Pedagogisch-psychometrische Studien. Zwei vorlaufige Mitteilungen [review-book]

J. A. B.
1894 American Journal of Psychology  
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more » ... out Early Journal Content at http://about.jstor.org/participate--jstor/individuals/early-journal--content. JSTOR is a digital library of academic journals, books, and primary source objects. JSTOR helps people discover, use, and build upon a wide range of content through a powerful research and teaching platform, and preserves this content for future generations. JSTOR is part of ITHAKA, a not--for--profit organization that also includes Ithaka S+R and Portico. For more information about JSTOR, please contact support@jstor.org. 468 468 PHYCEOLOGICAL LITERATURS. PHYCEOLOGICAL LITERATURS. referred to the original. He ne2rt de#cribes a me$hod of miYing color# svith the stroboscope, which, in principle, iB similar to that of the color top, and might occa#ionally prove u#eful. Ne2rt follow# an application of the strobo#cope to the demon#tration of #imultaneous contrast. Suppo#e, for #implicity, a #trobo#cope di#k svith four slits, two of which (lying in the same diameter) are cosrered with red gla##, the other two being left free. Oppo#ite the #trobo-#copic disk, on the #ame asi# i8 placed a white di#k carrying two #mall black circle#. When thi# combination of di#k# i# #et in rapid rotation, the ob#erver #ee# a white or light red field, in which four dots appear to lie, two red brown and two green, the latter colored by contrast. [Such an e2C:periment #eem#, like many of Hering'#, to #peak emphatically for the phy#iological theory of #imultaneous contra#t. ] A fourth experiment of a more p#ychological character is the following: A #erie# of #trobo#copic picture# inblack and white, repre#enting boy# playing leap-frog, was taken, and, after it had been viewed for a #hort time with the #trobo#cope, the picture# repre#ellting one boy in the air exactly over the other, were changed by covering the boy in the air with white paper, tho#e #howinz the initial and concluding #tage# of the leap remaining unchanged. The alteration, however made no difference whatever in the conviction of the ob#erver tiat he actually #aw one boy in the air above the other. Indeed, the #ugge#tion involved in the mere beginning of the spring wa# #ufficient to cau#e the #eeing of the whole of it. A very inviting mean# i# thu# oSered a# the author points outfor the study of #ugge#ted illu#ion and hallucination. [Work along thi# line ha# apparently already been undertaken at Cornell; #ee page 414 of thi# JOURNAL.]
doi:10.2307/1411678 fatcat:2fn4jbatjvfghp6fndhnbwycfe