[net.kids] More on reinforcement

rich55@hound.UUCP (R.GORE) (12/27/85)

Behavioral science does not say that "punishment is bad"; nor does
it say that reinforcing a behavior will always create a dependence between 
the behavior and a reward, although this can be done.

  Punishment (removing a positive stimulus, adding a negative stimulus)
shapes behavior just as well as reinforcement (adding a positive stimulus,
removing a negative one) when done CONSISTENTLY and following a 
SCHEDULE.
 
Children who are punished learn to stop the punished behavior whenever
they believed that the punisher could not be escaped.  The drawback of
punishment is that it will usually only shape behavior 
that the punisher is aware of, 
and also create escape behavior.  So a result of consistently 
taking toys away from children when they fight will be that they will
either stop fighting whenever you're around, or they will grab their 
toys and try to make a break for it.  (Or they may even generalize the
not-fighting behavior even when you're not around; that's what makes
kids more interesting than rats.)
But if you're only interested in stopping a behavior when you're around,
punishment is certainly effective.

Children who are rewarded for a "good" behavior every time they do it
do tend to get hooked on the reward, and the behavior extinguishes when
the reward is withdrawn (or soon thereafter).  To maintain the behavior
for long periods of time, you should gradually and randomly increase the
number of times you fail to reward the good behavior. 
Slot machines approach this in their payoffs of lever-pulling behavior.