HIGHLIGHTS
SUMMARY
Approximate number sense, magnitude discrimination, psychophysics, limits, guessing ratio of the compared groups (Feigenson et_al, 2004). Individuals differ in how precise their numerical estimates tend to be (Halberda et_al, 2008; Halberda et_al, 2012), and this has been accounted for by Weber`s law - a relationship between the ratio of the values to be discriminated and performance first described by Fechner in the earliest years of experimental psychology (Fechner, 1966/1860). Instead, these models predict smoothly decreasing performance as a function of the ratio of the comparison, with no drop to "chance performance" even on . . .
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