THE MULLER-LYER-ILLUSION IN INTERPOLATED FIGURES

The Muller-Lyer patterns formed by separate dots have been used as sti muli in an experiment on visual perception to assess the influence of the number of dots composing the figures on the magnitude of the illus ion. As predicted by our model, based on the Image Function theory, an increase was noted in the magnitude of illusion when the number of do ts composing the arrowheads was increased. It follows from the model t hat filtering of the input image plays a central role in the formation of the illusion.