Jastrow, Joseph, 1863-1944 · Boston ; New York : Houghton Mifflin · leaf 307
of thediagram except the four main bands. But if the whitepart of the diagram be conceived as the design againsta black background, then the design is no longer thesame, and with this change the illusion disappears, and 284 FACT AND FABLE IN PSYCHOLOGY the four bands seem parallel, as they really… … Fig. 5. — When this figure is viewed as a black pattern on a white back*ground, the four main vertical black bands seem far from parallel; whenit is viewed as a white pattern on a black background the pattern is differ^ent and the illusion disappears (or nearly so), and the four black bands aswell…
Parapsychology · Psychology · Spiritualism
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