Perception of an Illusory Triangle with Masked Inducing Figure

Subjects viewed the Kanizsa triangle under conditions of visual masking. Depending on the type of mask employed, the triangle could be perceived when the inducing discs were not phenomenally present, or the discs could be seen with the triangle not present. These findings suggest that no single set of mechanisms, physiological or cognitive, will suffice to explain perception of the illusory triangle.