Sources of information for catching balls

On catching fly balls.

The information for catching fly balls: judging and intercepting virtual balls in a CAVE.

Visually guided action implies the existence of information as well as a control law relating that information to movement. For ball catching, the Chapman Strategy--keeping constant the rate of change of the tangent of the elevation angle (d(tan(alpha))/dt)--leads a catcher to the right location at the right time to intercept a fly ball. Previous studies showed the ability to detect the informa...

Shedding some light on catching in the dark: perceptual mechanisms for catching fly balls.

To catch a lofted ball, a catcher must pick up information that guides locomotion to where the ball will land. The acceleration of tangent of the elevation angle of the ball (AT) has received empirical support as a possible source of this information. Little, however, has been said about how the information is detected. Do catchers fixate on a stationary point, or do they track the ball with th...

Fielder’s Choice: A Unified Theory of Catching Fly Balls

Sources of anxiety during information seeking process

Background and Aim: the current study aims to determine factors which may cause negative feeling such as fear, uncertainty and anxiety during information seeking process. Method: In this review paper, different library resources and databases were searched in the areas of library anxiety, Internet anxiety, computer anxiety, information seeking, information searching and information retrieval t...