Studies from the Yale Psychological Laboratory Volume 4

Studies from the Yale Psychological Laboratory Volume 4

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ... of each other, for on this theory we may add the illusion of A to the illusion of B and take the sum of these as the expression of the illusion of either A or B in terms of the other. Thus The error involved by substituting the actual figures is 5% for the first equation and 7% for the second. Although these are extreme cases the error of the substitution is no greater than that found when the mean, C, was used asastandard. Therefore, within obvious limits, we are justified in choosing the standard of any convenient size in measurements like these. ust as no one now claims an exact mathematical conformity for Weber's law in any sense, we must construe the above formula liberally. There may be some more determinable factors that must be taken into it; we can never hope to determine and control all such factors. udgments as to the validity of the law have heretofore been made largely upon experiments that involved the illusion here discussed, or similar ones, and the variations caused by them have been counted as discrepancies in the law. The above data at least justify us in assuming this relation of Weber's law to illusions as a working hypothesis. It promises not only the same degree of comformity as the law has had on the old theory, but also an extension of it both in the degree of conformity and the range of its applicability. RESEARCHES ON VOLUNTARY EFFORT. _ BY E. W. SCRIPTURE. We may suppose that in primitive times quantities were measured according to mental scales; thus distances would be established by the eye or paced off by walking, weights would be judged by the effort required to lift them, etc. In most cases later civilization has, by the method of maximum agreement, ' established successively more

Product details

  • Paperback | 50 pages
  • 189 x 246 x 3mm | 109g
  • United States
  • English
  • black & white illustrations
  • 1236766938
  • 9781236766939