鉚題參數(shù)漂移對等值的影響及其消除方法研究.pdf

1、江西師范大學碩士學位論文鉚題參數(shù)漂移對等值的影響及其消除方法研究姓名：劉鐵川申請學位級別：碩士專業(yè)：基礎心理學指導教師：戴海琦20090501AbstractInlargescaleexamination，usuallytheabilityparameterofpopulationparticipatingindifferenttestformswillbeequatedforcomparingtheirmeasurmentresult

2、sonthesamescaleEmbeddinganchorsintestisfrequentlyusedinequating，whichrequiresnotonlytheanchors’representationincontentbutalsoequivalentfunctionindifferenttestforms缸aresultofaffectingbycertainfactorsunrelatedtothemeasurem

3、entobjectiveitemparameterwillchangeindifferentadministrationGoldstein(1983)calledthisphenomenonitemparameterdrift(IPD)Inessence，bothItemParameterDriftandDifferentialItemFunctioning(DIF)areconcerningtheissueofmeasurementi

4、nvarianceComparedwiththeresearchonDIFtherearefewresearchonItemParameterDriftandmostofresearchhasbeenmostlyconcernedaboutthedeclineinthedifficultyparameterAtpresent，thereisnesearchinvolvedinhowtheequatingareinfluecedbybot

5、hdifficultyanddiscriminatingparameterdriftatthesametimeInthefirstresearch，comparisionamongmean／sigmamethod(M／S)，thecharacteristicscurve(TCC)andconcurrentcalibration(Cc)aremadebybysimulatingdata，undertwokindofequatingdeis

6、gn，fourkindofproportionofdriftinganchors，andeightkindofdriftmodeTheresearchfoundthat：(1)Wimthenumberofdriftinganchorsincreasing，theequaingbiasofthreemethodsuuallyshowsanupwardtrendThesensitivityofthreemethodsaredifferent

7、，andaffectedbYthediscrepanciesintheabilityoftwopopulations(2)InaUkindofdriftmode，thepositivediscriminatingparameterdrift(a)leadtothesmallestequatingbias111edriftmodesthatthedriftdirectionofdifficultyparameteranddiscrimin

8、atingparameteraredifferent(ab，ab)，leadtOgreaterequatingbiasthanthemodesthatthedriftdirectionofdifficultyparameteranddiscriminatingparameterarethesame(ab，ab)(3)Threeequatingmethods’performanceareaffectedbythedriftmodeTher

9、eisnoamethodtOhaveabsoluteadvantageHoweverinmostconditionsthedeletionofdriftinganchorswillreduceeachmethod’Sequatingbias(4)Intheconditionofabsenceofdriftinganchors，theequatingbiasofTCCislessthanM／Sinequivalentgroupdesign