Study: NCT05136638

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: dCBTi
Description: The dCBTi adopts a multi-module approach, consisted of 6 weekly modules including psychoeducational on sleep, insomnia, sleep hygiene, sleep restriction and prescription, stimulus control, relaxation and worry time, cognitive restructuring, and relapse prevention. In each module, participants will watch short videos to learn strategies to improve their sleep.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: dCBTi
Description: The dCBTi adopts a multi-module approach, consisted of 6 weekly modules including psychoeducational on sleep, insomnia, sleep hygiene, sleep restriction and prescription, stimulus control, relaxation and worry time, cognitive restructuring, and relapse prevention. In each module, participants will watch short videos to learn strategies to improve their sleep.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: dCBTi
Description: The dCBTi adopts a multi-module approach, consisted of 6 weekly modules including psychoeducational on sleep, insomnia, sleep hygiene, sleep restriction and prescription, stimulus control, relaxation and worry time, cognitive restructuring, and relapse prevention. In each module, participants will watch short videos to learn strategies to improve their sleep.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: dCBTi
Description: The dCBTi adopts a multi-module approach, consisted of 6 weekly modules including psychoeducational on sleep, insomnia, sleep hygiene, sleep restriction and prescription, stimulus control, relaxation and worry time, cognitive restructuring, and relapse prevention. In each module, participants will watch short videos to learn strategies to improve their sleep.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Virtual coaching
Description: A virtual coach will be added to the app functionality. It will be in the form of a text-based forced-choice conversation bot. It will initiate conversations with the users to check their understanding of treatment materials and guide them to come up with specific action plans to implement the treatment strategies.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Virtual coaching
Description: A virtual coach will be added to the app functionality. It will be in the form of a text-based forced-choice conversation bot. It will initiate conversations with the users to check their understanding of treatment materials and guide them to come up with specific action plans to implement the treatment strategies.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Virtual coaching
Description: A virtual coach will be added to the app functionality. It will be in the form of a text-based forced-choice conversation bot. It will initiate conversations with the users to check their understanding of treatment materials and guide them to come up with specific action plans to implement the treatment strategies.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Non-therapist coaching
Description: A research intern will answer questions and address concerns raised by the participant at the end of modules 1, 3, and 6 by phone. The contact time will be within 30 minutes on each occasion.

Intervention type: BEHAVIORAL
Group type: EXPERIMENTAL
Intervention: Therapist coaching
Description: A clinical psychology trainee will provide therapeutic support to enhance the use and adherence to CBTi treatment strategies at the end of modules 1, 3, and 6 by phone. The contact time will be within 30 minutes on each occasion.