The Measurement of Attention

The Measurement of Attention

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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. 1914 edition. Excerpt: ...screen was built right into the wall separating the two rooms. A diagram of the apparatus is given in Fig. 6. Figure 6 Diagram of Apparatus for Reactions to Visual Stimuli. B = storage battery. B' = origin of the tachistoscope circuit, a circuit shunted off from a no volt direct current supplied by the university. K = key, non-essential, but convenient. Chron. = Hipp's chronoscope. R = slide resistance connected in parallel with the chronoscope. C and C' = contacts for double key. DK = double key. M = electro-magnet controlling tachistoscope shutters. S and S' = tachistoscope shutters. L = tungsten lamp. Stereop. = stereopticon. I = oblong image on ground glass plate. This image constituted the stimulus. WW = wall separating the experimenter from the subject. RK= subject's reaction key. The double key, DK, when raised to touch the contact C, closed the tachistoscope circuit, which passed through the electromagnet, M, holding the shutters SS' of the tachistoscope closed, and thereby cutting off the image of light at I. The slightest Table VIII The Effect of Variation in Intensity on the Effect of Variation in the Preparatory Interval, in the Case of Reactions to Light with the Regular Procedure. Subject Vs. N, for each interval of each series = 25. Total No. of reactions = 3700. downward movement of the key, DK, broke the tachistoscope circuit, and made the chronoscope circuit through the contact C', thus causing the shutters to fly open and the image to appear at I at the same moment that the chronoscope circuit was made. The time between the break at C and the make at C', however, was long enough to be measurable, and was found to be about 2 a, already mentioned as a constant error. With each of the four intensities reactions were taken...show more

Product details

  • Paperback | 54 pages
  • 189 x 246 x 3mm | 113g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236847415
  • 9781236847416