assessment of depression severity. We propose a so-called heterogeneous multi-task feature learning method that jointly builds inference models for related tasks but of different types including classification and regression tasks. The proposed method was evaluated using data collected from 103 college students and could predict the QIDS score with an R2 reaching 0.44 and depression severity with an F1-score as high as 0.77. By imposing appropriate regularizers, our approach identified strong depression indicators such as time staying at home and total time asleep.<\/jats:p>","DOI":"10.1145\/3191753","type":"journal-article","created":{"date-parts":[[2018,3,27]],"date-time":"2018-03-27T12:06:45Z","timestamp":1522152405000},"page":"1-21","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":81,"title":["Joint Modeling of Heterogeneous Sensing Data for Depression Assessment via Multi-task Learning"],"prefix":"10.1145","volume":"2","author":[{"given":"Jin","family":"Lu","sequence":"first","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]},{"given":"Chao","family":"Shang","sequence":"additional","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]},{"given":"Chaoqun","family":"Yue","sequence":"additional","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]},{"given":"Reynaldo","family":"Morillo","sequence":"additional","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]},{"given":"Shweta","family":"Ware","sequence":"additional","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]},{"given":"Jayesh","family":"Kamath","sequence":"additional","affiliation":[{"name":"University of Connecticut Health Center, Department of Psychiatry, Farmington, CT, USA"}]},{"given":"Athanasios","family":"Bamis","sequence":"additional","affiliation":[{"name":"Amazon, Inc., Cambridge, MA, USA"}]},{"given":"Alexander","family":"Russell","sequence":"additional","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]},{"given":"Bing","family":"Wang","sequence":"additional","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]},{"given":"Jinbo","family":"Bi","sequence":"additional","affiliation":[{"name":"University of Connecticut, Department of Computer Science and Engineering, Storrs, CT, USA"}]}],"member":"320","published-online":{"date-parts":[[2018,3,26]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"National Center for Injury Prevention and Control","author":"Centers for Disease Control and Prevention.","year":"2010","unstructured":"Centers for Disease Control and Prevention. 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