_Actual instances prove that great increase of
work and results can be secured by outside stimulus
and by conscious effort_.

If there is one place where the limit of
exertion can be counted upon, it is in an inter-
collegiate athletic contest. While taking part
in football games, I frequently observed that
my team would be able to push the opposing
team halfway across the field. Then the
tables would be turned and my team would
give ground. At one moment one team would
seem to possess much superior physical
strength to the other; the next moment the
equilibrium would be changed apparently
without cause. Often, however, the weaker
team would rally in response to the captain's
coaching. On the field a player frequently
finds himself unable to exert himself. His
greatest effort is necessary to force himself to
work. In such a mental condition a vigorous
and enthusiastic appeal from the coach may

supply the needed stimulus and stir him to
sudden display of all his strength.

I recently conducted a series of experiments
on college athletes to determine
whether coaching could actually increase a