ClinicalTrials.gg
CompletedNCT03372915Updated Dec 17, 2020

Test of an Inhibitory Learning Model of Extinction in Treatment of Anxious Youth

An interventional study of Standard Exposure and Exposure + Inhibitory Learning in Anxiety Disorders, sponsored by University of Colorado, Denver. Completed at 1 site in United States. Open to participants aged 7 Years to 17 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2020-12-17.

Sponsored by University of Colorado, Denver · Not applicable, Interventional, and Treatment

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Phase
Not applicable
Study type
Interventional
Enrollment
28
Allocation
Randomized
Ages
7 Years to 17 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 23 studies in Anxiety Disorders by University of Colorado, Denver — 7 open to participants now, 9 under way, none of them phase 3. Anxiety Disorders · University of Colorado, Denver.

Enrollment
17th of 22
28 · median 74
Started
2018
with 3 others
No phase
17 of 23
6 open now
Registered
7th of 23
by date

Among the 23 studies in Anxiety Disorders by University of Colorado, Denver, this one is the 17th largest by enrollment of the 22 interventional ones that give a count, is one of 4 that started in 2018, is one of 17 with no phase, and was the 7th registered.

Anxiety Disorders

7,207 studies on the registry are indexed under Anxiety Disorders; 1,682 are open to participants now.

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Open to participants now

7 of the 23 studies in Anxiety Disorders by University of Colorado, Denver are open now, in 1 country. Recruiting first, the newest first:

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By country, each count listing its studies:

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Where they have run

Who these studies take

Of the 944 Anxiety Disorders studies recruiting now, 417 (44%) set no upper age limit and 460 (49%) stop at 75 or younger; 233 take children under 18; 317 take healthy volunteers.

This study: 7 Years to 17 Years · all sexes · healthy volunteers too.

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02

Study summary

Recently, basic research conducted in adults has revealed that fear extinction, or the weakening of a learned fear response, may be best explained by principles of "inhibitory learning." New guidelines for the clinical practice of exposure therapy for anxiety disorders have arisen from research on inhibitory learning, but these guidelines have not yet been empirically tested in youth with anxiety disorders. The overall goal of this research is to investigate the acceptability, feasibility, and efficacy of conducting exposure therapy for anxiety disorders in youth according to clinical guidelines developed from basic research on inhibitory learning principles, using a pilot randomized controlled trial design.

Read the detailed description

Exposure therapy-which involves repeatedly exposing individuals to feared situations to change their fear responses to and beliefs about those situations--has been a mainstay of treatments for anxiety disorders since it was developed in the 1950s. Today, exposure therapy is the most commonly-occurring treatment technique included in well-supported treatments for anxiety disorders, and meta-analyses have indicated that exposure is more strongly associated with treatment gains in anxious youth compared to non-behavioral interventions. Despite its effectiveness, approximately 40% of anxious youth fail to achieve clinically significant benefit from exposure therapy. This indicates that further research is needed regarding strategies for optimizing exposure therapy so that it is effective for a greater proportion of youth.

There is clearly a need to optimize exposure therapy for youth, but at the same time very little empirical data exists regarding how exposure works or the best way to conduct exposures. Common wisdom about exposure, based on emotional processing theory, dictates that exposure works by breaking and eliminating conditioned fear responses through a process called habituation. This viewpoint dictates that exposure should be conducted until habituation occurs (i.e., until a physiological fear response reduces by at least 50%), and that habituation both during and between exposure sessions is necessary for improvement. As exposure therapy has evolved, other common practices have emerged that lack clear evidence supporting their efficacy. For example, it is common clinical practice to encourage youth to challenge their thoughts about a feared situation before and during an exposure (i.e., cognitive restructuring), even though clear evidence does not exist to support this practice. Additionally, it is common for clinicians to create a "fear ladder" or "hierarchy" with patients before beginning exposures. This hierarchy typically takes the form of a rank-ordered list of exposures or feared stimuli from least to most difficult, and clinicians move up this list systematically from the easiest to most difficult items during treatment. Again, there is little clear evidence to support this practice.

More recent research on fear extinction indicates that exposure therapy does not cause threat associations to disappear but rather leads to the formation of non-threat (i.e., inhibitory) associations that compete with and weaken older threat associations. The goal of exposure therapy, according to this model, is to strengthen these non-threat associations and weaken threat associations. Research on inhibitory learning has turned many of the long-standing exposure practices discussed in the previous paragraph on their head by providing new guidelines for optimizing exposure therapy. Many of these new guidelines differ significantly from common clinical practices and are designed to maximize learning of inhibitory associations. These guidelines are as follows:

  1. Design exposures that maximally violate a patient's expectations about how bad an outcome would be or how often it will occur. In clinical practice, an exposure that maximally violates expectancies is one that is terminated not when fear habituates or reduces by a certain amount (e.g., "What is your fear rating?") but rather when the patient's expectancy of a bad outcome is significantly reduced. (e.g., "What do you think the chances are that X will happen?).
  2. Do not instruct patients to change their thinking about a feared situation before or during and exposure. The principle of maximum violation of expectancies dictates that participants should not be encouraged to use cognitive reappraisal (e.g., strategies for thinking more realistically or accurately) during an exposure, as such strategies reduce the expectation that a negative outcome will occur and thus prevent maximum violation of expectancy.
  3. Introduce variability of stimuli into exposure tasks by moving up and down a fear ladder randomly. Inhibitory learning theory suggests that clinicians should frequently vary the difficulty of exposure to stimuli to create a consistently high level of emotion, which has been associated with superior extinction learning. This guideline means that, instead of moving up a fear hierarchy or ladder in a systematic way from least to most difficult over time, and moving on to more difficult items after habituation to easier ones has occurred, clinicians should design exposures that will allow patients to achieve variable but generally high levels of fear or anxiety over the full course of an exposure.

In this study, the investigators plan to test these clinical practice guidelines derived from inhibitory learning against standard exposure practice. A few studies have empirically tested these and/or other clinical practice guidelines established based on inhibitory learning in clinical adult samples. However, no known studies have yet empirically tested the efficacy of an inhibitory learning approach to exposure therapy in youth with anxiety or other emotional disorders, nor have any known studies tested the acceptability or feasibility of such an approach. Therefore, in this study the investigators propose to conduct a small-scale, pilot randomized controlled trial (RCT) examining the feasibility, acceptability, and relative efficacy of applying an inhibitory learning approach to exposure in youth. Up to 20 youth will be randomized to one of two groups-standard exposure (SE) or exposure conducting according to inhibitory learning principles (E + IL). Given the small n for this study, the primary goal will be to assess feasibility and acceptability of an inhibitory learning approach to exposure, while establishing the efficacy of this approach relative to SE is exploratory. This study, along with planned larger-scale RCTs to follow, will help to inform clinical care guidelines for best practice of exposure therapy with anxious youth.

03

Conditions studied

  • Anxiety Disorders

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04

Who can participate

Ages eligible
7 Years to 17 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Primary or secondary diagnosis of an anxiety disorder
  2. Ability of both child and caregiver to read and understand English
  3. Ability of child and at least one caregiver to attend weekly sessions

Exclusion criteria

Exclusion Criteria:

  1. Diagnosis of autism spectrum disorder, intellectual development disorder, or limited cognitive functioning (i.e., documented Intelligence Quotient [IQ]\<80).
  2. Diagnosis of a psychotic disorder or bipolar disorder
  3. Severe and current suicidal ideation, history of suicide attempt in past six months, or frequent and persistent self-injurious behavior
  4. Diagnosis of a substance use disorder or significant, recent substance use
  5. Any youth receiving concurrent individual therapy will also be excluded from the study.
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
28 participants (actual)

Study arms

  • Active comparator
    Standard Exposure

    This arm will receive exposure therapy conducted according to standard care practices.

    Behavioral: Standard Exposure

  • Experimental
    Exposure + Inhibitory Learning

    This arm will receive exposure therapy conducted according to principles of inhibitory learning.

    Behavioral: Exposure + Inhibitory Learning

Interventions

  • BehavioralStandard Exposure

    Exposure therapy conducted according to standard clinical care practices

  • BehavioralExposure + Inhibitory Learning

    Exposure therapy conducted according to practice recommendations based derived from research on inhibitory learning theories of fear extinction

06

What researchers measure

Primary outcomes

  1. Change in Percentage of Exposure Refusals (Feasibility Measure)

    Therapists will record the percentage of exposures the patient refused to complete during the session.

    Time frame: Treatment weeks 5, 6, 7, and 8

  2. Change in Latency to Initiating Exposure (Feasibility Measure)

    Therapist will record the average amount of time the patient delayed before initiating each exposure in session

    Time frame: Treatment weeks 5, 6, 7, 8

  3. Early Treatment Termination (Feasibility Measure)

    Information will be collected regarding whether the patient terminated treatment early (before session 9)

    Time frame: Measure will be collected following the patient's termination from treatment

  4. Change in Homework Completion (Feasibility Measure)

    Therapist will record the number of exposure sessions for which the patient completed homework

    Time frame: Treatment weeks 6, 7, 8, and 9

  5. Client Satisfaction Questionnaire-8 (CSQ-8)

    8-item measure of patient satisfaction with treatment. The measure is rated on a four-point scale, with possible scores ranging from 8-32.

    Time frame: Week 9 (End of Treatment)

Secondary outcomes

  1. Change in Distress Tolerance Scale--Child (DTS-C)

    A 15-item self-report measure of difficulties managing distress and related emotions. The measure is rated on a 5-point scale, with possible scores ranging from 15 to 65. Higher scores indicate greater ability to tolerate distress.

    Time frame: Treatment Week 1, Week 5, and Week 9 (End of Treatment)

  2. Change in Child Avoidance Measure, Self and Parent Report (CAMS/P)

    The CAMS/P are 8-item child- and parent-report (respectively) measures of behavioral avoidance. The measure is rated on a 4-point scale, with possible scores ranging from 0 to 24. Higher scores indicate greater behavioral avoidance.

    Time frame: Treatment Week 1, Week 5, and Week 9 (End of Treatment)

  3. Change in Avoidance and Fusion Questionnaire--Youth (AFQ-Y)

    A 17-item self-report measure of experiential avoidance and cognitive fusion. The measure is rated on a 4-point scale, with possible scores ranging from 0 to 68. Higher scores indicate greater cognitive fusion and experiential avoidance.

    Time frame: Treatment Week 1, Week 5, and Week 9 (End of Treatment)

  4. Change in Parent Acceptance and Action Questionnaire (PAAQ)

    A 15-item measure of parent experiential avoidance, or parental actions intended to control the form and frequency of their child's emotional experiences. Items are rated on a 7-point scale, with possible scores ranging from 17 to 105. Higher scores indicate less parental experiential avoidance and less effort to control child emotional experiences.

    Time frame: Treatment Week 1, Week 5, and Week 9 (End of Treatment)

  5. Change in Screen for Child Anxiety Related Disorders (SCARED), Self and Parent Report

    A 41-item child- and parent-report measure assessing symptoms of anxiety in youth ages 7 to 19. Items are rated on a 3-point scale, with scores ranging from 0 to 82. Higher scores indicate greater anxiety symptoms.

    Time frame: Treatment Week 1, Week 5, Week 6, Week 7, Week 8, and Week 9 (End of Treatment)

07

Study locations

1 site
  • Children's Hospital Colorado
    Aurora, Colorado 80045, United States
08

References and documents

Publications

  • Arch, J. J., & Abramowitz, J. S. (2015). Exposure therapy for obsessive-compulsive disorder: An optimizing inhibitory learning approach. Journal of Obsessive-Compulsive and Related Disorders, 6, 174-182.
  • Birmaher B, Khetarpal S, Brent D, Cully M, Balach L, Kaufman J, Neer SM. The Screen for Child Anxiety Related Emotional Disorders (SCARED): scale construction and psychometric characteristics. J Am Acad Child Adolesc Psychiatry. 1997 Apr;36(4):545-53. doi: 10.1097/00004583-199704000-00018. PubMed 9100430 ↗
  • Cheron DM, Ehrenreich JT, Pincus DB. Assessment of parental experiential avoidance in a clinical sample of children with anxiety disorders. Child Psychiatry Hum Dev. 2009 Sep;40(3):383-403. doi: 10.1007/s10578-009-0135-z. Epub 2009 Mar 12. PubMed 19280337 ↗
  • Craske MG, Kircanski K, Zelikowsky M, Mystkowski J, Chowdhury N, Baker A. Optimizing inhibitory learning during exposure therapy. Behav Res Ther. 2008 Jan;46(1):5-27. doi: 10.1016/j.brat.2007.10.003. Epub 2007 Oct 7. PubMed 18005936 ↗
  • Craske MG, Treanor M, Conway CC, Zbozinek T, Vervliet B. Maximizing exposure therapy: an inhibitory learning approach. Behav Res Ther. 2014 Jul;58:10-23. doi: 10.1016/j.brat.2014.04.006. Epub 2014 May 9. PubMed 24864005 ↗
  • Deacon B, Kemp JJ, Dixon LJ, Sy JT, Farrell NR, Zhang AR. Maximizing the efficacy of interoceptive exposure by optimizing inhibitory learning: a randomized controlled trial. Behav Res Ther. 2013 Sep;51(9):588-96. doi: 10.1016/j.brat.2013.06.006. Epub 2013 Jul 6. PubMed 23872701 ↗
  • Ehrenreich-May, J., Kennedy, S. M., Sherman, J., Bilek, E. L., Buzzella, B., Bennett, S., & Barlow, D. H. (In press). Unified protocols for transdiagnostic treatment of emotional disorders in children and adolescents. New York: Oxford University Press.
  • Foa EB, Kozak MJ. Emotional processing of fear: exposure to corrective information. Psychol Bull. 1986 Jan;99(1):20-35. No abstract available. PubMed 2871574 ↗
  • Greco LA, Lambert W, Baer RA. Psychological inflexibility in childhood and adolescence: development and evaluation of the Avoidance and Fusion Questionnaire for Youth. Psychol Assess. 2008 Jun;20(2):93-102. doi: 10.1037/1040-3590.20.2.93. PubMed 18557686 ↗
  • Higa-McMillan CK, Francis SE, Rith-Najarian L, Chorpita BF. Evidence Base Update: 50 Years of Research on Treatment for Child and Adolescent Anxiety. J Clin Child Adolesc Psychol. 2016;45(2):91-113. doi: 10.1080/15374416.2015.1046177. Epub 2015 Jun 18. PubMed 26087438 ↗
  • Larsen DL, Attkisson CC, Hargreaves WA, Nguyen TD. Assessment of client/patient satisfaction: development of a general scale. Eval Program Plann. 1979;2(3):197-207. doi: 10.1016/0149-7189(79)90094-6. No abstract available. PubMed 10245370 ↗
  • Milad MR, Pitman RK, Ellis CB, Gold AL, Shin LM, Lasko NB, Zeidan MA, Handwerger K, Orr SP, Rauch SL. Neurobiological basis of failure to recall extinction memory in posttraumatic stress disorder. Biol Psychiatry. 2009 Dec 15;66(12):1075-82. doi: 10.1016/j.biopsych.2009.06.026. Epub 2009 Sep 12. PubMed 19748076 ↗
  • Muris, P., Merckelbach, H., van Brakel, A., Mayer, B., & van Dongen, L. (1998). The Screen for Child Anxiety Related Emotional Disorders (SCARED): Relationship with anxiety and depression in normal children. Personality and Individual Differences, 24(4), 451-456.
  • Shin LM, Liberzon I. The neurocircuitry of fear, stress, and anxiety disorders. Neuropsychopharmacology. 2010 Jan;35(1):169-91. doi: 10.1038/npp.2009.83. PubMed 19625997 ↗
  • Simons, J. S., & Gaher, R. M. (2005). The Distress Tolerance Scale: Development and validation of a self-report measure. Motivation and Emotion, 29(2), 83-102.
  • Whiteside SP, Ale CM, Young B, Dammann JE, Tiede MS, Biggs BK. The feasibility of improving CBT for childhood anxiety disorders through a dismantling study. Behav Res Ther. 2015 Oct;73:83-9. doi: 10.1016/j.brat.2015.07.011. Epub 2015 Jul 29. PubMed 26275761 ↗
  • Whiteside SP, Gryczkowski M, Ale CM, Brown-Jacobsen AM, McCarthy DM. Development of child- and parent-report measures of behavioral avoidance related to childhood anxiety disorders. Behav Ther. 2013 Jun;44(2):325-37. doi: 10.1016/j.beth.2013.02.006. Epub 2013 Mar 4. PubMed 23611081 ↗

Individual participant data

Plan to share: Undecided

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jan 2018 to primary completion in Dec 2020, 34 months.

Of 3,841 non-industry interventional studies with no phase under Anxiety Disorders, half reached primary completion within 12 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 28. This study's 34 months is above that.

Counting every sponsor, half of 3,943 studies reached it within 12 months; a quarter within 5 and three quarters within 28.

How these figures are worked out, and which studies are left out of them.

Registered
Nov 28, 2017
First posted
Dec 14, 2017
StartActual
Jan 31, 2018
Primary completionActual
Dec 1, 2020
CompletionActual
Dec 1, 2020
Last update
Dec 17, 2020
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 17, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03372915
Responsible party
Sponsor
First posted
Dec 14, 2017
Start date
Jan 31, 2018
Primary completion
Dec 1, 2020
Completion
Dec 1, 2020
Last update
Dec 17, 2020

Study contacts

Jessica Hawks, PhD
principal investigator · University of Colorado, Denver

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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