These findings are in line with robust integration where, when the difference between two cues is large, the discrepant cue (here gravity) is ignored. Surprisingly, VRI-vulnerable individuals weighted visual cues less and gravity cues more compared to VRI-resistant individuals. We then assessed the relative weightings of visual and non-visual cues in VRI-vulnerable and VRI-resistant individuals using the Oriented Character Recognition Test. Confirming our previous findings, the VRI-vulnerable group showed enhanced self-motion perception. Here, we determined if there was a relationship between VRI vulnerability and sensory weighting. We previously showed that when experiencing a VRI, visually induced self-motion is enhanced.
Some participants felt they were standing upright even when lying, indicating a visual reorientation illusion (VRI). Here, we created a visual-vestibular conflict by simulating a body-upright virtual world while participants were either standing (no conflict), supine or prone (conflict) and assessed the perception of “forward” distance travelled induced by visual motion. Normally, these cues are redundant however in some situations they can conflict.
Perceiving our orientation and motion requires sensory information provided by vision, our body and acceleration.
