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Psychometrics of inertial heading perception
Olivia Geno1, Kyle Critelli2, Cesar Arduino2
1Department of Neuroscience, University of Rochester, Rochester NY, USA.
Journal of Vestibular Research : Equilibrium & Orientation
|April 19, 2024
Summary
This study found that heading perception point of subjective equality (PSE) has moderate test-retest reliability, while heading discrimination thresholds show poor reliability across sessions. These findings offer clinical insights for assessing changes in vestibular self-motion perception.
Area of Science:
- Neuroscience
- Vestibular System Research
- Perception Science
Background:
- Inertial self-motion perception relies heavily on otolith cues.
- Vestibular perceptual thresholds, including inertial heading, are adaptable, opening avenues for clinical interventions in vestibular disorders.
Purpose of the Study:
- To investigate the psychometric properties, specifically test-retest reliability, of a passive inertial heading perceptual test.
- To assess the stability and reliability of perceptual estimates of inertial heading.
Main Methods:
- Forty-seven healthy subjects performed a passive inertial heading discrimination task across two visits.
- Point of subjective equality (PSE) and discrimination thresholds were measured.
- Test-retest reliability was analyzed using intraclass correlation coefficients (ICC) and paired t-tests.
Main Results:
- Within sessions, heading discrimination PSE showed good reliability (ICC = 0.80) and stability.
- Heading discrimination thresholds demonstrated moderate reliability (ICC = 0.67) and stability within sessions.
- Across sessions, PSE reliability was moderate (ICC = 0.59), but threshold reliability was poor (ICC = 0.03), with thresholds significantly decreasing at the second visit.
Conclusions:
- Heading perception exhibits moderate reliability for PSE, providing a clinical reference for evaluating changes in vestibular self-motion perception.
- The poor reliability of heading discrimination thresholds across sessions suggests caution when interpreting changes over time or after interventions.
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