Physiological Evaluation of Mental Workload in Time Pressure

Hioki, Kyu; Nozawa, Akio; Mizuno, Tota; Ide, Hideto

doi:10.1541/ieejeiss.127.1000

Cited by 20 publications

(12 citation statements)

References 6 publications

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“…Overall, VAS score increased by the task and decreased after the task indicating that the calculation task functioned as a stressor, as previously reported [16][17][18][19]. No significant difference in the VAS score was observed between the control condition and any of the aroma conditions.…”

Section: Subjective Impressions and Vas Scoressupporting

confidence: 80%

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Psychophysiological Effects of Aroma Inhalation during a Short-term Cognitive Stressor: A Preliminary Study using Eight Different Aromas

Lekamge

Nakachi

Sato

et al. 2017

IJAE

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Abstract:We investigated the psychophysiological effects of eight different aromas under a short-term stressor, in a within-subject experiment using an olfactometer. In this preliminary study, 6 male university students performed a 30-min calculation task under the aroma conditions: Chocolate, Strawberry, Green tea, Apple, Citrus ginger, Chamomile, Cedarwood, Musk or dipropylene glycol (control). Each aroma was intermittently delivered using a proprietary olfactometer on separate experiment days. Along with a visual analogue scale for psychological assessment, skin conductance level and electrocardiograms were recorded throughout the experiment. The increase/decrease in heart rate and high-frequency component of heart rate variability during the task were inhibited by Cedarwood, Strawberry, Green tea, Apple, and Citrus ginger, demonstrating inhibitory effects on cardiac sympathetic nervous system elevation and parasympathetic nervous system suppression. While identifying some prominent aromas for further research, the study revealed a stimulus-specific nature of aroma which led to discrepant psychophysiological effects.

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Section: Subjective Impressions and Vas Scoressupporting

confidence: 80%

“…Even though the calculation task is simple, it requires sustained concentration and attention. Therefore, it has been frequently used for inducing acute stress in previous studies [16][17][18][19].…”

Section: Methodsmentioning

confidence: 99%

Psychophysiological Effects of Aroma Inhalation during a Short-term Cognitive Stressor: A Preliminary Study using Eight Different Aromas

Lekamge

Nakachi

Sato

et al. 2017

IJAE

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show abstract

“…Under the control condition, the VAS scores for frustration, effort, fatigue and boredom were signi cantly higher at T than at R1 (p < 0.001 to < 0.05), indicating that the simple calculation task functioned as a stressor, as reported previously [12,14,16].…”

Section: Vas Scoressupporting

confidence: 79%

“…Although the calculations are very simple, the task requires sustained concentration and attention. Therefore, this task is frequently used to induce acute stress in various studies [12,14,16].…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, the skin temperature at the site of interest can be measured as an index of sympathetic nervous system activity [9,10]. In particular, the temperature at the tip of the nose has been used as an objective measure of psychological stress [11][12][13][14][15]. To our knowledge, few olfactory studies have assessed skin temperature to estimate peripheral autonomic nervous system activity.…”

Section: Introductionmentioning

confidence: 99%

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Enhancement of Autonomic Stress Response and Reduction of Subjective Stress by Lavender Inhalation During a Short-term Calculation Task

Nomura

Maeyama

Ito

2016

ABE

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We investigated the effects of two prominent aromas, lavender and jasmine, on peripheral and cardiac autonomic nervous system activity under stressful conditions, in a highly reproducible manner using an olfactometer. The subjects comprised 17 healthy men aged 20-24 years. In this within-subjects study design, all subjects were required to perform a simple calculation task for 30 min to induce cognitive stress, and aroma from lavender or jasmine essential oil or a control stimulus was inhaled intermittently ( rst 20 s of each 1-min interval) to prevent olfactory fatigue. The control stimulus was provided by triethyl citrate, an odourless solvent. In addition to subjective psychological assessments using a visual analogue scale, the temperature at the tip of the nose and cardiac activity on electrocardiogram were recorded as indices of peripheral and cardiac autonomic nervous system activities, respectively. Signi cant decreases in nose tip temperature and high-frequency (HF) component of heart rate variability (HRV), and a signi cant increase in heart rate were observed under all three conditions. However, compared with the control condition, lavender inhalation induced signi cantly greater decreases in nose tip temperature (p < 0.01) and HF component of HRV (p < 0.01), which indicated greater enhancement of sympathetic nervous system activity and suppression of parasympathetic nervous system activity. On the other hand, lavender inhalation induced a positive mood, less subjective stress, and increased concentration during the task (p < 0.01). These contradictory results of enhanced physiological stress response and lower subjective stress induced by lavender inhalation under stressful conditions suggest that lavender aroma may have effects other than sedation. Further studies are necessary to further clarify these effects.

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Alleviation of the acute stress response following mild orange essential oil administration

Lekamge

Nakachi

Sato

et al. 2017

IEEJ Transactions Elec Engng

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We investigated the effect of two different concentrations of orange aroma on peripheral and cardiac autonomic nervous system activity under a stressful condition in a highly reproducible manner. In the within‐subjects experiment, 19 subjects performed a 30‐min calculation task under three aroma conditions: 1% orange, 20% orange, and scentless air (control). Each aroma was delivered to the subject intermittently with the use of a proprietary olfactometer in a counter‐balanced order. Along with a visual analog scale (VAS), nose tip temperature and the cardiac activity on electrocardiograms were recorded throughout the experiment. Regardless of the aroma condition, significant decreases in nose tip temperature and the high‐frequency (HF) component of heart rate variability (HRV) and a significant increase in heart rate (HR) were observed during the task, denoting a typical acute stress response. However, the increase/decrease in HR and HF were significantly smaller with 1% orange than with 20% orange and the control condition, indicating an inhibition of sympathetic nervous system elevation and parasympathetic nervous system suppression. There were no significant differences between the two doses for the VAS scores. The findings suggest that mild orange essential oil inhalation inhibits the cardiac stress response while demonstrating no significant effect on subjective stress. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Physiological Evaluation of Mental Workload in Time Pressure

Cited by 20 publications

References 6 publications

Psychophysiological Effects of Aroma Inhalation during a Short-term Cognitive Stressor: A Preliminary Study using Eight Different Aromas

Psychophysiological Effects of Aroma Inhalation during a Short-term Cognitive Stressor: A Preliminary Study using Eight Different Aromas

Enhancement of Autonomic Stress Response and Reduction of Subjective Stress by Lavender Inhalation During a Short-term Calculation Task

Alleviation of the acute stress response following mild orange essential oil administration

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