Associate ProfessorWebsite: Email: ycheng4@nd.edu Department of Psychology, University of Notre Dame, Lab of Psychological and Educational Measurement, http://sites.nd.edu/peml/ Expertise and Interest Areas: Diagnostic Classification ModelingFactor AnalysisItem Response Theory ModelingMarkov Chain Monte Carlo MethodsMeasurementMeasurement InvarianceScale DevelopmentSurvey MethodsTest DesignTest TheoryValidity