Gravity-Referenced Eye Level (GREL)

From EuroVR Knowledge Base

Description

By manipulating the orientation of a VE, visual information is provided about spatial location, which is different from information provided by non-visual stimuli. Nemire, Jacoby, and Ellis (1994) propose that the extent to which the visual information biases the participant’s estimate of spatial orientation can be used as a measure of simulation fidelity. Participants are asked to estimate their eye level when viewing a pitched VE through a HMD. The GREL measure is calculated based on actual eye level and estimated eye level.

Primary Reference or Source

• Nemire, K., Jacoby, R. H., & Ellis, S. R. (1994). Simulation fidelity of a virtual environment display. Human Factors, 36, 79-93.