A device for evaluating spot bowling ability.

Abstract The purpose of this study was to determine the degree of consistency in release point and point of aim accuracy evidenced by bowlers over several trials and over two days, the degree of objectivity of observations of this performance, and the validity of the observations. Subjects for the study were college women enrolled in bowling classes who had been taught to spot bowl using the Brunswick Range Finder. Subjects were given the task of delivering the ball at all 10 pins using spot bowling procedures, and five trials were recorded on each of two days. The actual position of the ball at release and with respect to point of aim was recorded as well as observations of these two positions by two independent observers. The results indicated that subjects were consistent in point of release but less consistent in point of aim. Observer agreement was high, indicating that only one observer is needed to record the position of the ball with respect to point of aim and point of release. The observation re...