@Article{info:doi/10.2196/16880,
author="Miyashita, Hirotaka
and Nakamura, Mitsuteru
and Svensson, Akiko Kishi
and Nakamura, Masahiro
and Tokuno, Shinichi
and Chung, Ung-Il
and Svensson, Thomas",
title="Association Between Electroencephalogram-Derived Sleep Measures and the Change of Emotional Status Analyzed Using Voice Patterns: Observational Pilot Study",
journal="JMIR Form Res",
year="2020",
month="Jun",
day="9",
volume="4",
number="6",
pages="e16880",
keywords="voice analysis; emotional status; vitality; sleep; mobile phone",
abstract="Background: Measuring emotional status objectively is challenging, but voice pattern analysis has been reported to be useful in the study of emotion. Objective: The purpose of this pilot study was to investigate the association between specific sleep measures and the change of emotional status based on voice patterns measured before and after nighttime sleep. Methods: A total of 20 volunteers were recruited. Their objective sleep measures were obtained using a portable single-channel electroencephalogram system, and their emotional status was assessed using MIMOSYS, a smartphone app analyzing voice patterns. The study analyzed 73 sleep episodes from 18 participants for the association between the change of emotional status following nighttime sleep ($\Delta$vitality) and specific sleep measures. Results: A significant association was identified between total sleep time and $\Delta$vitality (regression coefficient: 0.036, P=.008). A significant inverse association was also found between sleep onset latency and $\Delta$vitality (regression coefficient: --0.026, P=.001). There was no significant association between $\Delta$vitality and sleep efficiency or number of awakenings. Conclusions: Total sleep time and sleep onset latency are significantly associated with $\Delta$vitality, which indicates a change of emotional status following nighttime sleep. This is the first study to report the association between the emotional status assessed using voice pattern and specific sleep measures. ",
issn="2561-326X",
doi="10.2196/16880",
url="https://formative.jmir.org/2020/6/e16880",
url="https://doi.org/10.2196/16880",
url="http://www.ncbi.nlm.nih.gov/pubmed/32515745"
}