In an experiment or survey, relative frequency of an event is the number of times the event occurs divided by the total number of trials. For example, if you observed \(100\) passing cars and found ...

The human perceptual system adapts to the environmental statistics from time to time (Helson, 1947; Gilchrist et al., 1999; Dean et al., 2005; Chopin and Mamassian, 2012; Gepshtein et al., 2013). For ...