Research Related Links
Research Areas
Conferences & Presentations
Publications
Software

Teaching
Social Science Statistics 1 (SSS1)
Statistics 1C (S1C)
Multivariate Statistics 3

Level 3 Co-ordinator
Level 3 General Information

Resources & Links
LaTeX Primer by D. R. Wilkins
R Primer by Christopher Green

Dissertation
Download my PhD. Dissertation [PDF]

Curriculum Vitae
Download my CV [PDF]

Other Links
School of Mathematics and Statistics Webpage

Statistics Subject Webpage

Research Areas

Unsupervised Learning

• Extending the current mixture modelling framework for clustering (of which model-based clustering and latent class analysis are examples) to allow for dependence between different types of variables.

• Exploring variable selection in the context of model-based clustering and latent class analysis.

• Estimation of student skill set profiles and fitting different clustering methods to the resulting restricted sample space.

• Combining mixture model density estimation with linkage clustering methods via a general density-based similarity measure to help in visualisation of cluster structure in high dimensional data, exploration of hierarchical cluster structure and modelling of complex cluster shapes.

Semi-supervised Learning

• Semi-supervised techniques involve using information from data without outcome information to help in the estimation of models for data with outcome information. This is particularly important when only a small proportion of data with known outcomes are available. My interests lie in the following areas:

• Exploring variable selection in the context of supervised and semi-supervised model-based discriminant analysis and latent class analysis.

• Adapting model-based discriminant analysis techniques in combination with model-based clustering methods into semi-supervised classification rules.

Areas of Application

• Educational testing, microarray studies, spectroscopic data, medical research, cognitive diagnosis, food authenticity studies, general social survey data, housing prices

Current Collaborators

• Rebecca Nugent (Carnegie Mellon University)

• Elizabeth Ayers (Graduate School of Education, University of California Berkeley)

• Gwilym Pryce (Department of Urban Studies, University of Glasgow)

• Adrian Raftery (University of Washington)

• Brendan Murphy (University College Dublin)

Other Research Activities

• Elected Treasurer (2011-present) of the International Federation of Classification Societies.

• Chair of the Distinguished Dissertation Award Committee (2012-present) for the Classification Society.

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