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.

2、g.,depressionismeasuredinthesamegroupofpeopleatmultiplepointsintime)orcondition(e.g.,eachsubjectreceiveseverycondition).InSPSS,wewillusetheGeneralLinearModeltocalculaterepeatedmeasuresANOVAs.UsingGLMRepeatedMeasurestoCalculateRepeatedMeasuresANOVAsLet’sbeginwithanexamplefromtheexercises

3、inChapter18intheFundamentalsbook.Inthisexample,thedurationofmigraineheadacheswasrecordedamongthesamegroupofindividualsover5weeks.Thefirst2weekswerepartofabaselineperiodandthefinal3weekswerepartofaninterventionperiodinwhichsubjectsweretrainedtoapplyrelaxationtechniques.Inthiscase,theinde

4、pendentvariableistimeandthedependentvariableisheadacheduration.Openmigraines.sav.SelectAnalyze/GeneralLinearModel/RepeatedMeasures.ThedefaultforWithin-SubjectFactorNameisFactor1.Let’schangeittoTimebytypinginthebox.Specify5forNumberofLevelssincethereare5weeksandthenclickAdd.Next,click

5、Define.Asyoucansee,thereare5spotsunderWithin-SubjectVariables.Weneedtoindicatethateachweekisavariable,andwewanttolistthemintherightorder.Youcaneitherselectthemoneatatimeandarrowthemintothevariablelist,oryoucanselectthemallbyholdingdownthecontrolbuttonwhileyouselecteachone,andarrowthemi

6、natonce.Thisisasimpledesign,sotherearenoBetween-SubjectFactorsorCovariates.ClickPlots.SelecttimeastheHorizontalAxisorYAxis.ThenclickAdd,andContinue.Thiswillplotthemeandurationofheadachesforeachweekforus.Inthemaindialogbox,clickOptions.UnderDisplay,selectDescriptiveStatistics,Estimates

7、ofEffectSize,andObservedPower.ThenclickContinue.Andfinally,Ok.Theoutputfollows.DescriptiveStatisticsMeanStd.DeviationNheadache20.787.179durationweek1headache20.0010.229durationweek2headache9.003.129durationweek3headache5.783.429durationweek4headache6.784.129durationweek5Profile