Measuring dynamics of the subjective vertical and tilt using a joystick

Measuring dynamics of the subjective vertical and tilt using a joystick

Correia Grácio, B.J.
Bos, J.E.

2012

Humans are able to estimate the vertical direction of an Earth fixed reference frame, which estimate is known as the subjective vertical (SV). To identify the SV, a distinction must be made between accelerations due to self-motion and gravity. Previous studies on this topic measured the SV using a variety of methods possibly affecting the outcome differently. In this study subjects were sinusoidally moved around their naso-occipital axis and their SV was dynamically measured using a joystick. In half the experimental conditions, the joystick was moved with the motion and was kept vertical on other experimental conditions, thus moving against self-motion. Although physically indicating the same angle, the average perceived angle was larger when moving the joystick with the motion than against. The difference can be explained by assuming an idiotropic vector being at issue when measuring the subjective vertical, and not when measuring subjective tilt.

We hebben gevonden dat de subjectieve verticaal wat anders is dan een kantelsensatie waarvan het dynamische gedrag beter gemeten kan worden met ene joystick dan met een nieuwe ontwikkelde audio-methode

Human
PCS - Perceptual and Cognitive Systems
BSS - Behavioural and Societal Sciences
Space
Aviation
Information Society
Motion perception
Spatial orientation
Subjective vertical
Subjective tilt
Joystick
Phase measurement

http://resolver.tudelft.nl/uuid:bb2719b3-61eb-4b1e-9b6c-77f8883c8b6f

https://doi.org/10.3233/ves-2012-0454

465793

Journal of Vestibular Research, 22 (4), 181-189

article