- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03599115
Effects of Inhibitory Control Training in Eating Behaviors (N2ICT)
July 7, 2020 updated by: Kaylie Carbine, Brigham Young University
The Effects of Food-Specific Inhibitory Control Training on Weight, Diet, and Neural Indices in Overweight and Obese Adults
Overweight and obese individuals will be randomly assigned to a food-specific or generic inhibitory control training.
Food intake, weight, and neural indices of inhibitory control will be assessed prior, immediately after the 4-week intervention, and 12-weeks after intervention completion to assess the effectiveness of a mobile inhibitory control training intervention over time for health outcomes.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
All participants will report to the lab for a baseline session, where their weight, average food intake for three days (using the Automated Self-Administer 24-hour Dietary Recall [ASA24] system), neural indices of inhibitory control (as assessed by the N2 event-related potential component during a food and genetic go/no-go task), appetitive drive toward food (as measured by the Power of Food Scale) and basic demographic information will be assessed.
Based off their gender and baseline levels of inhibitory control (indicated by the N2), participants will be assigned to a four week food-specific inhibitory control training or a generic inhibitory control training.
Trainings are administered on a mobile device via an app and participants select four our of five business days to complete the trainings on.
Immediately after the four weeks, participants will come in for a follow-up session where their weight, food intake, N2, and appetitive drive to food will be assessed again.
Finally, participants will have a 12-week waiting period where they do not complete the trainings.
After the 12 weeks, they will come in for a final lab visit where their weight, food intake, N2, and appetitive drive to food will be assessed one last time.
Study Type
Interventional
Enrollment (Actual)
105
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
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Utah
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Provo, Utah, United States, 84602
- Brigham Young University
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-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 45 years (ADULT)
Accepts Healthy Volunteers
Yes
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Overweight or Obese (BMI > 25 kg/m2)
Exclusion Criteria:
- Diagnosis of a psychological disorder (e.g., major depressive disorder, general anxiety disorder), neurological disorder (e.g., epilepsy, stroke), learning disability, or eating disorder (e.g., anorexia nervosa, bulimia nervosa, binge eating disorder)
- Metabolic/chronic disease (e.g., cardiovascular disease, Type II diabetes)
- Pregnant or lactating
- Current participation in a weight loss diet
- Food allergies
- Head injury that resulted in a loss of consciousness
- Avid exercisers (i.e., participate in at least 20 minutes of vigorous physical activity more than three times a week)
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: TREATMENT
- Allocation: RANDOMIZED
- Interventional Model: PARALLEL
- Masking: DOUBLE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
EXPERIMENTAL: Inhibitory Control Training to Food Items
Participants complete a 10 minute training task once a day, 4 days a week, for 4 weeks.
Task is administered using a mobile app (Paradigm mobile) that is installed on an iPhone or iPad.
Participants receive an instruction text/email at 9am on their chosen weekdays with instructions on what task to complete and a reminder text/email at 5pm if the task has not yet been completed.
Research team receives an email when the task has been completed.
When the task is administered, participants see a picture for 1250ms with an inter-stimulus interval of 1250ms and have to indicate which side of the screen the picture appears (go trials).
Participants are instructed to not make a response when the picture is surrounded by a black box (no-go trials).
There are 6 blocks with 36 trials each, half being go and half being no-go trials.
High-calorie foods are always no-go trials and low-calorie foods are always go trials.
|
Computerized go/no-go task where individuals make responses to certain items (go trials) and withhold responses from certain items (no-go trials, in this case, trials surrounded by a black box).
Intervention is designed to target and improve inhibitory control cognitive mechanisms in general (generic arm) or towards high-calorie foods specifically (food arm).
|
ACTIVE_COMPARATOR: Inhibitory Control Training to Neutral Items
Participants complete a 10 minute training task once a day, 4 days a week, for 4 weeks.
Task is administered using a mobile app (Paradigm mobile) that is installed on an iPhone or iPad.
Participants receive an instruction text/email at 9am on their chosen weekdays with instructions on what task to complete and a reminder text/email at 5pm if the task has not yet been completed.
Research team receives an email when the task has been completed.
When the task is administered, participants see a picture for 1250ms with an inter-stimulus interval of 1250ms and have to indicate which side of the screen the picture appears (go trials).
Participants are instructed to not make a response when the picture is surrounded by a black box (no-go trials).
There are 6 blocks with 36 trials each, half being go and half being no-go trials.
All pictures are of household items.
|
Computerized go/no-go task where individuals make responses to certain items (go trials) and withhold responses from certain items (no-go trials, in this case, trials surrounded by a black box).
Intervention is designed to target and improve inhibitory control cognitive mechanisms in general (generic arm) or towards high-calorie foods specifically (food arm).
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Caloric Intake
Time Frame: Three days will be completed at baseline, immediately after the intervention, and at the 12 week follow-up visit (total of 9 recalls)
|
Using the Automated Self-Administered 24-hour Dietary Recall (ASA24), participants will record their food intake for two weekdays and one weekend, two of which will be randomly assigned and one which will be the day they report to their lab visit.
Caloric intake, as quantified by ASA24, will be averaged for the three days and statistically analyzed to see if average caloric intake changes over time due to the inhibitory control training arm.
|
Three days will be completed at baseline, immediately after the intervention, and at the 12 week follow-up visit (total of 9 recalls)
|
Weight
Time Frame: Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
|
Weight will be measured in kilograms using a stadiometer to see if weight changes over the course of the study.
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Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
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N2 Event-Related Potential Component
Time Frame: Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
|
The N2 is a negative deflection in the event-related potential waveform occurring 200 to 300 ms after the onset of a stimulus and is larger (i.e., more negative) when an individual has to withhold a dominant response.
It is a neural reflection of inhibitory control.
The investigators will assess if the N2 amplitude gets larger as a result of inhibitory control training (as individuals will be better at recruiting inhibitory control resources).
The investigators will also see if the N2 predicts who is successful at losing weight and reducing caloric intake after the intervention, to better understand the mechanism of action for inhibitory control training.
|
Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
No-Go Accuracy
Time Frame: Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
|
Percent of correct no-go trials during the laboratory go/no-go tasks.
The investigators are interested if this improves due to the intervention.
|
Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
|
Correct Go Reaction Times
Time Frame: Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
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Time in ms to correctly respond to a go trial during the laboratory tasks.
The investigators are interested if reaction times get faster due to the intervention.
|
Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Power of Food Scale (PFS)
Time Frame: Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
|
The PFS assesses thoughts, feelings, and motivations to consume palatable food.
It provides a measure of the appetitive drive individuals have to consume food.
There are 15 items on the PFS, each ranging from 1 (don't agree at all) to 5 (strongly agree).
The PFS is divided into 3 subscales that assess appetitive drive in 3 different environmental situations: when food is available (6 items), when food is physically present (4 items), and when food has been tasted (5 items).
Subtotal scores are calculated by taking the mean of all the individual items in each subscale (subscale scores ranging from 1 to 5).
An overall score, which is calculated by averaging the three subscale scores, will be used as the outcome of interest (overall score ranging from 1 to 5).
A higher overall score on the PFS indicates there is a higher appetitive drive to consume food.
The investigators will test if the appetitive drive to consume food changes over time due to the intervention.
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Assessed at baseline, immediately after the intervention, and at the 12-week follow-up visit.
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Helpful Links
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (ACTUAL)
September 26, 2017
Primary Completion (ACTUAL)
March 1, 2020
Study Completion (ACTUAL)
May 1, 2020
Study Registration Dates
First Submitted
June 25, 2018
First Submitted That Met QC Criteria
July 23, 2018
First Posted (ACTUAL)
July 26, 2018
Study Record Updates
Last Update Posted (ACTUAL)
July 8, 2020
Last Update Submitted That Met QC Criteria
July 7, 2020
Last Verified
July 1, 2020
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- X17021
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
YES
IPD Plan Description
Study protocol, materials, and analysis plans are already posted on the Open Science Framework (https://osf.io/szxua/).
Actual study data (de-identified) will be made available, along with analysis codes, once the study has been complete and published.
IPD Sharing Time Frame
Once data collection and data analysis has been completed and published in a scientific journal, the study data (de-identified) will either be posted on an open science website, such as the Open Science Framework, or will be given to other researchers upon request.
IPD Sharing Supporting Information Type
- STUDY_PROTOCOL
- SAP
- ICF
- ANALYTIC_CODE
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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