Thaddeus Tarpey
Office address:
Education:
Ph.D. Mathematics, May 1992, Indiana University
Mathematics Department,
M.A. Mathematics, May 1987, Mathematics Department, Indiana
University,
B.A. Mathematics, May 1983,
Experience:
Senior Biostatistician, Columbia University/New York State Psychiatric Institute, 1051 Riverside Drive, New York, New York 10032. September, 2001 -- August, 2002; summer 2003.
Statistical Consultant, Procter & Gamble Pharmaceuticals,
National Research Council Postdoctorate
Associate,
The National Institute of Standards and
Technology,
Statistical Consultant,
Assistant Instructor in
Publications: (Click here to see recent papers)
1. Flury, B. and Tarpey, T. (1993), "Representing a Large Collection of Curves: A Case for Principal Points,'' The American Statistician, 47, 304-306.
2. Tarpey, T. (1994), "Two Principal Points of Symmetric, Strongly Unimodal Distributions,'' Statistics and Probability Letters, 20, 253-257.
3. Tarpey, T. (1995), "Principal Points and Self--Consistent Points of Symmetric Multivariate Distributions,'' Journal of Multivariate Analysis, 53, 39--51.
4. Tarpey, T., Li, L. and Flury, B. (1995), "Principal Points and Self--Consistent Points of Elliptical Distributions,'' The Annals of Statistics, 23, 103--112.
5. Tarpey, T. and Flury, B. (1996), "Self--Consistency: A Fundamental Concept in Statistics,'' Statistical Science, 11, 229-243.
6. Tarpey, T. (1997), "Estimating Principal Points of Univariate Distributions,'' Journal of Applied Statistics, 24, 483-496.
7. Flury, B. and Tarpey,
T. (1998), "Principal Points.'' In Encyclopedia of Statistical
Science,
Update Volume 2, Kotz, S., Read, C., and
Banks, D.
Eds. Wiley:
8. Tarpey, T. (1998), "Self--Consistent Patterns for Symmetric Multivariate Distributions,'' The Journal of Classification, 15, 57-79.
9. Tarpey, T. (1999), "Self--Consistency and Principal Component Analysis,'' Journal of the American Statistical Association, 94, 456--467.
10. Flury, B. and Tarpey,
T. (1999), "Self--Consistency (Update),'' In
Encyclopedia
of Statistical Science, Update Volume 3, Kotz,
S., Read, C., and Banks, D. Eds. Wiley:
11. Tarpey, T. (1999), "Self--Consistency Algorithms,'' Journal of Computational and Graphical Statistics, 8, 889-905.
12. Tarpey, T. (2000), "A Note on the PRESS Statistic for Restricted Least Squares,'' The American Statistician, 54, 116-118.
13. Tarpey, T. and John Holcomb (2000), "Spline Bottles,'' The American Statistician,54, 129-135.
14. Tarpey, T. (2000), "Parallel Principal Axes,'' Journal of Multivariate Analysis, 75, 295-313.
15. Tarpey, T., Acuna, C., Cobb, G. and DeVeaux, D. (2002), "Curriculum Guidelines for Bachelor of Arts Degrees in Statistical Science,'' Journal of Statistical Education, 10, July 2002.
16. Tarpey, T. (2003), "Estimating the Average Slope,'' Journal of Applied Statistics, 30, 389-396.
17. Tarpey, T. and Kinateder, K., (2003), "Clustering Functional Data," The Journal of Classification, 20, 93-114.
18. Tarpey, T., Petkova, E. and Ogden, R. T., (2003), "Profiling Placebo Responders by Self-Consistent Partitions of Functional Data,'' Journal of the American Statistical Association, 98, 850-858 .
19. Tarpey, T., and
Sanders, R.
D., (2004), ``Linear Conditional Expectation for Discrete Distributions,''
Journal
of Applied Statistics, 31, 361-372.
20. Goldstein,
G., Sanders, R. D., Forman, S. D., Tarpey,
T., Gurklis, J.A., Van Kammen, D. P.
& Keshavan, M. S., (2005), "The effects of antipsychotic
medication on factor and cluster structureof
neurologic
examination abnormalities in schizophrenia,'' Schizophrenia Research,
75, 55-64.
21. Sanders, R. D.,
Allen, D. N., Forman, S. D., Tarpey, T., Keshavan
M. S. and
Goldstein, G, (2005), "Confirmatory factor analysis of the Neurological
Evaluation
Scale in unmedicated
schizophrenia,'' Psychiatry
Research, 133, 65-71.
22. Ogden, R. T. and Tarpey,
T., (2006), "Estimation in Regression Models with Externally
Estimated Parameters,'' Biostatistics,
7, 115-129.
23. Tarpey, T. and Ivey, C. T., (2006),
"Allometric Extension for Multivariate
Regression
Models,'' Journal
of Data
Science, 4, 479-495.
24. Tarpey, T., (2007), "Linear Transformations and the k-Means Clustering Algorithm: Applications to Clustering Curves,'' The American Statistician, 61, 34-40.
25. Tarpey, T.,
(2007),
"A Parametric
k-Means Algorithm," Computational Statistics, 22, 71-89.
26. Tarpey, T., Yun, D., and Petkova, E., (2007), "Model
Misspecification: Finite Mixture or Homogeneous?", Statistical
Modelling, 7, 321-340.
Tarpey, T. and Krane, D., "Measuring Intraspecies Genetic Diversity Using RAPD-PCR Profiles," Department of Mathematics and Statistics, Wright State University, Technical Report \# M/S 05.02.
Unrefereed Publications:
Ogden, R. T., Tarpey,
T., Mann, J. J., and Parsey,
R. V. (2003)., ``Standard
Errors for
Parameter Estimation in Kinetic
Modeling with an Input Function,'' Journal of Cerebral Blood Flow
and Metabolism,
23\/: S672.
Principal Points, Joint Newsletter for the Physical and
Engineering
Sciences Section and the Quality and Productivity Section of the
American
Statistical Association, 2, 12--13 (1996).
Grants Funded:
NIMH Grant Number: 1 R01
MH068401-01A2, Principal Investigator
Project Title: "Identifying Placebo Responders in Drug Treated
Subjects"
Invited Talks:
"Curriculum Guidelines for Bachelor Degrees in Statistical Science," at the University of Dayton, April 22, 2005.
"Identification of Placebo Responders Among
Drug
Treated Subjects,'' 2003 Spring ENAR meeting in
"Identifying Placebo Responders Among Depressed Subjects Treated
with
Active Drug - A Functional Data Approach," at the 4th Annual
Columbia-Penn
Statistics in Psychiatry Symposium, April 30, 2002 at the
"Clustering Functional Data: Application to Identification of Placebo Responders,'' at Columbia University Department of Statistics, April 29, 2002.
"Clustering Functional Data,'' at Columbia University Biostatistics Department, October 18, 2001.
Invited Panelist at the session entitled "Implementing
the USEI Guidelines for Undergraduate Programs in Statistics,'' during
the
Joint Statistics Meetings in
"Cluster Analsis for Functional Data", presented at the Department of Mathematics and Statistics at Miami University, November 2, 2000.
"Measuring Intraspecies Genetic Diversity Using RAPD-PCR Profiles," presented at Department of Statistics at Purdue University, September 14, 1999.
"Self--Consistency and Principal Components," presented at the Carnegie Mellon University Statistics Department, December 2, 1998.
"Self--Consistency and Principal Components," presented at Indiana University Mathematics Department, September 11, 1997.
"The Statistical Analysis of Multiple Endpoints in Clinical Trials,"<> presented at the 1997 Procter & Gamble Symposium, October 6, 1997 (with Michael Meredith)."Introductory Statistics Courses in the Current Climate of Change," presented to the 1996--1997 Class of Project NExT Fellows at the Summer Workshop, University of Washington, Seattle, Washington, August 9, 1996.
"Self--Consistency: A Fundamental Concept in Statistics,"
"Principal Points and Self--Consistent Points of Elliptical
Distributions," Joint Statistics Meetings,
Other Talks:
"A Modelling Controversy: Finite Mixture or Homogeneous,'' presented at the Joint Statistics Meetings in Salt Lake City, July 31, 2007.
"Latent Regression Analysis," contributed talk at
the Joint Statistics Meetings, Seattle, Washington, August 2006.
"Functional Data Analysis Issues for Identifying Placebo Response in
Drug Treated Subjects,'' presented at ENAR Biometric Society Meetings,
Austin, Texas, March 22, 2005.
"Identification of Placebo Responders Among
Drug-Treated
Subjects,'' presented at the Joint Meetings of the ASA in
"Allometric Extension for Multivariate
Regression,'' contributed paper at the Joint Statistics Meetings in
"Cluster Analysis for Functional Data,'' contributed paper at the
Joint Statisitics Meetings in
"Curriculum Guidelines for Bachelor of Arts Degrees in Statistical
Science,'' presented at the Undergraduate Statistics Education
Symposium during
the Joint Statistics Meetings in
"Spline Bottles,'' presented at a
special
contributed session of the Joint Statistics Meetings in
"Characterization Results on Self--Consistency for Elliptical
Distributions,'' presented at the Joint Statistics Meetings in
"Self--Consistency and Orthant
Symmetry,''
contributed talk at the Joint Statistical Meetings,
'Self--Consistency: A Unified Theoretical Framework for Principal
Components, Principal Curves, and Principal Points,'' contributed talk
at WNAR,
'Self--Consistent Patterns -- Approximating Multivariate
Distributions by
Representative Points,'' contributed talk at the ASA Winter Meeting,
"A Comparison of Estimators for Principal Points of Univariate
Distributions,'' contributed talk at the 4th Conference of the
International
Federation of Classification Societies,
"Two Principal Points for Symmetric, Strongly Unimodal
Distributions,'' contributed talk at WNAR 1993 Meeting,
Seminars and Colloquium at WSU:
"A Modeling Controversy: Homogeneous or Mixture?"
(with Dong Yun), October 25, 2006.
"Remarks on k-Means Clustering of Functional Data," May 4, 2006.
"Parametric k-means Algorithm," November 8, 2005.
"Latent Regression Analysis," October 21, 2005.
"Estimation in Regression Models with Externally Estimated
Parameters," November 18, 2004.
"The Exaggeration Effect: Students’ Estimation of Exam Performance," with Doug Andrews, Fall 2003.
"Allometric Extension for Multivariate Regression Models,'' October 4, 2002.
"Identifying Placebo Responders Among Subjects Treated with an Active Drug,'' September 27, 2002 (Deparment of Mathematics and Statistics Colloquium).
"Curriculum Guidelines for an Undergraduate Major in Statistics,'' January 10, 2001.
"Estimating the Average Slope of a Polynomial,'' May 15, 2000.
"Principal Points for Functional Data,'' April 10, 2000.
"Measuring Intraspecies Genetic Diversity Using RAPD-PCR Profiles,'' September 27, 1999 (with Dan Krane).
"The Self-Consistency Algorithm,'' April 19, 1999.
"The PRESS Statistic for Restricted Least Squares and Spline Bottles,'' October 21, 1998.
"Parallel Principal Components Revisited: Borel's Paradox and Allometric Extension,'' October 7, 1998.
"Self--Consistency and Principal Components II,'' January 13, 1998.
"The EM Algorithm for Elliptical Distributions,'' January 27, 1998.
"Adjusted p--values and Proc MULTTEST,'' October 15, 1997.
"Multiple Endpoints,'' October 1, 1997.
"The Disappearance of .400 Hitting in Baseball -- A Discussion of S. J. Gould's Book `Full House','' April 17, 1997.
"Parallel Principal Axes,'' February 10, 1997.
"Self--Consistency and Principal Components,'' October 15, 1996.
"Asymptotic Results on Principal Points,'' October 17, 1995.
"A Look at Symmetric Multivariate Distributions,'' January, 24, 1995.
"Self--Consistency: A Unified Approach to Principal Components, Principal Curves and Principal Points,'' September 1994.
Paper Refereeing:
Associate Editor of The American
Statistician (2005 - present)
I have refereed papers for the following journals:
The Annals of the Institute of Statistical Mathematics,Awards and Honors:
Phi Beta Kappa (1983)
National Research Council Postdoctorate Associate (1992)
Project NExT Fellow
(1995) --
attended Joint Mathematics meetings in
Professional Organizations:
American Statistical Association
Institute of Mathematical Statistics
Teaching:
Topics in Linear Models (STT 762), Applied Regression Analysis (STT
767),
Applied Multivariate Analysis (STT 744), Sampling Design (STT 721),
Statistical Modeling for Environmental Data (ES and STT 714), Theory of
Statistics (STT 661/662), Statistical Methods (STT 466/666 and STT
467/667),
Biostatistics (STT 430/630), Elementary Statistics (STT 264, STT 265),
Engineering Statistics (STT 363), Applied Statistics (STT 360/561 and
STT
361/561),
Introduction to SAS (STT 367/567), Introductory Statistics
(Indiana
University), College Algebra (Indiana University), Business Calculus
(Indiana
University),
Finite Mathematics (Indiana University).
Professional Activities:
Elected President of the Dayton Chapter of the American Statistical
Association for 1996, 1997, 2004, 2005 and elected secretary-treasurer
of the Dayton Chapter 2002-2004.
Judge at
Last updated August 31, 2007