Bauhaus-Universität Weimar

Titel:
Experimental Psychology: A Manual of Laboratory Practice, Vol. II: Quantitative Experiments, part 2: Instructor's Manual
Person:
Titchener, Edward B.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit11940/443/
266 
The Metric Methods 
wooden cases, for $8.50. The weights were to be lifted in the palm of 
the hand. Fullerton and Cattell used round wooden boxes, about 6 cm. 
in diam. and 3 cm. high ; “the weight was lightly grasped on the side 
with the thumb and fingers” (Small Diffs.,118 f.). Frankl had “gleiche 
Blechbüchsen, entsprechend mit Schrotkügelchen angefüllt ” (Z., xxviii., 
1902, 2). This is, of course, the simplest type of weight-holder,—a shell, 
into which the weight is packed, and which forms with the weight a single 
solid block.1 Next in order comes the weight-holder with separate 
handle. liering’s2 O's used, for one series, a light wooden handle, to 
which was hung a scale-pan of cardboard ; the handle was taken between 
thumb and forefinger. Fechner’s weight-holder is of this type. So, too, 
is the box and ring employed by E. Claparède in his study of the rate of 
lift with weights of different volume (Arch, de psych, de la suisse romande, 
h, 1901, 74 ; ii., 1902, 24). A somewhat different principle is introduced 
with Weber's3 plan of laying the weight in a cloth, the corners of which 
are gathered up and held by O. Hering's O's, in another series, grasped 
the two ends of a towel which supported a wooden scale-pan. An ex¬ 
tension of this principle is found in Wreschner’s apparatus (Methodol. 
Beitr., 1898, 8), where the weight-holder hangs by a cord carried over 
pulleys from a wristlet attached to 0's forearm. Of the same type is the 
arrangement described by A. J. Kinnaman, A. J., xii., 1901, 242. 
Merkel (P. S., v\, 1889, 254 f.) and C. Jacobi (Arch. f. exp. Pathol, u. 
Pharmakol., xxxii., 1893, 49 ff.) replace the weight-holder by a form of 
active pressure balance.— 
The dimensions of the author’s holders are approximately 8.5 x8-5 x 15 
cm.4 The wooden handle is 10 cm. in length ; its diameter for men’s 
hands is 2.9, for women’s, 2.6 cm. The principal weights form the series 
1000, 900, 800, 700, 600, 500, 400 gr. (4 of each) ; the minor weights 
(4.6 cm. in diam.) the series 200 (4), 100 (4), 50 (4), 20 (8) gr. The 
weights and holders can be so cheaply made that it is worth while to 
have at least 3 sets (24 holders) in the laboratory. 
It is very important that the instructions given to O for these 
two exps. be clearly worded. E and 0 come to the exps. to- 
1 Cf. the weights used in the study of the size-weight illusion : F. B. Dresslar, 
A. J., vi., 1894, 343 ; J. A. Gilbert, Yale Stud., ii., 1894, 43; C. E. Seashore, Und., 
iii., 1895, 2 ; ibid., 1S96, iv., 62; Scripture, New Psych., 1897, 274; etc. Other 
refs, will be found in these papers : see also Claparède, first ref. in text below. 
With Yale Stud., iii., 18, cf Iowa Stud., ii., 1899, 36 ff. 
2 See above, p. lxxi. 3 See above, p. xvii. 
4 The wire frames are here made needlessly high (7.1 and 7.3 cm.). It would 
be better to lower the frames, and to increase correspondingly the length of the 
handle supports.
        

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