Title Is the Betwixt application effective and acceptable in improving emotion regulation for an adult clinical population? Short title Betwixt: Effective/acceptable clinical population emotion regulation? Chief Investigator Jacob Andrews Aims A: Evaluate the effectiveness of the Betwixt intervention on emotion regulation, self-compassion, and cognitive reappraisal in a clinical population. B: Investigate whether changes in processes targeted by Betwixt result in improvements in clinical outcomes. C: Explore the acceptability, and putative processes of Betwixt within a clinical context. Trial configuration Single Case Experimental Design (SCED) series and acceptability and change interviews Setting Lincolnshire Partnership Foundation Trust Sample size estimate Minimum of three cases recommended Number of participants Eight (with replacement participants if they do not contribute sufficient data to the intervention phase) Eligibility criteria Inclusion criteria for IAPT services: Adult, on the waiting list for the service, experiencing an anxiety disorder or depression, own a mobile phone, and comfortable using a phone for an extended period. Able to give informed consent. Exclusion criteria: Insufficient English reading ability and not available for the length of the intervention. Description of interventions The intervention is an interactive game called Betwixt, which is delivered to participants via an app. Betwixt is a theory-driven app with foundations in emotion regulation, cognitive behavioural therapy, and mindfulness. Each participant will have access to the app for four weeks and will be asked to use it every two days. Duration of study Overall: 24 months Per participant: Seven weeks Outcome measures CER-Q, DERS-SF, GAD-2, GAD-7, PHQ-2, PHQ-9, SCS, SWEMWBS and WSAS Analytical methods Structured visual analysis; Kendall's Tau-U; Reliable Change and Clinically Significant Change analysis; Simulation Modelling Analysis; and Framework Analysis.
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Difficulties in Emotion Regulation Scale - Short Form (DERS-SF)
Timeframe: Every second day from enrolment to the end of study (6 or 7 weeks per participant).
Patient Health Questionnaire-2 (PHQ-2)
Timeframe: Every second day from enrolment to the end of study (6 or 7 weeks per participant).
Generalised Anxiety Disorder-2 (GAD-2)
Timeframe: Every second day from enrolment to the end of study (6 or 7 weeks per participant).