During Phase 1 of this study screening algorithm will be validated against an unseen, prospective test dataset of approximately 2,000 users. All candidate predictor variables will be entered into a Signal Detection Analysis to confirm the sensitivity and specificity of the screen. Informed by the resultant algorithms, adaptive content will be developed that targets ED-specific cognitive distortions. To evaluate acceptability, adapted content will be piloted with approximately 200 individuals for a period of one month. Participant feedback and utilization data will inform content acceptability and feasibility. By the end of the first phase tailored content that is acceptable to individuals with specific symptom presentations will be developed.