ProfessorWebsite: Email: kyuan@nd.eduhttp://psychology.nd.edu/faculty/faculty-by-alpha/ke-hai-yuan/ Expertise and Interest Areas: Correlation AnalysisFactor AnalysisGeneral multilevel (mixed, hierarchical linear) modelsGeneralized multilevel (mixed, hierarchical linear) modelsItem Response Theory ModelingMeasurementMeasurement InvarianceMediation AnalysisMissing DataMixture ModelingMultivariate AnalysisNonnormal DataPower AnalysisReliabilityStatistical InferenceStructural Equation ModelingTest Theory