. Homing and related activities of birds . tring and the delayedtensing of the flexors then draws it a still greater distance in the oppositedirection. This movement must be almost wholly overcome before accurateshooting is possible. Equally accurate and difficult movements of the loosinghand must be acquired. An average variation of 2° of arc in the relative posi-tion of the hands results in an average of 25 inches from the center of thebulls-eye. Some of the championship records given l)elow require an averagevariation of less than 30 of arc in the aligimient of the arrows. The record of a s
. Homing and related activities of birds . tring and the delayedtensing of the flexors then draws it a still greater distance in the oppositedirection. This movement must be almost wholly overcome before accurateshooting is possible. Equally accurate and difficult movements of the loosinghand must be acquired. An average variation of 2° of arc in the relative posi-tion of the hands results in an average of 25 inches from the center of thebulls-eye. Some of the championship records given l)elow require an averagevariation of less than 30 of arc in the aligimient of the arrows. The record of a subject whose practice extended to more than 1,300 shotsis given in figure 17. This is the subject mentioned on page 122 as havinghad opportunity for practice of implicit habits before the beginning of theexperiment. This accounts for the high initial skill and for the resultingflatness of the first half of the learning curve. With the exception of the highinitial accuracy the curve seems to be typical for this amount of practice. LASHLEY.
Size: 1510px × 1655px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjectvis
