To say that... behaviors have different 'meanings' is only another way of saying that they are controlled by different variables.
B. F. SkinnerSomething doing every minute' may be a gesture of despair-or the height of a battle against boredom.
B. F. SkinnerA failure is not always a mistake, it may simply be the best one can do under the circumstances. The real mistake is to stop trying.
B. F. Skinner