Vision and Ball Catching

If I am not mistaken last time I did mentioned about my Motor Learning subject field work (done in September and it's one of our coursework).
So, it's all about our vision and catching the ball.

I'll post up here some of the photos and videos taken when we were conducting the test.
It looks easy but sometimes certain people might have some problem of doing it.

Maybe I put up some brief information of the test before putting up all those photos and videos stuff.

Purpose :
To demonstrate the role of vision in catching ball. Compare catching a tossed ball while vision of the hands and fingers is available and not available.

Equipment:
--> Three to five tennis balls
--> Opaque screen to shield the participant's vision of his or her hands

Procedure:
--> Each participant will attempt to catch 14 tosses in each of the two vision conditions.
--> The participant will kneel and face the throwing partner.
--> For non-available vision, he or she will place the chin on the screen.
--> Place the preferred arm and hand under the screen to catch the thrown balls.

Score:
--> Number of successful catches and type of error will be recorded.
--> Two types of error (Grasp Error and Position Error)
--> Grasp Error :
a) ball hits palm of hand
b) ball hits palm side of fingers
c) ball hits back side of fingers (hand closed too soon)
--> Position Error :
a) ball does not hit palm of hand
b) ball hits finger tips