Study Protocol for a Smartphone Application-based Intervention for Subthreshold Depression

Study Protocol for a Pilot Randomized Controlled Trial on a Smartphone Application-based Intervention for Subthreshold Depression

The investigators plan to conduct a randomized controlled trial to examine whether a Smartphone-based Intervention improves subthreshold depression symptoms compared to no intervention.

The purpose of this pilot randomized controlled trial is to investigate the feasibility of the final randomized controlled trial.

Inclusion Criteria:

• 18 Years and older
• Males and females
• Center for Epidemiologic Studies Depression Scale score ≥16
• Written informed consent prior to participation
• Owns a smartphone with the iOS® operating system

Exclusion Criteria:

• Lifetime history of psychiatric disorders
• Currently receiving treatment for a mental health problem from a mental health professional
• Experience of a major depressive episode in the 2 weeks prior to the study, as ascertained using the Mini-International Neuropsychiatric Interview
• Vision or hearing deficits that negatively impact everyday life