Imperial College London

Dr Gaby Judah

Faculty of MedicineDepartment of Surgery & Cancer

Non-Clinical Lecturer in Behavioural Sciences







Queen Elizabeth the Queen Mother Wing (QEQM)St Mary's Campus





Gaby Judah is a psychologist working on behaviour change in the Patient Safety Translational Research Centre (PSTRC) at the Institute of Global Health Innovation, Imperial College London.  Work within PSTRC focuses on the applying behavioural sciences to the theme of Safer Systems across the Transition of Care. She completed her PhD from the London School of Hygiene and Tropical Medicine (LSHTM) in 2014, investigating the psychological determinants of habit formation of health related behaviours.  Gaby completed an MSc with distinction in Research Methods in Psychology from UCL.  

Present research

Current projects include reducing burnout in clinicians, investigating determinants of medication adherence particularly in patients with hypertension and those taking statins, increasing cancer screening uptake, promoting physical activity in breast cancer survivors to reduce recurrence, and improving the discharge process to ensure safer transitions between secondary and primary care. 

Recent work has tested the impact of different types of financial incentives on attendance at diabetic eye screening appointments. 

Research interests

I am interested in applying behaviour change principles to improve the health of patients and the public, and to improve patient safety. To achieve this, my work focuses on learning about predictors of health related behaviours, as well as how to apply these to encourage sustained behaviour change.  


Under review

Johnson, M-C., Judah, G., Cunningham, D., Olander, E. Feasibility Study- Individual Physical Activity Behaviour Change Intervention for Breast Cancer Survivors within the NHS


Huf, S., King, D., Kerrison, R., Chadborn, T., Richmond, A., Cunningham, D., Friedman, E., Shukla, H., Tseng, F-M., Judah, G., Vlaev, I., Darzi, A. Behavioural text message reminders to improve participation in cervical screening: A randomised controlled trial. Preventative Medicine



Judah G, Mullan B, Yee M, et al., 2020, A habit-based randomised controlled trial to reduce sugar-sweetened beverage consumption: the impact of the substituted beverage on behaviour and habit strength, International Journal of Behavioral Medicine, ISSN:1070-5503

Markiewicz O, Lavelle M, Lorencatto F, et al., 2020, Threats to safe transitions from hospital to home: a consensus study in North West London primary care, British Journal of General Practice, Vol:70, ISSN:0960-1643, Pages:e9-e19

Judah G, Gardner B, Kenward MG, et al., 2018, Exploratory study of the impact of perceived reward on habit formation, Bmc Psychology, Vol:6, ISSN:2050-7283, Pages:62-62

Judah G, Darzi A, Vlaev I, et al., 2018, Financial disincentives? A three-armed randomised controlled trial of the effect of financial Incentives in Diabetic Eye Assessment by Screening (IDEAS) trial, British Journal of Ophthalmology, Vol:102, ISSN:0007-1161, Pages:1014-1020

Bodansky D, Oskrochi Y, Judah G, et al., 2017, Change the habit to change the practice: Do audits really ever change anything?, Injury, Vol:48, ISSN:0020-1383, Pages:1999-2002

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