Identifier: manualofmentalph00whip (find matches)
Title: Manual of mental and physical tests : in two parts : a book of directions compiled with special reference to the experimental study of children in the laboratory or classroom
Year: 1921 (1920s)
Authors: Whipple, Guy M. (Guy Montrose), 1876-1941
Subjects: Psychophysiology Psychological tests Intelligence Tests Child Psychology
Publisher: Baltimore : Warwick & York
Contributing Library: University of Connecticut Libraries
Digitizing Sponsor: University of Connecticut Libraries

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y Binet, Cattell, Dodge, Erdmann and Dodge,Goldscheider and Miiller, Becher, Wundt, Huey and Zeitler. A shortsummary of these issues was published by the author in the first editionof this work. It may be pointed out merely that the black pre- and post-exposure fields of the disc tachistoscope here prescribed afford the mostbrilliant possible exposures, with longest retinal effects, so that an ex-posure of 50 to 75 a will give a well cleared-up image (to employDodges term) and at the same time eliminate eye-movement. ^his instrument, devised by the author and employed by him in study-ing the effect of practise on the range of attention does not fulfill all ofthe requirements of the ideal tachistoscope, but it has the merit of beingrelatively inexpensive, simple in operation and construction, and ofanswering satisfactorily for comparative tests. It has also been designed»with a view for use both for these short and for much longer exposures(Test 25). TEST 24: RANGB OV VISUAL ATTENTION
Text Appearing After Image:
FIG. 57. DISC TACHISTOSCOPE. and figures, Size 8. Drawing ink and ruling pen. Head^rest,with suitable supports and claraps. (Fifty vibrations dry-con-tact fork (Fig 58.) Dry battery. Connecting wire.) Preliminaries.—Prepare a series of exposure cards by useof the gummed letters and figures. Paste tbe letters smoothlyand evenly, and center the series on each card. The test objects should iudude isolated letters, groups of letters, or lettersmixed with digits in nonsense arrangement, in numbers fromtwo to eight or ten per card. Prepare other cards with shortwords, short sentences, or columns of digits. Prepare stillothers with the aid of drawing ink, so as to present regular orirregular series of spots, lines, geometrical figures, surfaces, Suggestions for the construction of head-rests are given by Judd. 266 ATTENTION AND PERCEPTION etc., in varied fashion/ It is well to confine the objects, in sofar as possible, to an area 50 mm. wide and 35 mm. high. Ex-posure cards can also be for

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