Quantitative Method in Educaiton
Favorite links: Go Home || Links || Quantitative Methods || Statistics || Mathematics || Statistics Education || Teaching || Working ||
People
- My Advisory Committee for Degrees
- Statistics Education
- Program Evaluation
Research Interests, Projects and Assistances
- Longitudinal Data Analysis :
- Fractional Polynomial Model (With Jeffrey Long) : "Using Fractional Polynomials to Model Nonlinear Trends in Longitudinal Data." the British Journal of Mathematical and Statistical Psychology
- Model Selection (Ph.D. Dissertation: June, 2010)
- Testing variance components (Preli Oral Exam: May, 2008)
- Programs : R, SAS, SPSS, and SPlus
- Variable Selection Criteria :
- Variable selection criterion based on bias and variance (with Chatterjee)
- Review on variable selection criteria (MS Proejct: June, 2010)
- Programs : R
- Item Response Theory :
- IRT with Bayesian estimation (with Dong Gi Seo)
- Dimensional structure in CAOS4 || DIF analyses in CAOS4 ||
- Programs : R, WinBUGS, BilogMG, andTESTFACT
- Bayesian (BMDA-Data) || Bayesian IRT ||
- Computerized Adaptive Test :
- Termination Criteria (with Namkeol Kim)
- Programs : PostSIM and BilogMG
- Quality Compensation & MCA II :
- Propensity Score (with Saahoon Hong and William Bart)
- MCAII (Minnesota Dept. of Education) || Mean Growth Curve Modeling for MCAII (Summer, 08 to Current) ||
- Programs: R, SAS, SPSS, and HLM
- Primary Researcher : Arthur Reynolds (Institute of Child Developments)
- Research title (or topic) : Chicago Longitudinal Study || Mean Growth Curve Models for Achievement Scores (Internal Report) ||
- Periods : Summer, 2007 ~ Spring, 2008
- Programs: SAS, R, SPSS
- Primary Investigator : Joan Garfield (Educational Psychology)
- Research title (or topic) : CATALST || Dimensional Structure || IRT DIF and DTF ||
- Periods : Summer, 2008 ~
- Programs : R, Bilog-MG, HLM, and TESTFACT
Presentations and Publications
- AERA Section 8 - Paper presentation (May, 2010) with Saahoon Hong and William Bart
- A Longitudinal Study of Performance Pay: Examining Special education Student Group Achievement
- JSM - Poster presentation (Aug., 2009)
- Exploration of dimensionality of the CAOS test
- Psychometric Society - Paper presentations accepted but not presented
(July, 2009)
- Evaluating CAOS 4 test: Dimensionality and Differential Item and Test Functioning
- Effects of Different Termination Criteria on classification Consistency in CAT (with Namkeol Kim)
- AERA Section H - Paper presentation (April, 2009) with Saahoon Hong and William Bart
- A Preliminary Longitudinal Study of Performance Pay for Teachers: Examining Elementary School Performance in Mathematics and Reading
- CEHD Research Day - Poster presentation (March, 2009) with Namkeol Kim
- Effects of Different Termination Criteria on Classification Consistency in CAT
- Psychological Society - Paper presentation (July 1, 2008) with Dong Gi Seo
- Efficiency of Bayesian Estimation with Gibbs Sampling in IRT models
- AERA Section H - Paper discussion (March 26, 2008) with Saahoon Hong
- The Effect of Quality Compensation for Teaching on Student
Performance in math and reading
- Maine/Quebec Number Theory Conference - Paper Presentation (Oct. 2000)
- Identities for Multiple Zeta Values
- Jeffrey D. Long and Jihoon Ryoo (2010), "Using Fractional Polynomials to Model Nonlinear Trends in Longitudinal Data", Brithish Journal of Mathematical and Statistical Psychology, 63(1), 177-203
- D. Bowman, D.M. Bradley, and Jihoon Ryoo (2003), "Some multi-set inclusions associated with shuffle convolutions and multiple zeta values", European Journal of Combinatorics, 24 (1), 121-127
- Ji Hoon Ryoo, "Model Selection with the Linear Mixed Model for longitudinal data", PhD Dissertation, Univ. of Minnesota, June 2010
- Ji Hoon Ryoo, "New Variable Selection Criteria", Master's Project, Univ. of Minnesota, June 2010
- Jihoon Ryoo, ¡°Identities for multiple zeta values using the shuffle operation¡±, Master¡¯s Thesis, Univ. of Maine, May 2001
Study Resources and their Information (Journals, Seminars, books etc.)
- Longitudinal Data Analysis - LMM : Course Note (by Dr. Long, Spring 07) - Final project (Fractional Polynomial MMs) || Linear Mixed Models for Longitudinal Data (Verbeke and Molenberghs) || Models for discrete longitudinal data (Verbeke, Molenberghs) ||Analysis of Longitudinal data (Diggle, Heagerty, Liang, and Zeger) || Applied longitudinal analysis (Fitzmaurice, Laird, Ware) || Mixed-Effects Models in S and S-PLUS (Pinheiro and Bates) ||
- Hierachical Linear Models - HLM : Course Package (by Dr. Harwell, Summer 07) - Final project (MCAII) || Hierarchical Linear Models (Raudenbush and Bryk) ||
- Latent Variables - SEM/FA : 2 Weeks presentation of Multivariate Analysis (with Dong Gi Seo, Summer 07) || Course Note (by Dr. Wall, Fall 07) || Principles and practices of SEM (Rex B. Kline) || Analyzing Multivariate Data (Lattin, Carroll, and Green) || Making sense of factor analysis (Pett, Lackey, and Sullivan) || Generalized Latent Variable Modeling (Skrondal and Rabe-Hesketh) ||
- Item Response Theory - IRT : 2 weeks presentation (by Dong Gi Seo, Summer 07) || Item Response Theory For Psychologists (Embretson and Reise ) || 6 weeks IRT Estimation seminar - Baker and Kim (with Dong Gi Seo, Summer 08) ||
- Power Analysis - Semester long study about Optimal Design || UCLA seminar resources (Introduction; Intermediate; Advanced) ||
- Bayesian - Bayesian Methods for Data Analysis by Carlin and Louis (Sep. 08 ~ ) || Brad's class websites ||
Course Works in QME (Fall, 2006 to Spring, 2008):
- Statistics courses and their textbooks:
- Theory of Statistics (Fall, 2006 thru Spring, 2007) - Statistical Inference (Casella and Berger) ||
- Applied Statistical Methods (Fall, 2006 thru Spring, 2007) - Applied Linear Regression (Weisberg) || Extending the Linear Model with R (Faraway) || A first course in the design and analysis of experiments (Ohelert) || Mixed-Effects Models in S and S-PLUS (Pinheiro and Bates) ||
- Statistical Analysis of Longitudinal Data (Spring, 2007) - Applied longitudinal analysis (Fitzmaurice, Laird, Ware) || Linear mixed models for longitudinal data (Verbeke, Molenberghs) ||
- Hierarchical Linear Models (Summer, 2007) - Hierarchical Linear Models (Raudenbush and Bryk) ||
- Advanced Multiple Regression Analysis (Fall, 2007) - Applied Linear Statistical Models (Kutner) ||
- Latent Variables (Fall, 2007) - Making Sense of Factor Analysis || Principles and practice of Structural Equation Modeling || Generalized Latent Variable Modeling - Multilevel, Longitudinal, and Structural Equation Models ||
- Nonparametric Statistics in Education (Spring, 2008) - Course Package || An Introduction to the Bootstrap (Efron and Tibshirani) ||
- Measurement courses and their textbooks:
- Principles of Educational and Psychological Measurement (Fall, 2007)
- Advanced Measurement (Spring, 2008)
- Course Works :
- EPsy 5244 (Fall, 2006) || EPsy 5101 (Fall, 2006) || Stat 8101 (Fall, 2006) || Stat 8051 (Fall, 2006) ||
- EPsy 5271 (Spring, 2007) || EPsy 8282 (Spring, 2007) || Stat 8102 (Spring, 2007) || Stat 8052 (Spring, 2007) ||
- EPsy 5135 (Summer, 2007) || EPsy 5243 (Summer, 2007) || EPsy 5991 (Summer, 2007) || EPsy 8993 (Summer, 2007) ||
- EPsy 5221 (Fall, 2007) || EPsy 5247 (Fall, 2007) || EPsy 8215 (Fall, 2007) || EPsy 8264 (Fall, 2007) || PubH 7435 (Fall, 2007) ||
- EPsy 8222 (Spring, 2008) || EPsy 8271 (Spring, 2008) - Study || EPsy8290 (Spring, 2008)-Equating || EPsy 8905 (Spring, 2008) || EPsy 8272 (Spring, 2008) - Study ||
Teaching and Research Assistances:
- Fall, 2009 - STAT 3011 (Introduction to Statistical Analysis) : Lecturer
- Consulting : ORC || Periods: Summer, 2008 ~ August, 2009 ||
- Research assistance : CATALST || Periods: Summer, 2008 ~ ||
- Spring, 2009 - EPsy 5261 (Introducotry Statistical Methods) : Lecturer
- Fall, 2008 - EPsy 8282 (Longitudinal Data Analysis) : Teaching Assistant (Lecturer - Prof. Jeff Long)
- Fall, 2008 - EPsy 5261 (Introductory Statistical Methods) : Teaching Assistant (Lecturer - Michelle Everson, PhD)
- Research assistance : Chicago Longitudinal Study || Periods: Summer, 2007 ~ Spring, 2008 ||
- Spring, 2007 - EPsy 8261 (Statistical Methods I) : Teaching Assistant (Lecturer - Prof. Bob DelMas)
- Fall, 2006 - EPsy 8261(Statistical Methods I) :Teaching Assistant (Lecturer - Prof. Jeff Long)
- Summer, 2001 and Summer, 2006 : Lecturer for Calculus
- Fall, 2001 ~ Spring, 2006 : Teaching Assistant at the School of Mathematics (Univ. of Minnesota)
- Fall, 1999 ~ Spring, 2001 : Teaching Assistant at Mathematics and Statistics Department (Univ. of Maine)