m4 ew

11, Comparison of age rank with a final single score derived from the
four evaluations suggests that the manner of throwing a hard overhand
throw is a function of age. Correlations are +,91".022 for the entire
group; nm, 9dm, 027 for the girls! group; 4.97.01 for the boys’ groupe
D, Conclusions Interpreted in the Light of Allied Knowledge.

Features of change apparent in sequential throwing patterns demon=
strate a trend toward better mechanical means of projection and more advan=
tageous timing, which contribute opened speed and accuracy.

Growth of throwing behavior exhibits certain developmental character-
istics present in other forms of growth.

Development of the basic type pattern seems dependent upon development
of equilibratory powers; its development into an intricately timed activity
seems dependent — the proprioceptive mechanism,

Maturational factors are assumed as responsible for the basic type
patterns of throwing, Learning may be largely responsible for the skill
pattern individuating out of and upon the basic growth stage; it may be the

factor accountable for the differences in performance between Se@xXeS,