???????????????????
???????????????????????????????????????????????????????? 1996 ??????????????????????? (PES)?????????????????????????????
?????1996??2011?PES???????????????????????????????????2005????PES??????????????????Cronbach's alpha??????????????????????????????????????????????????????
??????????????????????53.7%?????64.7%??????????????????48.1%???50.4%???????????????7?????????Cronbach's alpha?????0.895?0.863????????????????????????????????????????Pearson?????r=0.650?p<0.01???????????????????????????????????r=0.255-0.294?????????????????????????????β=0.152?SE=0.031?p<0.001?????????????????????β=-1.512?SE=0.052?p<0.001??
? 1? PES 2005 ???????????????????????????????n=132,932?1996 ???n=113,980?1999 ???n=73,370?2002 ???n=112,719?2005 ???n=42,239?2008 ???n=51,632?2011 ????????n=214,432?1996 ???n=191,987?1999 ???n=115,907?2002 ???n=172,809?2005 ???n=100,946?2008 ???n=98,988?2011 ???
??? 15???????????????????????????????????????????????????????
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