Our Mission

Have you ever wondered...

Why and how do people change?
What keeps us from making changes that will improve our wellbeing?

My lab conducts research aiming at enhancing the understanding of the processes underlying health behaviour changes and translating this knowledge into effective and scalable interventions. Our research draws from learning theories and self-regulation theories of behaviour. With a focus on sleep, our current research aims to unravel the mechanisms underlying the link between sleep and behavioural health and to optimize the use of sleep interventions to improve the wellbeing of vulnerable individuals.


We use a range of methodologies in our research including longitudinal, experimental, and clinical trial designs.

Here is a list of our current studies:

Effects of experimental Sleep Restriction on Habitual Control of Eating Behaviour (HabEat)

The HabEat study examines how experimentally-induced sleep deprivation affects the habitual control of food-seeking behaviour.

Sleep Extension and Enhancement for patients with type 2 Diabetes (SEED)

The SEED study evaluates the efficacy of a sleep intervention for improving weight loss and glucose control in individuals who are diagnosed with T2DB or prediabetic individuals.

Meta-analysis of the effects of CBT-I on sleep duration

CBT-I has well-established efficacy for improving difficulty sleeping; it is unclear if CBT-I increases sleep duration. This meta-analysis evaluates existing findings.

Weight and Sleep Tracking during active weight loss and weight loss maintenance (WEST)

The WEST study examines changes in sleep parameters during active weight loss and weight loss maintenance.

Treatment outcomes of patients with comorbid insomnia and sleep apnea

We are reviewing electronic medical records to examine the impact of insomnia symptoms on the treatment outcomes of sleep apnea in patients with different medical and psychiatric comorbidities.

A feasibility trial of CBT-I for cancer patients in active cancer treatments

This trial evaluates the feasibility of delivering Cognitive Behavioural Therapy for Insomnia (CBT-I) for cancer patients who are receiving chemotherapy

Check out our publications here.


Principal Investigator

Dr. Wai Sze Chan is a researcher and a licensed clinical psycholoigst. She is currently an assistant professor at the Department of Psychology at the University of Hong Kong.

Research Team

Our team is composed of enthusiastic, curious, and talented postgraduate and undergraduate students. I also supervise credit-bearing research interns. Want to join us?


We collaborate with researchers around the world and across disciplines. Learn more about our current collaborations and contact us if you share our interests and are eager to team up!

Learn more about our research team here.


June 7, 2019 - we have started participant recruitment for our HabEat study!

May 16, 2019 - we have officially changed the name of our lab to Sleep, Self-regulation and Health Research Laboratory to more precisely indicate the nature of our research and our mission. We also created our lab logo!