References
J. M. Charcot, Clinical Lectures on Diseases of the Nervous System, iii., 1889, Lect. xiii.; W. James, Principles of Psychology, 1890, i., chs. xiii., xv.; ii., chs. xviii., xix., xx.; C. H. H. Parry, The Evolution of the Art of Music, 1896; article on Optical Illusions, in Dictionary of Philosophy and Psychology, ii., 1902; W. Wundt, Lectures on Human and Animal Psychology, 1896, Lect. xi.; Outlines of Psychology, 1907, §§ 9, 10, 11; M. R. Fernald, The Diagnosis of Mental Imagery, 1912; E. B. Titchener, Experimental Psychology, I., i. and ii., 1901 (experiments on perception); Text-book of Psychology, 1910, 303 ff.