Waitlist-Control Trial of Smartphone CBT for Obsessive-Compulsive Disorder (OCD)

The primary aims of this study are to test the feasibility, acceptability, and efficacy of a
Smartphone-based CBT treatment for adults with OCD recruited nationally. Eligible subjects
(N=30) will be randomly assigned to 12 weeks of Smartphone-delivered CBT for OCD either
immediately, or after a 12-week long waiting period (50-50 chance). The investigators
hypothesize that Smartphone-delivered CBT for OCD will be feasible and acceptable to
individuals with OCD, and that it will lead to greater reductions in OCD symptom severity
compared to the passage of time (waitlist control).

Inclusion Criteria:

- at least 18 years of age

- appropriate for outpatient level of care

- current diagnosis of primary DSM-5 OCD

- Score on Y-BOCS of ≥ 20

- currently living in the United States

Exclusion Criteria:

- Psychotropic medication changes within 2 months prior to enrollment i. Participants
taking psychotropic medication must have been on a stable dose for at least 2 months
prior to enrollment and not change medication during study period

- Past participation in 4+ sessions of CBT for OCD

- Current substance dependence

- Lifetime bipolar disorder or psychosis

- Acute, active suicidal ideation as indicated by clinical judgment and/or score on the
QIDS-SR (#12) >1

- Clinical features requiring a higher level of care

- Personality disorder that could compromise treatment participation (e.g., borderline
personality disorder with self-harm)

- Concurrent psychological treatment

- Does not own a supported mobile Smartphone with a data plan (currently iPhone 5S or
more recent, running iOS 9 or newer)

- Intellectual disability or other cognitive impairment that would interfere with
ability to engage in CBT

- Lack of technology literacy that would interfere with ability to engage with
smartphone treatment