306 CARNEGIE INSTITUTION OF WASHINGTON. 



(12) A pursuitmeter. W. R. Miles. Journ. Exp. Psychol., vol. 4, p. 77 (1921). 



This paper describes a new apparatus for measuring the adequacy of eye- 

 hand coordination which is probably one of the most important forms of 

 human behavior to measure in connection with nutritional factors, fatigue, 

 industrial conditions, and the hke. The subject under test observes a watt- 

 meter with zero center scale, and by the manipulation of a rheostat tries to 

 maintain continually a balance between two opposing electrical circuits. 

 The task is fairly uniform in nature, but so varied as to the direction, amph- 

 tude, rapidity of fluctuations, and rate of change in the current strength of one 

 circuit as to require constant attention from the reactor. The "disturber 

 mechanism" can be regulated to provide tasks of varying difficulty. The 

 errors of compensation are integrated in two meters, from which the score 

 may be directly read at the end of a test. Obviously the score combines both 

 quickness and accuracy, and the smaller the meter-reading the better the per- 

 formance. Test results with children and adults may be directly compared. 

 The use of the apparatus is illustrated by some data on the influence of small 

 amounts of alcohol. 



(13) A pursuitmeter. W. R. Miles. Psychol. Bull., vol. 18, p. 102 (1920). 



An abstract of the above-mentioned paper, published in the Proceedings of 

 the American Psychological Association. 



