“…Self-guided interventions are a promising avenue for increasing the efficiency, effectiveness, and reach of ACT. For example, a number of clinical trials in the past decade have found ACT to be effective when delivered through self-help books (e.g., Ritzert et al, 2016); websites (e.g., Lappalainen et al, 2014; Levin, Haeger, Pierce, & Twohig, 2017); and, most recently, mobile apps (e.g., Bricker, Wyszynski, Comstock, & Heffner, 2013; Torous, Levin, Ahern, & Oser, 2017). Common barriers that prevent individuals in need from accessing treatment include financial limitations, lack of local providers, and concerns about mental health stigma (Andrade et al, 2014).…”