A randomised controlled trial for the effect of symptom feedback on help-seeking for mental health issues.

INTERVENTION: Participants from a larger validation study of mental health screening questionnaires will also be able to opt in to a low‐intensity randomised controlled trial providing feedback about their symptoms. In the trial, participants will get feedback about their symptoms (intervention condition) or general feedback about symptoms in the population (control condition). This feedback will be for either depression symptoms, adult ADHD, or social phobia, depending on which screener is presented in the larger validation study. The feedback will be provided to the participants in the intervention online on a single screen. Prior to the feedback, participants will complete a brief set of questions on quality of life and service use. Following the feedback, participants will then complete another brief survey 3 months later. Respondents who choose to participate in the trial will only be identifiable through their provision of an email address. CONDITION: Help‐seeking Mental health issues PRIMARY OUTCOME: Help‐seeking behaviour (AHSQ: Actual Help‐Seeking Questionnaire). SECONDARY OUTCOME: Help‐seeking intentions (GHSQ: General Help‐Seeking Questionnaire). INCLUSION CRITERIA: All participants who opt‐in for participation by providing their email address. These participants will be from a larger national validation study of mental health screening questionnaires.