Speeding up (and down) expectations: Investigating the influence of experimental context on speed perception
Mon-A6-Talk II-01
Presented by: Simon Merz
Motion perception is prone to systematic biases. For example, when asked to localize the onset or offset of a dynamic, moving target, perceptual shifts in, as well as against motion direction can be systematically observed, the so called Fröhlich effect, Onset repulsion effect, Representational Momentum effect, and Offset repulsion effect. Following new theoretical developments, one crucial underlying factor for these localization biases should be expectations regarding stimulus speed. In order to test this prediction, perceptually identical target motion trials are presented and compared across different experimental context. In these experimental contexts, different speed characteristics are realized, eliciting different speed expectations. The data indicate an effect of experimental context on the localization of dynamic stimuli, and implications for future theoretical developments and current theoretical formulations are discussed.
Keywords: motion perception, speed expectations, localization, Fröhlich effect, Representational Momentum