DEVELOPMENTAL TRENDS IN THE ADHERENCE OF PERCEPTION TO WEBER’S LAW Academic Article uri icon

abstract

  • Weber's law, a basic psychophysical principle by which sensitivity to changes along a given physical dimension decreases when stimulus intensity increases, characterizes human adults' perception for virtually all sensory dimensions. Nevertheless, the developmental trajectory of its validity in perception has not yet been tested. Here we investigated how early in childhood perception becomes adherent to Weber's law (ie minimum detectable increment in stimulus magnitude increases proportionally with stimulus magnitude). Children aged 5-10 and adults were asked to perceptually estimate the size of discs varying in radius. The just noticeable difference (JND) for a given size was determined in the method of adjustment by the variance of the estimations. JND increased with object size in accord with Weber's law at all ages tested. However, while for adults JND increased linearly with …

publication date

  • January 1, 2011