. Carnegie Institution of Washington publication. 50 40 to 20 20 20 20 5 GO 40 5 5 40 (iO 00 00 00 5 60 40 20 FIG. 11.—Initial and final accuracy with the bow in 19 subjects computed from first and last 40 shots. The ordinates are inches from the bulls-eye; the abscissae, the different subjects arranged in the order of their initial skill. The groups of which they are members are given below. The straight lines show the aver- age amount of improvement for any given initial accuracy. 20 10 'r. FIG. 12.—Initial and final accuracy of 9 subjects with the rifle, arranged as figure 11, except that t
. Carnegie Institution of Washington publication. 50 40 to 20 20 20 20 5 GO 40 5 5 40 (iO 00 00 00 5 60 40 20 FIG. 11.—Initial and final accuracy with the bow in 19 subjects computed from first and last 40 shots. The ordinates are inches from the bulls-eye; the abscissae, the different subjects arranged in the order of their initial skill. The groups of which they are members are given below. The straight lines show the aver- age amount of improvement for any given initial accuracy. 20 10 'r. FIG. 12.—Initial and final accuracy of 9 subjects with the rifle, arranged as figure 11, except that the ordinates represent centimeters. A COMPARISON OF UNLIKE GROUPS OF INDIVIDUALS UNDER THE SAME CONDITIONS OF PRACTICE. The first experiment was conducted with 8 subjects, each shooting 12 arrows daily under the same conditions. Four of the subjects (Group A) were inves- tigators working in the laboratory, 4 (Group B) were skilled laborers. The men of the first group were all trained in habits of delicate manipulation, such as those required by microscopic technique, and to a much less extent in acts of skill demanding coordination of widely dispersed groups of large muscles. The second group included a good marine engineer, another of less thorough training, a carpenter (acting as cook), and a first-class pilot who had served apprenticeship as a common sailor. TABLE 34. Group A. Group B. 1 to 40 shots. inches. inches. 341 360 shots . Absolute improvement . The distinction between the groups was made primarily upon professional status, and it is not certain that they differed materially in the number and variety of habits of manipulation at their command. Certainly Group A pos- sessed a much greater range and complexity of implicit habits than Group B, while the reverse was probably true of habits of the type involved in Please note that these images are extracted from scanned page images that may have been digitally enhanced for read
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