Citation

Smith DM, Abtahi M, Amiri AM, Mankodiya K. Annu. Int. Conf. IEEE Eng. Med. Biol. Soc. 2016; 2016: 5335-5338.

Copyright

(Copyright © 2016, IEEE (Institute of Electrical and Electronics Engineers))

DOI

10.1109/EMBC.2016.7591932

PMID

28269465

Abstract

Heart rate (HR) and electrodermal activity (EDA) are often used as physiological measures of psychological arousal in various neuropsychology experiments. In this exploratory study, we analyze HR and EDA data collected from four participants, each with a history of suicidal tendencies, during a cognitive task known as the Paced Auditory Serial Addition Test (PASAT). A central aim of this investigation is to guide future research by assessing heterogeneity in the population of individuals with suicidal tendencies. Using a state-space modeling approach to time series analysis, we evaluate the effect of an exogenous input, i.e., the stimulus presentation rate which was increased systematically during the experimental task. Participants differed in several parameters characterizing the way in which psychological arousal was experienced during the task. Increasing the stimulus presentation rate was associated with an increase in EDA in participants 2 and 4. The effect on HR was positive for participant 2 and negative for participants 3 and 4. We discuss future directions in light of the heterogeneity in the population indicated by these findings.

Language: en

Keywords

Humans; Adult; Female; Male; Suicide; Young Adult; Neuropsychological Tests; Arousal; Models, Biological; Psychophysiology; Galvanic Skin Response; Interrupted Time Series Analysis; Heart Rate