title: Subjective rarefaction in illusory figures: the inadequacy of apparent lightness as an explanation.
abstract: Apparent rarefaction in subjective figures seems to violate the principle of size scaling. It has been claimed that this anomaly is due to a difference in illusory lightness which counteracts the expected effect of illusory depth. Qualitative evidence is presented that neither illusory lightness nor illusory depth have a relevant part in the phenomenon. An alternative account, in which contrast and size are shown to play major roles, is presented and discussed.
authors.affiliation: Dipartimento di Psicologia Generale, Università di Padova, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Bressan
mesh_terms: D003118:Color Perception; D003867:Depth Perception; D006801:Humans; D007088:Illusions; D009903:Optical Illusions; D010812:Physical Stimulation