Trial · NCT04218383
Transcranial Direct Current Stimulation for Impulsivity and Food-related Impulsivity in Obesity
NCT04218383, Not applicable, Suspended, University of Calgary
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. Transcranial Direct Current Stimulation for Impulsivity and Food-related Impulsivity in Obesity. Trials, record NCT04218383. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT04218383
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- Transcranial Direct Current Stimulation for Impulsivity and Food-related Impulsivity in Obesity
- NCT number
- NCT04218383
- Status
- Suspended
- Phases
- Not applicable
- Enrollment
- 30 participants, estimated
- Lead sponsor
- University of Calgary
- Conditions
- Impulsive Behavior
- Interventions
- Transcranial Direct Current Stimulation
- First posted
- 2020-01-06
- Last updated
- 2021-01-15
Source ClinicalTrials.gov
Registered outcomes6
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Probabilistic Decision Making | Before and after a 20-minute tDCS session | Net score of the Iowa Gambling Task The net score ranges from -20 to 30. Higher values represent a better outcome (i.e., enhanced decision-making) |
| Secondary | Cognitive Control | Before and after a 20-minute tDCS session | Interference index in the Stroop Color-word Task. Interference index is the reaction time computed between the presentation of the stimulus and the response of the participant. It typically ranges from 0 to 300 millisecond, with smaller values of reaction time indicate better outcome (i.e., better cognitive control). |
| Secondary | Food-specific cognitive control | Before and after a 20-minute tDCS session | The interference index in the Food-Stroop Color-Word test. Interference index is the reaction time computed between the presentation of the stimulus and the response of the participant. It typically ranges from 0 to 300 millisecond, with smaller values of reaction time indicate better outcome (i.e., better Food-specific cognitive control). |
| Secondary | Delayed discounting | Before and after a 20-minute tDCS session | The discount rate for delayed monetary rewards. This rate is quantified by the hyperbolic discounting function using the following equation: V = A/(1+kD), where A presents the value of the delayed reward A at delay D, and k is a free parameter that determines the discount rate, with higher values of k indicate worse outcome (i.e., greater discounting of rewards as a function of time). |
| Secondary | Motor impulsivity | Before and after a 20-minute tDCS session. | The stop-signal reaction time in the Stop-Signal Task. The stop signal reaction time ranges from 50 to 250, where greater values represent worse outcome (i.e, increased motor impulsivity). |
| Secondary | Moderation of effect by self-reported measures of impulsivity and dysregulated eating | Before and after a 20-minute tDCS session. | Individuals with high levels of impulsivity, impulsive eating, binge eating, self-reported food addiction will show greater moderation by tDCS on our primary and secondary outcomes. Barrat's impulsiveness scale-11 with a range of scores from 0 to 120, with higher scores indicating greater impulsivity. Reward-based eating drive scale-13 with a range of scores from 0 to 54, with higher scores indicating greater uncontrolled eating. Binge eating scale with a range of scores from 0 to 46: minimal binge eating ( \>17), moderate binge eating (18-26), and severe binge eating (\<27)). Yale Food Addiction Scale with a range of symptom severity from 0 to 7: mild (2-3 symptoms), moderate (4-5 symptoms), severe (6 or more symptoms)). |
Source ClinicalTrials.gov
Outcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers16
The papers the trial lists on ClinicalTrials.gov.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests3
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
| Test | Named as | Source |
|---|---|---|
| Iowa Gambling Lite | Primary outcome | ConductCognition |
| Stop-Signal Task | Secondary outcome | ConductCognition |
| Stroop Color-Word Test | Secondary outcome | ConductCognition |
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT04218383
GET https://conductscience.org/api/trials/v1/NCT04218383/registered