Reliability of psychophysiological responses across multiple motion sickness stimulation tests

Area of Science:

• Neuroscience
• Human Physiology
• Motion Sickness Research

Background:

• High inter-subject variability in autonomic responses to motion sickness is known.
• Limited research exists on the intra-subject reproducibility of these autonomic responses.

Purpose of the Study:

• To assess the reliability of autonomic nervous system responses and symptom levels during motion sickness.
• To examine reproducibility across five testing occasions.
• To investigate the relationship between autonomic changes and symptom severity.

Main Methods:

• Evaluated autonomic responses (heart rate, blood volume pulse, respiration rate) and symptom levels.
• Analyzed data from the final minute of testing.
• Assessed changes in autonomic responses and symptoms throughout the test.
• Examined the correlation between symptom changes and autonomic response changes.

Main Results:

• Autonomic responses (heart rate, blood volume pulse, respiration rate) showed moderate stability in the final test minute.
• Changes in autonomic responses and symptoms over the test duration were less stable.
• A significant relationship was found between autonomic responses and symptom levels across the entire test.

Conclusions:

• Autonomic responses to motion sickness exhibit moderate test-retest reliability, particularly in the late stages of stimulation.
• While overall autonomic patterns are somewhat reproducible, dynamic changes during the test are less reliable.
• Autonomic nervous system activity and perceived motion sickness symptoms are interconnected throughout the testing period.