Digital mental health interventions for recurrent binge eating

There will be two digital interventions delivered in this trial. The first will be a internet-based intervention designed to primarily target extreme dietary restraint as the mechanism to reduce binge eating. The internet intervention is composed of 4 sessions. 1. Psycho-education: information on what dieting means, when it can become harmful, and why it can promote binge eating. 2. Self-monitoring: the importance of monitoring behaviors, thoughts, and emotions related to food, eating, and dieting 3. Regular eating: participants taught how to adopt a pattern of regular, flexible eating approach. 4. Food exposure: participants are taught how to overcome fear and anxiety around "forbidden" foods. The second digital intervention will be delivered only via a smartphone app. The app is based on transdiagnostic CBT (Fairburn, 2008) in that it is designed to target a range of factors implicated in the maintenance of binge eating (e.g., overvaluation with weight/shape, extreme dietary restraint & mood intolerance). There are also 4 modules to this app: 1. Psychoeducation about binge eating and its cycle 2. Implementing self-monitoring and regular eating 3. Learning healthy coping strategies through acceptance, mindfulness, and problem solving 4. Building a better body image Each session/module of the two interventions will take around 30-60 minutes to complete, and participants will be encouraged to practice the strategies taught in each session on a daily basis. Therefore, total time commitment will vary from person to person. Participants will be encouraged to stay on each session for around 7 days prior to moving to the next session, although they will be instructed that they can go at a pace that suits themselves. The total duration of the interventions will be 4 weeks, though participants have the opportunity to continue using the interventions after this period. Each session/module will include: written text, quizzes/ interactive video or audio recordings discussing the content of the session and how to implement the prescribed strategies; downloadable handouts to complete the prescribed activities; and quizzes designed to consolidate learning. Adherence will be monitored by assessing whether participants complete each of the sessions/modules, including how much of the session/module will be completed.