The Impact of Interpretation Bias Modification Training on Anger and Reactive Aggression

Study Overview
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Brief Summary
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Difficulties with anger control are reported in a number of psychological conditions and are associated with social problems, such as dating violence and workplace violence. High trait anger is a personality construct characterized by elevations in the frequency, duration, and intensity of anger episodes. However, the cognitive processes contributing to high trait anger are still poorly understood. This study will examine the effectiveness of a computer-based cognitive bias modification (CBM) program designed to target hostile interpretations associated with high trait anger.

Detailed Description
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High trait anger is a personality construct characterized by elevations in the frequency, duration, and intensity of anger episodes. According to the Integrative Cognitive Model (ICM) of anger, three cognitive processes jointly contribute to an individual's level of trait anger and reactive aggression: hostile attributions, ruminative attention, and effortful control processes. Specifically, individuals high in trait anger are more prone to interpret ambiguous situations as hostile; are more likely to ruminate about anger-related events; and have a more limited capacity to employ control processes when they become angry. One means of evaluating unconscious biases that has become increasingly popular is cognitive bias modification (CBM). CBM programs are computerized training paradigms, which aim to train more adaptive cognitive biases by repeatedly exposing participants to an experimental contingency between an emotional stimulus and a response.Previous researchers have begun to investigate the impact of CBMs targeting cognitive control and hostile attribution bias in relation to anger. However, these studies have been conducted exclusively in samples reporting low trait anger. This study will examine the effectiveness of a short-term interpretation bias modification program (CBM-I) on hostile attribution biases and reactive aggression in a sample of undergraduate students eporting high trait anger.

Official Title
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An Investigation of the Short-term Impact of Interpretation Bias Modification Training on Anger Symptoms, Reactive Aggression, and Attentional Biases Toward Anger-related Stimuli

Conditions
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Anger

Intervention / Treatment
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* Behavioral: Interpretation Bias Modification
* Behavioral: Control Training Program


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 1. Students scoring 22 or higher on the Trait Anger Scale. Exclusion Criteria: Reports currently receiving psychological treatment or counseling for anger. Reports changes in psychiatric medication within the last month. Endorsement of current psychosis or bipolar disorder symptoms. Indicates poor English language proficiency.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Interpretation bias modification program<br>Participants in this arm will complete a computer-based training program two times in the lab. Participants will complete the first training session in the lab during their initial visit and they will return to the lab one week later to complete the second session. | Behavioral: Interpretation Bias Modification<br>* A computer based interpretation bias modification program that aims to reinforce neutral interpretations of ambiguous social situations.<br>|
| Sham Comparator: Control training program<br>Participants in this arm will complete a sham training program two times in the lab. The program will look similar in length and design to the experimental training program, but the content of the program will remain affectively neutral. As in the experimental condition, participants will complete the first training session in the lab during their initial visit and they will return to the lab one week later to complete the second session. | Behavioral: Control Training Program<br>* A sham training program that is similar in design and delivery to the experimental training condition.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| State-Trait Anger Expression Inventory 2nd Edition | A self-report measure of the experience of anger. | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 
| Interpretation Bias Assessment | A computer-based measure of hostile interpretation bias involving ambiguous social scenarios. | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Anger Rumination Scale | A self-report measure of the degree to individuals focus on experiences with anger. The scale is comprised of four subscales, angry after thoughts (e.g., Whenever I experience anger, I keep thinking about it for a while), angry memories (e.g., I re-enact the anger episode in my mind after it has happened), understanding causes (e.g., When someone provokes me, I keep wondering why this should have happened to me), and thoughts of revenge (e.g. I have difficulty forgiving people who have hurt me.). Participants will be asked to read each item and rate it in terms of how well it reflects their experience on a 4-point scale from 1 (almost never) to 4 (almost always). Totals for each sub scale will be summed to produce a total score (range: 19-76), with higher scores indicating a greater propensity for rumination. | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 
| Social Information Processing-Attribution and Emotional Response Questionnaire | A self-report measure of evaluate social information processing biases associated with hostile attribution bias. | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 
| Word Sentence Association Paradigm-Hostility | A behavioural measure of hostile attribution biases involving hostile and non-hostile words. | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 
| Depression and Anxiety Stress Scale-21 | A self-report measure of depression, anxiety, and stress symptoms. A self-report measure of depression, anxiety, and stress symptoms.Items are summed for each subscale to create subscale totals (i.e., depression, anxiety, and stress), with higher scores reflecting more severe emotional distress. Symptom score ranges include: normal (0-4), mild (5-6), moderate (7-10), severe (11-13), and extremely severe (14+). | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 
| Dot Probe | A behavioural measure of attentional bias towards angry faces. | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 
| Reactive-Proactive Aggression Questionnaire | A self-report measure of an individual's propensity for reactive aggression. | Administered two times over the course of one week. Changes will be examined from visit 1 (before CBM training program) to visit 2 (after CBM training program). | 
| Taylor Aggression Paradigm | A behavioural measure of reactive aggression. | Administered one time over the course of one week. Participants will be exposed to the paradigm following the second training session. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Reactive aggression, High trait anger, Cognitive bias modification, Interpretation bias modification