6van Ulzen N R, Semin G R, Oudejans R D, et al. Affective stimulus properties influence size perception and the Ebbinghaus il lusion [J]. Psychological Research, 2008, 72(3): 304 - 310.
7Roberts B, Harris M G, Yates T A. The roles of inducer size and distance in the Ebbinghaus illusion (Titchener circles)[J]. Perception, 2005, 34(7): 847 - 856.
