My main research focus is mediation of the effects of psychotherapeutic treatments in clinical trials. This is part of a wider interest in studying causal inference. I am evaluating potential mediators in the PACE trial of treatments for chronic fatigue syndrome in collaboration with Trudie Chalder and the other PACE investigators. I am also using PACE, and other trials of cognitive behavioural therapy, to study and develop methods such as instrumental variable estimation of mediated effects. Other interests include modelling longitudinal data and managing missing data in trials.

I trained as a basic scientist at McMaster University in Canada before obtaining a Master of Public Health in Biostatistics and Epidemiology at Oregon Health & Science University.

I have previous experience as a data manager and statistician in the areas of employment support for people with disabilities (in the United States), antimicrobial resistance, heart and lung diseases and clinical trials in mental health. I was a statistician in the Mental Health and Neurosciences CTU prior to commencing PhD studies.