Abstract
This research examined the factors that influence the performance of target-pointing task in virtual reality, and proposed an extended model to incorporate the target depth into the original Fitts’ law, which improved the predictive ability of the model compared with previous methods. The research was carried out through two parts of experiments. The pre-experiment was a priori on the relationship between depth and size perception. The formal experiment mainly discussed the effect of size and depth perception of targets at different depths on the performance of ray-casting interaction when the target retinal image size were same. The experimental results supported the size-distance invariance hypothesis. It has been found that it takes less time to point to a target with a larger depth, that is, a larger size. Our findings confirmed the effect of size and depth perception on ray-casting interactions in virtual reality.
Published Version
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