?? ???? ????? ?? ??? ?? ???? ??? ???? ????? ?????? ?? ??????? ?? ???? ?????? ??? ???? ?? ???? ????? ?? ?????? ???? ???????? ???? ?????? ????? ?? ?? ?? ?????? ?? ??? ???? ?? ??? ??, ?? ?????????? ?? ???? ???.The motivational program is effective mainly by a reward–punishment system. When a particular behavior is followed by favorable penalties, th