@article{KruegelRothkegelEngbert2020, author = {Kr{\"u}gel, Andr{\´e} and Rothkegel, Lars and Engbert, Ralf}, title = {No exception from Bayes' rule}, series = {Journal of vision}, volume = {20}, journal = {Journal of vision}, number = {7}, publisher = {ARVO}, address = {Rockville}, issn = {1534-7362}, doi = {10.1167/jov.20.7.15}, pages = {14}, year = {2020}, abstract = {In an influential theoretical model, human sensorimotor control is achieved by a Bayesian decision process, which combines noisy sensory information and learned prior knowledge. A ubiquitous signature of prior knowledge and Bayesian integration in human perception and motor behavior is the frequently observed bias toward an average stimulus magnitude (i.e., a central-tendency bias, range effect, regression-to-the-mean effect). However, in the domain of eye movements, there is a recent controversy about the fundamental existence of a range effect in the saccadic system. Here we argue that the problem of the existence of a range effect is linked to the availability of prior knowledge for saccade control. We present results from two prosaccade experiments that both employ an informative prior structure (i.e., a nonuniform Gaussian distribution of saccade target distances). Our results demonstrate the validity of Bayesian integration in saccade control, which generates a range effect in saccades. According to Bayesian integration principles, the saccadic range effect depends on the availability of prior knowledge and varies in size as a function of the reliability of the prior and the sensory likelihood.}, language = {en} }