Dr Paul Dudgeon

B.Sc. (Hons.), M.Sc., Ph.D.

Senior Lecturer

Contact details:

I teach quantitative methods in the Department, primarily in the areas of research methods, structural equation modelling, multilevel modelling, item response modelling and regression. My research interests broadly cover two main areas: (a) the use of structural equation modelling and multilevel modelling, and (b) the application of quantitative methods to psychological data, especially in the area of the psychopathology of psychotic disorders. As well as my own research in these two areas, I am also involved in a large scale longitudinal study of affect regulation in early adolescence that is headed by Associate Professor Nick Allen at the ORYGEN Research Centre in Parkville, and have ongoing research collaborations with a number of researchers at the ORYGEN Research Centre. Computer programs I have written can be downloaded from my personal website listed above, and it contains a link to a listing of general quantitative methods resources.

Research Interests:

• Quantitative Psychology
  • Structural equation modelling
  • Item response modelling
  • Categorical data analysis
  • Test theory
  • Method effects in psychological measurement
  • Modelling psychopathology data
  • Use of Bayesian belief networks in diagnosing psychotic disorder

Professional Associations, Memberships & Awards:

• Psychometric Society
• Member of Consulting Board of Reviewers for Computers in Human Behavior
• Ad Hoc Reviewer for Psychometrika, Psychological Methods, British Journal of Mathematical and Statistical Psychology, Addition, Social Psychiatry and Psychiatric Epidemiology
• Member of the Academic Advisory Board for Undergraduate Psychology Programs, Deakin University
• Statistical Consultant to Department of Psychology, Murdoch Children's Research Institute, Royal Children's Hospital, Melbourne
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Selected Publications:

Refereed Journal Articles:

Dudgeon, P. (2004). "A Note on Extending Steiger's (1998) Multiple Sample RMSEA Adjustment to Other Noncentrality Parameter-based Statistics". Structural Equation Modeling, 11, pp 305–319.

Dudgeon, P., Mackinnon, A. J., Bell, R. C., & McGorry, P. D. (2001). "Failure to Confirm the Three Domains Model of Psychosis" [Letter] Archives of General Psychiatry, 58, pp 94–96.

Jackson H. McGorry P., Henry L., Edwards J., Hulbert C., Harrigan S., Dudgeon P., Francey S., Maude D., Cocks J., & Power P.(2001). "Cognitively Oriented Psychotherapy for Early Psychosis (COPE): A 1-Year Follow-up", British Journal of Clinical Psychology, 40 , pp 57–70.

Velakoulis, D., Pantelis, C., McGorry, P. D., Dudgeon, P., Brewer, W., Cook, M., Desmond, P., Bridle, N., Tierney, P., Murrie, V., Singh, B., & Copolov, D. (1999). "Smaller Hippocampi in Chronic Schizophrenia, First-episode Schizophrenia and First-episode Affective Psychosis: A High Resolution Magnetic Resonance Imaging Study", Archives of General Psychiatry, 56, pp 133–140 .

Bell, R. C., Dudgeon, P., McGorry, P. D., & Jackson, H. J. (1998). "The Dimensionality of Schizophrenia Concepts in First-episode Psychosis", Acta Psychiatrica Scandinavica, 97, pp 334-342.

McGorry, P. D., Bell, R. C., Dudgeon, P., & Jackson, H. J. (1998) "The Dimensional Structure of First-episode Psychosis: An Exploratory Factor Analysis", Psychological Medicine, 28, pp 935-947.

Bentler, P. M., & Dudgeon, P. (1996) "Covariance Structure Analysis: Statistical Practice, Theory and Directions", Annual Review of Psychology, 47, pp 563-592.

Jackson, H. J., McGorry, P. D., & Dudgeon, P. (1995). "Prodromal Symptoms of Schizophrenia in First-episode Psychosis: Prevalence and Specificity", Comprehensive Psychiatry, 36, pp 241–250.

Dudgeon, P. (1994). "A Reparameterization of the Restricted Factor Analysis Model for Multitrait/Multimethod Matrices", British Journal of Mathematical and Statistical Psychology, 47, pp 283–308.

PhD Students under Supervision:

Andre Gomez, Susy Harrigan