@article{ref1,
title="Capturing behavioral indicators of persecutory ideation using mobile technology",
journal="Journal of psychiatric research",
year="2019",
author="Buck, Benjamin and Hallgren, Kevin A. and Scherer, Emily and Brian, Rachel and Wang, Rui and Wang, Weichen and Campbell, Andrew and Choudhury, Tanzeem and Hauser, Marta and Kane, John M. and Ben-Zeev, Dror",
volume="116",
number="",
pages="112-117",
abstract="Most existing measures of persecutory ideation (PI) rely on infrequent in-person visits, and this limits their ability to assess rapid changes or real-world functioning. Mobile health (mHealth) technology may address these limitations. Little is known about passively sensed behavioral indicators associated with PI. In the current study, sixty-two participants with schizophrenia spectrum disorders completed momentary assessments of PI on a smartphone that also passively collected behavioral data for one year. <br><br>RESULTS suggested that PI was prevalent (n = 50, 82% of sample) but had infrequent incidence (25.2% of EMA responses). PI was also associated with changes in several passively sensed variables, including decreases in distance traveled (M<sub>kilometers</sub> = -1.20, SD = 18.88), time spent in a vehicle (M<sub>minutes</sub> = -4.15, SD = 49.59), length of outgoing phone calls (M<sub>minutes</sub> = -0.79, SD = 13.13), time spent proximal to human speech (M<sub>minutes</sub> = -6.26, SD = 153.03), and an increase in time sitting still (M<sub>minutes</sub> = 4.04, SD = 94.69). The present study suggests changes associated with PI may be detectable by passive sensors, including reductions in moving or traveling, and time spent around others or in self-initiated phone conversations. These constructs might constitute risk for PI.<br><br>Published by Elsevier Ltd.<p /> <p>Language: en</p>",
language="en",
issn="0022-3956",
doi="10.1016/j.jpsychires.2019.06.002",
url="http://dx.doi.org/10.1016/j.jpsychires.2019.06.002"
}