. Carnegie Institution of Washington publication. PSYCHOLOGICAL PROGRAM AND TECHNIQUE. 185 The subject very easily understood his task. He had to be especially warned, however, to hold his head still by keeping it pressed firmly against the rest and biting on the soft wooden peg with his teeth. He was repeatedly told that he must make his eye do all the moving and that he should see one mark clearly before looking for the other. The subject was instructed also to refrain from winking at the time of moving. Fig. 50.—Ground plan of the apparatus and arrangement for photographing eye movements. S
. Carnegie Institution of Washington publication. PSYCHOLOGICAL PROGRAM AND TECHNIQUE. 185 The subject very easily understood his task. He had to be especially warned, however, to hold his head still by keeping it pressed firmly against the rest and biting on the soft wooden peg with his teeth. He was repeatedly told that he must make his eye do all the moving and that he should see one mark clearly before looking for the other. The subject was instructed also to refrain from winking at the time of moving. Fig. 50.—Ground plan of the apparatus and arrangement for photographing eye movements. S, black screen surrounding the subject's field of view; R and L, right and left fixation marks sepa- rated by 40°; H, hood of camera; Z, lens in front of subject's eye, E; M^ and M^, mirrors for reflecting beam of light indicated by arrows; 2, frame carrying shield, ^, drops down and exposes eye to light as signal for movements to begin; C, cords for operating eye-reaction, stimulus device. The camera, located at the other end of the hood H, is not indicated in the diagram. the eye.^ The black screen which enclosed the subject's field of view (5, figure 50; B, figure 35) was of particular service in eliminating all distracting objects, so that it was unnecessary to warn the subject to refrain from looking at other objects than the correct fixation-points. Two series of movements were recorded on each photographic plate. The camera was moved slightly to one side at the beginning of the sec- 'Miles, Carnegie Inst. Wash. Pub. No. 266, 1918, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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