重复测量spss方差分析进行比较均值(英文)

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1、10.ComparingMeansUsingRepeatedMeasuresANOVAObjectivesCalculaterepeatedmeasuresANOVAsCalculateeffectsizeConductmultiplecomparisonsGraphicallyillustratemeandifferencesRepeatedmeasuresANOVAsareusedtoexaminemeandifferencesinrelatedvariables.Typicallytheindependentvariableiseithertime(e.g.,depressi

2、onismeasuredinthesamegroupofpeopleatmultiplepointsintime)orcondition(e.g.,eachsubjectreceiveseverycondition).InSPSS,wewillusetheGeneralLinearModeltocalculaterepeatedmeasuresANOVAs.UsingGLMRepeatedMeasurestoCalculateRepeatedMeasuresANOVAsLet’sbeginwithanexamplefromtheexercisesinChapter18intheFundam

3、entalsbook.Inthisexample,thedurationofmigraineheadacheswasrecordedamongthesamegroupofindividualsover5weeks.Thefirst2weekswerepartofabaselineperiodandthefinal3weekswerepartofaninterventionperiodinwhichsubjectsweretrainedtoapplyrelaxationtechniques.Inthiscase,theindependentvariableistimeandthedepend

4、entvariableisheadacheduration.Openmigraines.sav.SelectAnalyze/GeneralLinearModel/RepeatedMeasures.ThedefaultforWithin-SubjectFactorNameisFactor1.Let’schangeittoTimebytypinginthebox.Specify5forNumberofLevelssincethereare5weeksandthenclickAdd.Next,clickDefine.Asyoucansee,thereare5spotsunderWithi

5、n-SubjectVariables.Weneedtoindicatethateachweekisavariable,andwewanttolistthemintherightorder.Youcaneitherselectthemoneatatimeandarrowthemintothevariablelist,oryoucanselectthemallbyholdingdownthecontrolbuttonwhileyouselecteachone,andarrowtheminatonce.Thisisasimpledesign,sotherearenoBetween-Subject

6、FactorsorCovariates.ClickPlots.SelecttimeastheHorizontalAxisorYAxis.ThenclickAdd,andContinue.Thiswillplotthemeandurationofheadachesforeachweekforus.Inthemaindialogbox,clickOptions.UnderDisplay,selectDescriptiveStatistics,EstimatesofEffectSize,andObservedPower.ThenclickContinue.Andfinally,Ok.Theo

7、utputfollows.DescriptiveStatisticsMeanStd.DeviationNheadache20.787.179durationweek1headache20.0010.229durationweek2headache9.003.129durationweek3headache5.783.429durationweek4headache6.784.129durationweek5Profile