Decision-making Impairments in OCD: An Integrated Behavioral Economics Model

Obsessive-Compulsive Disorder Clinical Trial

Official title:

Decision-making Impairments in OCD: An Integrated Behavioral Economics Model

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03420495
• Other study ID #: 2017P002668
• Status: Completed
• Phase: N/A
• Start date: May 3, 2018
• Est. completion date: November 15, 2019

Study information

• Verified date: March 2020
• Source: Massachusetts General Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The investigators are examining whether conditions of ambiguity during decision-making may prime intolerance of uncertainty beliefs (i.e., difficulties coping with ambiguity, unpredictability, and the future) and lead to impaired performance when individuals with obsessive-compulsive disorder (OCD) are making uncertain decisions compared to non-psychiatric controls.

Description:

The primary aims of this study are to examine the extent to which individuals with OCD avoid decisions that involve ambiguity through the use of self-report and behavioral measures. Specifically, the investigators will examine how individuals with OCD minimize risk at the expense of monetary profit under conditions of ambiguity (relative to risky but unambiguous options) compared to non-psychiatric controls utilizing a series of judgment and decision-making (JDM) tasks.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 69
• Est. completion date: November 15, 2019
• Est. primary completion date: November 15, 2019
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Adults (age 18+)

• Meet DSM-5 criteria for principal OCD (OCD group) or no current DSM-5 diagnosis (NPC group).

• Sufficient fluency of English to understand study procedures and questionnaires

• Ability to provide informed consent.

• Comfortable and capable of using a computer to complete computer-based decision-making tasks.

Exclusion Criteria:

• Color-blindness (which prevents completion of certain tasks)

• Acute psychosis, bipolar disorder, substance use disorder, or suicidality. All other diagnostic comorbidities will be permitted to foster the accrual of a clinically relevant sample.

• Serious neurological disorder or impairment (e.g., brain damage, blindness), attention deficit hyperactivity disorder (ADHD), intellectual disability, or autism.

Related Conditions & MeSH terms

• Obsessive-Compulsive Disorder

Intervention

Behavioral:
• Decision-Making Tasks
All participants will receive a structured diagnostic assessment and complete self-report questionnaires about cognitive factors, decision-making styles, and anxiety/mood symptoms. They then will be guided through three judgment and decision-making (JDM) paradigms (the Risk and Ambiguity Task, the Beads Task, and the Balloon Analogue Risk Task), each of which each has been modified to differ by whether the likelihood of potential adverse outcomes is provided (or whether it remains ambiguous).

Locations

Country	Name	City	State
United States	Massachusetts General Hospital	Boston	Massachusetts

Sponsors (2)

Lead Sponsor	Collaborator
Massachusetts General Hospital	Obsessive Compulsive Foundation

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Ambiguity aversion score on the Risk and Ambiguity Task	In the Risk and Ambiguity Task participants make repeated choices between a certain payoff vs. a gamble. On low ambiguity trials, the likelihood of the gamble is known (i.e., "risky" lottery). On high ambiguity trials, the likelihood of the gamble is unknown (i.e., "ambiguous" lottery). Ambiguity aversion = (number of 50% risky lotteries chosen / total number of 50% risky lotteries) - (# of ambiguous lotteries chosen / total number of ambiguous lotteries).	Day 1
Primary	Average adjusted pump scores on the Balloon Analogue Risk Task (BART)	In the BART participants blow up a series of virtual balloons. With each pump: (a) they earn 5 cents that accumulate in a temporary reserve, but (b) the likelihood of the balloon exploding increases. When this occurs participants lose the money in their temporary reserve. At any time, participants can choose to transfer their earnings to a permanent savings bank (and move to the next balloon). Thus, participants weigh the likelihood of the negative outcome (i.e., the balloon exploding and losing money) with the potential gains (i.e., 5 cents per pump). In the low ambiguity version of the task, the likelihood of the balloon exploding is known. In the high ambiguity version, the likelihood of the balloon exploding is unknown. The average adjusted pump score = average number of pumps on trials in which the balloons did not explode.	Day 1
Secondary	Money spent on draws to decision (DTD) in the Beads Task	The Beads Task is a probabilistic inference task in which participants gather as much information (i.e., beads) as they desire before feeling "certain" enough to decide from which jar the beads have come. Participants will start off with a fixed amount of money, and invest money for each bead requested. If they answer correctly, the money earned will be transferred to a savings bank; if incorrect, they lose any earnings from that trial. Thus, participants must consider the tradeoff between the number of beads they choose and their accuracy as they decide. In the low ambiguity version of the task, the ratio of colored beads inside the jar is known. In the high ambiguity version, the ratio of colored beads inside the jar is unknown.	Day 1
Secondary	Intolerance of Uncertainty Scale (IUS-12)	The IUS-12 measures reactions to uncertainty, ambiguity, and the future consisting of two subscales: Prospective and Inhibitory IU.	Day 1