聚焦和非聚焦书面修正反馈对英语虚拟条件句习得的影响

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1、硕}学位论文AbstractThefirstresearchquestionconcernedinthefieldofwrittenCFis：shouldwecorrecttheerrors?In1996，TruscottclaimedthatwrittenCFisnotonlyineffectivebutpotentiallyharmful．ThisisachallengetotheadherentsofCFandthenhasbeenthefocusofthedebate(Ferris，1999；Bitchenereta1．，2005；Elliseta

2、1．，2008)．Althoughmorethanadecadehasnowpassed，thiscontroversyhasnotbeenresolvedandtherearewidelyconflictinganswerstothisissuesincetherearevariouslimitationsforthepreviousstudies．Anothermainissueishowwecorrecttheerrors．Thispresentstudywastoinvestigatewhetherfocusedandunfocusedwritte

3、ncorrectivefeedbackhelpnon-Englishmajorstoimproveaccuracyintheuseofsubjunctiveconditional．Theexperimentlasted9weeks，involving96subjects．Accordingtotheirpre-testscoresandthetypesoffeedback，thesubjectsweredividedintodirectfocused，indirectfocused，directunfocused，indirectunfocusedgrou

4、ps．Theresultsindicatedthatallthetreatmentgroupssignificantlyoutperformedthecontrolgroup．However,intheimmediatepost—test，therewasnosignificantdifferencebetweenfocusedandunfocusedgroups，butdirectfocusedgrouppreformedbetterthanindirectfocusedgroup，directunfocusedgroupbetterthanindire

5、ctunfocusedgroup；inthedelayedpost-test，focusedgroupsoutperformedtheunfocused，indirectfocusedgroupbetterthandirectfocusedgroup，indirectunfocusedgroupbetterthandirectunfocusedgroup．Moreover，subjects’proficiencyaffectedtheeffectivenessoffeedbackonimprovingaccuracyinsubjunctiveuse．Itt

6、urnedoutthatforhighproficiencystudents，unfocusedfeedbackwasmoreeffectivethanfocusedfeedback，indirectmoreeffectivethandirectintheshorttermandforthelongrun，itwasstillthesame；forlowproficiency,focusedfeedbackwasmoreeffectivethanunfocusedfeedback，directmoreeffectivethanindirectinthesh

7、orttermandforthelongrun，focusedfeedbackwasmoreeffectivethanunfocusedfeedback，andindirectfeedbackshowedmorepotentialityinimprovingaccuracyintargetstructure．ThispresentstudyrunscountertoTruscott’S(1996)claimthatcorrectivefeedbackisnotonlyineffectivebutharmful，thusithasprovidedfurthe

8、rpositiveevidenceinsupportoftheef