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[1]
[2]
?????? ?? ?'?? ?? ????? ?? ???? ??? ??????? ???, ??????? ???? ?????? ??????? ??? ????
[3]
??? ????? ?????? ?????? ?? ?????? ??????? ??????? ???? ??? ?? ???? ????? ??????? ??? ??? ??? ??????? ???????? ??????? ????? ???? ??? ???????? ????? ???-??????? ???? ????? ???? ?????? ?? ???? ??????? ??????? ?? ????? ?????, ????????? ????, ????? ???? ????? ????????????? '???????? ????' ?? '??? ??????? ????' ??? ?????? ???? ??????? ??? ????
[4]
??????????
? ????? - ?????? ??????? ???? ??? ????????? ????????? ???????? ??? ???? ?????
??????? ???????
? ????????????? ????????? ????? ????? ?-??????? ???????? ?????
??????? ????? ???? ???????? ??? ????? ?????? ???? ?????? ???? ?????'?? ???? ?????? ??????? ?????? ??? ?????? ??????? ??????? ?????? ???? ???? ???? ???-?????? ?????? ??????????? ????? ????? ???-????? ???? ???? ??? ??? ???-??????? ?????? ?????? ????? ???? ?? ???? ?????
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?? ????? , ?? ????? ???? ??? ????-?????? ????? ? ????? ????? ??????????? ??? ?? ??????????? ????????? ???????? ??????? ?????? ? ???????? ??? ????? ??????
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??? ????
???? ????? ?? ???? ????? ?????? ???? ???? ????????????? ???-????????? ???? ? ??? ????? ??????? ??????? ???? ????
[5]
??????
????? ???????
????? ??????? ???????????? ????? ??? ???? ?????? ???????
[6]
?????????
????? ?????
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?????? ??? ???? ??????? ??? ????-? ?????? ?????? ?????? ????? ???? ?????
??????? ???????????????
? ???? ??????? ????? ?????? ??% ??? ????? ???
????????????
??? ???? ?????? ??%?
[7]
????? ?? ????? ???????????
[8]
?? ????? ??? ??? ????? ????? ???? ??? ?? ??????????, ??? ?????? ???? ??? ????? ?? ???? ???? ?????? ?? ???????? ??? ??? ???????? ??????? ?????
[9]
?????? ??????? ??????? ???? ?????? ?????? ???? ?????? ????, ????????? ?????? ?????? ???? ????? ????? ?????? ???????? ????? ?? ?????? ?????????? ??? ??????? ???? ????? ??? ??????? ???? ???? ?????
- ????? ????
(Biological/Hereditary Factors): ????? ?????? ???????? ????? ????? ????????? ?????? ??????? ???? ???? ????? ?????? ????? ????? ???? ?????? ??????? ????? ????????? ???? ??????? ??? ????
- ???????????? ????
(Psychological Factors):
[10]
????? ?????? ??? ?????? ???????? ?????? ??? ??????? ????? ??????? ???? ????? ????????? ??????? ?????? ??????? ??????? ??? ?????? ???? ???? ????, ??? ?'??? ????, ?????? ?????????? ???? ????? ??????? ???? ??? ????? ?????? ?????? ???????? ????? ???????? ??? ???-?????? ?????????
- ??????? ????
(Environmental Factors):
[11]
????? ????? ??? ?????? ????????? ?????? ???????? ??????? ?????? ??????? ????? ????? ?????? ???? ??????? ??? ????? ??? ????? ???? ??? ??? ??????? ??????? ????? ??? ?????? ??????? ????