scholarly journals DETECTING STRESS INCIDENCE WITH WRISTBAND SENSOR-BASED DEVICE: A WAY TO SUPPORT CAREGIVERS OF PERSONS WITH DEMENTIA

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S390-S390
Author(s):  
Angela YM Leung
Keyword(s):  
Heart Rate ◽  
Experimental Study ◽  
Electrodermal Activity ◽  
Stress Test ◽  
Physiological Changes ◽  
Wearable Sensor ◽  
Stress Monitoring ◽  
Interbeat Interval ◽  
Skin Conductivity ◽  
The Mean

Abstract This experimental study aimed to investigate the sensitivity of detecting stress level with a wearable device. A total of 10 caregivers underwent a psychological stress test with a wearable sensor-based device that measured skin conductivity (Electrodermal Activity, EDA) and heart rate variability (Interbeat Interval, IBI). Two sample t-tests were used to compare the mean scores of EDA and IBI at baseline and during stress. The accuracy for classifying stress test epochs was 70%. There was a significant increase in EDA at the time when the participants were under stress [mean score (SD) at baseline vs at stress: 0.089 (SD 0.150) vs 0.427 (SD 0.430), p <0.001]. However, insignificant changes in IBI were observed. In conclusion, this wearable sensor-based device was able to recognize stress incidence and accurately capture physiological changes. It has a potential to be part of the sensor-based stress monitoring and alleviating system (SbSMA).

scholarly journals Sex Differences in Stress Reactivity to the Trier Social Stress Test in Virtual Reality

2020 ◽  
Author(s):  
Qing Liu ◽  
Wenjuan Zhang
Keyword(s):  
Heart Rate ◽  
Virtual Reality ◽  
Sex Differences ◽  
Social Stress ◽  
Stress Reactivity ◽  
Electrodermal Activity ◽  
Stress Test ◽  
Young Male ◽  
Trier Social Stress Test ◽  
Stress Group

Abstract Background: The aim of the present study is to investigate the sex differences in stress reactivity to the Trier Social Stress Test (TSST) in a virtual reality(TSST-VR). Methods: Healthy young male (n = 30) and female (n = 30) undergraduates were randomly assigned to a psychosocial stress protocol (TSST) condition or to a non-stressful control condition (Placebo-TSST) under VR. Electrodermal activity (EDA), heart rate (HR) and heart rate variability (HRV) were measured throughout the study. The subjective scales of stress and emotion were also conducted. Results: The results showed that after VR, the stress group reported higher stress perceptions than the non-stress group. Compared with females, the males stronger EDA and higher HRV before the VR, and lower HR during VR as well as higher HRV after VR. The correlation between subjective and objective reactivity demonstrated that HRV during VR was negatively correlated to depression and negative affect. The HRV after VR was negatively correlated to the positive coping but was positively correlated to the depression. Conclusions: These findings suggest that the TSST-VR could be used as an available tool for testing gender differences to social stress induction in experimental settings. Compared with females, males were more sensitive to stress.

scholarly journals An Evaluation of Speech-Based Recognition of Emotional and Physiological Markers of Stress

2021 ◽  
Vol 3 ◽  
Author(s):  
Alice Baird ◽  
Andreas Triantafyllopoulos ◽  
Sandra Zänkert ◽  
Sandra Ottl ◽  
Lukas Christ ◽  
...  
Keyword(s):  
Heart Rate ◽  
Social Stress ◽  
Short Term Memory ◽  
Stress Test ◽  
Trier Social Stress Test ◽  
Support Vector ◽  
Stress Monitoring ◽  
Test Protocol ◽  
Audio Features ◽  
Physiological Markers

Life in modern societies is fast-paced and full of stress-inducing demands. The development of stress monitoring methods is a growing area of research due to the personal and economic advantages that timely detection provides. Studies have shown that speech-based features can be utilised to robustly predict several physiological markers of stress, including emotional state, continuous heart rate, and the stress hormone, cortisol. In this contribution, we extend previous works by the authors, utilising three German language corpora including more than 100 subjects undergoing a Trier Social Stress Test protocol. We present cross-corpus and transfer learning results which explore the efficacy of the speech signal to predict three physiological markers of stress—sequentially measured saliva-based cortisol, continuous heart rate as beats per minute (BPM), and continuous respiration. For this, we extract several features from audio as well as video and apply various machine learning architectures, including a temporal context-based Long Short-Term Memory Recurrent Neural Network (LSTM-RNN). For the task of predicting cortisol levels from speech, deep learning improves on results obtained by conventional support vector regression—yielding a Spearman correlation coefficient (ρ) of 0.770 and 0.698 for cortisol measurements taken 10 and 20 min after the stress period for the two corpora applicable—showing that audio features alone are sufficient for predicting cortisol, with audiovisual fusion to an extent improving such results. We also obtain a Root Mean Square Error (RMSE) of 38 and 22 BPM for continuous heart rate prediction on the two corpora where this information is available, and a normalised RMSE (NRMSE) of 0.120 for respiration prediction (−10: 10). Both of these continuous physiological signals show to be highly effective markers of stress (based on cortisol grouping analysis), both when available as ground truth and when predicted using speech. This contribution opens up new avenues for future exploration of these signals as proxies for stress in naturalistic settings.

scholarly journals Immediate effects of psychosocial stress on attention depend on subjective experience and not directly on stress-related physiological changes

2017 ◽  
Author(s):  
I. Palacios-García ◽  
M. Villena-Gonzalez ◽  
G. Campos-Arteaga ◽  
C. Artigas-Vergara ◽  
K. Jaramillo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Salivary Cortisol ◽  
Psychosocial Stress ◽  
Subjective Experience ◽  
Stress Test ◽  
Trier Social Stress Test ◽  
Control Group ◽  
Physiological Changes ◽  
Cortisol Levels ◽  
Acute Psychosocial Stress

AbstractAcute psychosocial stress is associated with physiological, subjective and cognitive changes. In particular, attention, which is considered one of the main processes driving cognition, has been related to different stress outcomes, such as anxiety, cortisol levels and autonomic responses, individually. Nonetheless, their specific contributions to and association with attention is still not fully understood. To study this association, 42 male participants were asked to perform an attentional task just before and immediately after being exposed to either an experimental treatment designed to induce psychosocial stress using the Trier Social Stress Test (TSST) or a matching stress-free control condition. The salivary cortisol concentration, heart rate, and self-reported anxiety were measured to assess the physiological response to stress and the subjective experience during the protocol. As expected, psychosocial stress induced increases in heart rate, salivary cortisol levels and anxiety. The behavioral analysis revealed that members of the control group performed better on the attentional task after the protocol, while members of the TSST group showed no changes. Moreover, after dividing the stress group into sub-groups of participants with high and low anxiety, we observed that participants in the high-anxiety group not only failed to perform better but also performed worse. Finally, after testing several single-level mediation models, we found that anxiety is sufficient to explain the changes in attention and that it mediates the effects between heart rate and cortisol levels on attention. Our results suggest that the immediate effects of acute psychosocial stress on attention are highly dependent on the participant’s subjective experience, which, in turn, is affected and can mediate stress-related physiological changes.

scholarly journals Gender Differences in Stress Responses during a Virtual Reality Trier Social Stress Test

2019 ◽  
Vol 19 (2) ◽  
Author(s):  
Julia Santl ◽  
Youssef Shiban ◽  
Andreas Plab ◽  
Stefan Wüst ◽  
Brigitte M. Kudielka ◽  
...  
Keyword(s):  
Gender Differences ◽  
Heart Rate ◽  
Virtual Reality ◽  
Stress Responses ◽  
Social Stress ◽  
Electrodermal Activity ◽  
Stress Test ◽  
Trier Social Stress Test ◽  
Cortisol Responses ◽  
Electrodermal Reactivity

The Trier Social Stress Test (TSST) is commonly used to induce stress in laboratories by instructing participants to deliver a speech and to solve arithmetic tasks in front of a committee. Its implementation in virtual reality (VR) enables an investigation of stress responses under highly standardized controllable conditions. The aim of this study was to compare stress responses among men and women in a VR version of the TSST (VR-TSST). To this end, 16 women taking oral contraceptives and 16 men underwent the VR-TSST in a modified version including a competitor. Stress ratings, heart rate, electrodermal reactivity, and salivary cortisol responses were analyzed. The VR-TSST induced endocrine, peripher-physiological and self-reported stress responses, indicated by a significant increase in heart rate, electrodermal activity and stress ratings as well as a small but significant cortisol response. Significant gender differences were found only for stress ratings. In conclusion, these findings confirm earlier results that VR is suitable to induce social stress both in males and females.

scholarly journals The Use of Multimedia as a Distraction to Reduce Anxiety Reaction among Paediatric Patients During Cast Removal at Hospital Tengku Ampuan Afzan

2017 ◽  
Vol 16 (1) ◽  
Author(s):  
Tengku Kashfil
Keyword(s):  
Heart Rate ◽  
Experimental Study ◽  
Upper Limb ◽  
Pulse Oximeter ◽  
Control Group ◽  
Anxiety Reaction ◽  
Paediatric Patients ◽  
The Mean ◽  
Limb Fractures ◽  
Upper Limb Fractures

Introduction: Cast removal procedures can be a daunting experience for children giving rise to anxiety. The objective of this study is to measure the level of anxiety in children during cast removal at Hospital Tengku Ampuan Afzan. Materials and method: An experimental study was conducted with a sample of 40 paediatric patients with upper limb fractures and cast removal were randomly assigned into two groups: with multimedia distraction or without (control). Patient's heart rate was measured using a pulse oximeter before, during and after cast removal. Results: A total number of 20 children were randomized to multimedia distraction and another 20 to control with no distractions. The mean rise in heart rate between preprocedure and during procedure 5.3 beats/min in multimedia distraction group and 16.35 beats/min in control group (P = 0.001). The mean difference in heart rate between the pre-procedure and during the procedure was 5.64 beats/min in the multimedia distraction group and 13.13 beats/ min in the control group (P = 0.05). Conclusion: There was significant decrease in heart rate during cast removal with multimedia distraction. Therefore multimedia distraction is a useful tool in reducing anxiety among children during cast removal.

Heart rate in atrial fibrillation can be regulated by neurostimulation: results of an experimental study

2006 ◽  
Vol 54 (S 1) ◽  
Author(s):  
M Schmid ◽  
S Christiansen ◽  
G Langebartels ◽  
K Mischke ◽  
M Zarse ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Heart Rate ◽  
Experimental Study

Psychophysiological Responses of Pilots in Hypoxia Training at 7000 and 7500 m

2020 ◽  
Vol 91 (10) ◽  
pp. 785-789
Author(s):  
Dongqing Wen ◽  
Lei Tu ◽  
Guiyou Wang ◽  
Zhao Gu ◽  
Weiru Shi ◽  
...  
Keyword(s):  
Heart Rate ◽  
Psychomotor Performance ◽  
Physiological Responses ◽  
Arterial Oxygen Saturation ◽  
Arterial Oxygen ◽  
Awareness Training ◽  
Similar Frequency ◽  
Psychophysiological Responses ◽  
The Mean ◽  
Training Protocol

INTRODUCTION: We compared the physiological responses, psychomotor performances, and hypoxia symptoms between 7000 m and 7500 m (23,000 and 24,600 ft) exposure to develop a safer hypoxia training protocol.METHODS: In altitude chamber, 66 male pilots were exposed to 7000 and 7500 m. Heart rate and arterial oxygen saturation were continuously monitored. Psychomotor performance was assessed using the computational task. The hypoxic symptoms were investigated by a questionnaire.RESULTS: The mean duration time of hypoxia was 323.0 56.5 s at 7000 m and 218.2 63.3 s at 7500 m. The 6-min hypoxia training was completed by 57.6% of the pilots and 6.1% of the pilots at 7000 m and at 7500 m, respectively. There were no significant differences in pilots heart rates and psychomotor performance between the two exposures. The Spo2 response at 7500 m was slightly severer than that at 7000 m. During the 7000 m exposure, pilots experienced almost the same symptoms and similar frequency order as those during the 7500 m exposure.CONCLUSIONS: There were concordant symptoms, psychomotor performance, and very similar physiological responses between 7000 m and 7500 m during hypoxia training. The results indicated that 7000-m hypoxia awareness training might be an alternative to 7500-m hypoxia training with lower DCS risk and longer experience time.Wen D, Tu L, Wang G, Gu Z, Shi W, Liu X. Psychophysiological responses of pilots in hypoxia training at 7000 and 7500 m. Aerosp Med Hum Perform. 2020; 91(10):785789.

scholarly journals Experimental study on the mean flow characteristics of a supersonic multiple jet configuration

2021 ◽  
Vol 108 ◽  
pp. 106377
Author(s):  
Mohammed Faheem ◽  
Aqib Khan ◽  
Rakesh Kumar ◽  
Sher Afghan Khan ◽  
Waqar Asrar ◽  
...  
Keyword(s):  
Experimental Study ◽  
Flow Characteristics ◽  
Mean Flow ◽  
The Mean
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