Related Experiment Video
Updated: Mar 21, 2026
07:26
Assessment of Stress Effects on Cognitive Flexibility using an Operant Strategy Shifting Paradigm
Published on: May 4, 2020
4.1K
Dissecting Driver Behaviors Under Cognitive, Emotional, Sensorimotor, and Mixed Stressors
I Pavlidis1, M Dcosta1, S Taamneh1
1Computational Physiology Laboratory, University of Houston, Houston, Texas 77204, USA.
Scientific Reports
|May 13, 2016
Summary
Cognitive and emotional stressors improved driver safety by enhancing coping mechanisms, while sensorimotor distractions impaired performance. Mixed stressors showed complex effects on driver arousal and steering.
Area of Science:
- Psychology
- Human Factors
- Traffic Safety
Background:
- Driver stress significantly impacts arousal and performance.
- Understanding stressor effects is crucial for road safety.
- Cognitive, emotional, and sensorimotor factors influence driving behavior.
Purpose of the Study:
- To investigate the differential effects of cognitive, emotional, sensorimotor, and mixed stressors on driver arousal and performance.
- To analyze changes in steering behavior and lane departures under various stress conditions.
- To explore the underlying coping mechanisms and their limitations.
Main Methods:
- A simulation experiment involving 59 drivers balanced for age and gender.
- Measurement of sympathetic arousal, absolute steering, and lane departure range.
- Comparison of stressor effects against a baseline condition.
Main Results:
- All stressors increased sympathetic arousal and absolute steering.
- Sensorimotor and mixed stressors led to increased lane departures, indicating riskier driving.
- Cognitive and emotional stressors paradoxically reduced lane departures, suggesting effective coping.
- Sensorimotor distractions disrupted this coping mechanism.
Conclusions:
- Cognitive and emotional stressors may enhance driver safety through compensatory mechanisms.
- Sensorimotor distractions can override these protective effects.
- The observed coping mechanism operates on a timescale longer than neurophysiological latency, as evidenced by stable crash rates during startling events under mixed stressors.
Related Concept Videos
01:20Psychological Responses to Stress
845
Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
845
01:23Types of Stressors
821
A stressor is any event, condition, or stimulus that triggers stress and causes a physical or psychological response in the body. Stressors can be categorized into three main types: catastrophes; significant life changes; and daily hassles, including social stress. Each can be detrimental to physical and mental well-being.
Catastrophes
Catastrophes refer to large-scale, unpredictable events that create overwhelming stress and a sense of threat. Examples include natural disasters like...
Catastrophes
Catastrophes refer to large-scale, unpredictable events that create overwhelming stress and a sense of threat. Examples include natural disasters like...
821
01:23Components of Stress
623
Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and...
Interestingly, the hidden cube faces also experience these stresses, equal and...
623
01:24Physiological Foundation of Stress
933
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Role of the Sympathetic Nervous System
Adrenaline triggers the...
933
01:20Lazarus's Cognitive Appraisal Theory
2.6K
Cognitive psychologist Richard Lazarus proposed the cognitive-mediational theory of emotions, which emphasizes how individuals' assessments of stressors significantly affect their experience of stress. According to Lazarus, the stress response is determined by a two-step appraisal process: primary appraisal and secondary appraisal. These cognitive appraisals help individuals evaluate the potential impact of a stressor and determine the adequacy of their coping resources.
Primary Appraisal:...
Primary Appraisal:...
2.6K
01:29The Influence of Cognition on Affect
272
Cognition plays a pivotal role in shaping emotional experiences, as demonstrated by Schachter and Singer’s two-factor theory of emotion. According to this model, emotion arises from a combination of physiological arousal and cognitive interpretation. The body’s physiological response to stimuli is ambiguous and only gains emotional significance through cognitive labeling. For instance, an increased heart rate and adrenaline surge while standing near an attractive person may be...
272