Is interpolation cognitively encapsulated? Measuring the effects of belief on Kanizsa shape discrimination and illusory contour formation

► Beliefs about contour connectedness did not alter illusory contour formation. ► Relatable configurations (Kanizsa shapes) were easier to distinguish when regarded as unitary objects. ► Non-relatable configurations were not easier to distinguish when regarded as unitary. ► Illusory contour formation is automatic and dissociable from Kanizsa shape discrimination.