Shadows without penumbra

Fabio Metelli

pp. 200-209

in: Suitbert Ertel, Lilly Kemmler, Michael Stadler (eds), Gestalttheorie in der Modernen Psychologie, Heidelberg, Steinkopff, 1975

Abstract

It has bean found in studying the chromatic conditions for the perception of transparency, that some figures, instead of generating the impression of a transparent layer through which part of the surface beyond could be seen, were described as having a dark shadow cast on them.¹)