Evaluating an Internet-based Program for Anxious Adolescents

This study is a randomized controlled trial (RCT) with two groups, an Internet-delivered cognitive behavioural therapy (CBT) experimental group (Breathe) and a resource webpage (control group; considered treatment as usual for youth waiting for services). The investigators will evaluate several methodological processes and outcomes through the following objectives: 1. To determine the effectiveness of a self-guided Internet-based CBT program with limited telephone and email support in reducing anxiety symptoms among adolescents with mild-to-moderate anxiety as compared to a usual self-help intervention, a resource-based webpage. 2. To explore mediators and moderators of the Internet-based CBT program. 3. To determine the effectiveness of a self-guided Internet-based CBT program in improving quality of life as compared to a usual self-help intervention. 4. To determine adherence to a self-guided Internet-based CBT program. 5. To determine the cost-effectiveness of the Internet-based CBT program.