The<unk> , also known as the<unk>  effect and the Walker effect, is the sensation of losing balance or dizziness reported by some people when stepping onto an<unk>  which is not working. It is said that there is a brief, odd sensation of imbalance, despite full awareness that the<unk>  is not going to move. It has been shown that this effect causes people to step inappropriately fast onto a moving platform that is no longer moving, even when this is obvious to the participant. Even though subjects are fully aware that the platform or<unk>  is not moving now, parts of their brains still act on previous experience gained when it was moving, and so misjudge how to step onto it. Thus, this effect demonstrates the separateness of the declarative and procedural functions of the brain. The<unk>  is the result of a locomotor after-effect which replicates the posture adopted when walking onto a moving platform to stabilise oneself This after-effect was studied by Adolfo Bronstein and Raymond Reynolds in an experiment published in 2003, then explored further through a series of additional experiments by Bronstein and associates. The phenomenon was originally discussed by Brian Simpson (1992) who named it the<unk>  effect" and regarded it as the perceptual consequence of a failed expectation. He thought it had something in common with the Duncker Effect. He also considered the related sensation experienced on alighting from a stationary<unk> .
Broken escalator phenomenon
Dawn phenomenon
Inverted binocular phenomenon
Tullio phenomenon
Endaural phenomena
Ashman phenomenon
Intrinsicoid deflection
Marcus Gunn phenomenon