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Reproducibility of flutter-range vibrotactile detection and discrimination thresholds
Mark Mikkelsen1,2, Jason He1, Mark Tommerdahl3
1Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
Scientific Reports
|April 18, 2020
Summary
This study establishes the test-retest reliability of vibrotactile psychophysical measures in healthy adults. Vibrotactile detection and discrimination thresholds demonstrate good reliability, supporting their use in assessing tactile function.
Area of Science:
- Neuroscience
- Psychophysics
- Sensory Science
Background:
- Somatosensory processing is crucial for tactile function.
- Vibrotactile psychophysical experiments are used to study tactile perception.
- The test-retest reliability of vibrotactile thresholds was previously unestablished.
Purpose of the Study:
- To assess the reproducibility of vibrotactile detection and discrimination thresholds.
- To evaluate the reliability of various vibrotactile measures in healthy adults.
- To support the use of psychophysical methods in tactile function assessment.
Main Methods:
- Fifteen healthy adults participated in three repeated sessions.
- An eleven-task vibrotactile psychophysical battery was administered.
- Measures included reaction time, detection/discrimination thresholds, and temporal order judgment.
- Coefficients of variation and intraclass correlation coefficients (ICCs) were calculated.
Main Results:
- Reaction times showed the highest reproducibility (ICC: ~0.9).
- Detection thresholds exhibited good reliability (ICC: ~0.7).
- Frequency discrimination thresholds were the least reproducible (ICC: ~0.3).
- Task-related effects were found to be reproducible, consistent with prior studies.
Conclusions:
- Vibrotactile detection and discrimination thresholds are reliable measures.
- The findings validate the use of vibrotactile psychophysics for probing tactile function.
- This study provides crucial reliability data for clinical and research applications.
