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OverweightNCT04178486

Changing Eating Behaviors of Healthy Adults Through Hypnosis

A study testing Hypnosis with amnesia suggestions, Hypnosis with cognitive rehearsal suggestions and Hypnosis with memory substitution suggestions in people with Overweight and Obesity, run by Babes-Bolyai University at 1 site in Romania.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

There is a lot of research on weight loss. In spite of the research on the subject, obesity is a growing disease all through the world. The results of recent reviews and meta-analyzes show that psychological interventions had small effect on weight loss. Read more about this study

Who is it for?
Ages 18 years and olderHealthy volunteers can take part
Conditions the study is for
Overweight, Obesity
What is being tested?
Hypnosis with amnesia suggestions, Hypnosis with cognitive rehearsal suggestions and Hypnosis with memory substitution suggestions
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
89 participants
Where
1 siteRomania
Study dates
20 May 2019to 17 Sep 2019
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Both gender Healthy Adults who want to change their eating behavior

Who cannot join

  • Severe mental illness <18 years A diagnosed eating disorder

Trial locations and contacts

1 site in 1 country.

Romania1 site

  • Department of Clinical Psychology and Psychotherapy

    Cluj-Napoca, Cluj, 400015

Other trials in Romania

About this study

Official title: Eating Behavior - Choice or Reconstruction of Past Experience? Changing Eating Behaviors of Healthy Adults Through Hypnotic Suggestions

There is a lot of research on weight loss. In spite of the research on the subject, obesity is a growing disease all through the world. The results of recent reviews and meta-analyzes show that psychological interventions had small effect on weight loss. The investigators propose a different approach to changing eating behaviors with relevance to weight management and hypothesize that participants in the active interventions will significantly improve their eating behaviors than the ones in the control group. The results will improve the psychological interventions for weight loss.

Read the detailed description

This is a randomized clinical trial consisting of four groups. According to the concept of Free Will, the decision of action is taken before being acknowledged and is made following the reconstruction of previous experiences. It can be inhibited immediately (max 100ms) after awareness. The investigators want to intervene based on this model using hypnotic suggestions to change eating behaviors. Participants were found through social media announcements. Three groups receive one session of hypnosis with induction and different suggestions and the control group receives only induction. The eating behavior is measured through computer tasks in which participants have the option to choose pictures of food. The task is performed before, during and after hypnosis and the measurements of eating behavior are taken at all three times.

Conditions
Overweight, Obesity
Being tested
Hypnosis with amnesia suggestions, Hypnosis with cognitive rehearsal suggestions, Hypnosis with memory substitution suggestions, Hypnosis with induction only
Keywords
Overweight, Obesity, Weight loss, Hypnosis, Eating Behavior, Free Will
Medical subject headings
Overweight, Obesity, Weight Loss, Feeding Behavior

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Hypnosis with amnesia suggestionsBehavioural

    Participants received hypnotic induction with hypnotic suggestions for their eating behaviors.

  • Hypnosis with cognitive rehearsal suggestionsBehavioural

    Participants received hypnotic induction with hypnotic suggestions for their eating behaviors.

  • Hypnosis with memory substitution suggestionsBehavioural

    Participants received hypnotic induction with hypnotic suggestions for their eating behaviors.

  • Hypnosis with induction onlyBehavioural

    Participants received only hypnotic induction.

Study groups in NCT04178486
Study groupRoleWhat they receive
AmnesiaExperimentalHypnosis formed from hypnotic induction (an adapted version from Barber Suggestibility Scale) together with hypnotic suggestions to experience amnesia for the food pictures they had just seen.
Receives: Behavioral: Hypnosis with amnesia suggestions
Cognitive RehearsalExperimentalHypnosis formed from hypnotic induction (an adapted version from Barber Suggestibility Scale) together with hypnotic suggestions about a future where they will control their eating behaviors.
Receives: Behavioral: Hypnosis with cognitive rehearsal suggestions
Memory SubstitutionExperimentalHypnosis formed from hypnotic induction (an adapted version from Barber Suggestibility Scale) together with hypnotic suggestions about a past where they have always controlled their eating behaviors.
Receives: Behavioral: Hypnosis with memory substitution suggestions
ControlPlacebo comparatorHypnosis formed from only hypnotic induction (an adapted version from Barber Suggestibility Scale).
Receives: Behavioral: Hypnosis with induction only

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in Eating Behavior

    The number of food pictures chosen by the participant in this single session intervention. The outcome is a measure assessing a change between three time points.

    Measured: The intervention is delivered in one session. The outcome is measured: immediately pre intervention (0-2 min), during intervention and immediately post intervention (0-2 min).

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted26 Nov 2019
  2. Study start20 May 2019
  3. Primary completion17 Sep 2019
  4. Study completion17 Sep 2019

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Model description
Participants were randomized in one of the four groups.
Masking
Single blind
Who is masked
Participant
Enrolment
89 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04178486
Sponsor's protocol ID
Phd Study
Status last verified
Nov 2019
First submitted
27 Oct 2019
Last updated
26 Nov 2019
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Publications

  • Haggard P, Cartledge P, Dafydd M, Oakley DA. Anomalous control: when 'free-will' is not conscious. Conscious Cogn. 2004 Sep;13(3):646-54. doi: 10.1016/j.concog.2004.06.001.

    PubMed 15336254

  • Jamieson GA, Kittenis MD, Tivadar RI, Evans ID. Inhibition of retrieval in hypnotic amnesia: dissociation by upper-alpha gating. Neurosci Conscious. 2017 Apr 19;2017(1):nix005. doi: 10.1093/nc/nix005. eCollection 2017.

    PubMed 30042839

  • Gravitz, Melvin A.

  • Oakley DA, Halligan PW. Hypnotic suggestion and cognitive neuroscience. Trends Cogn Sci. 2009 Jun;13(6):264-70. doi: 10.1016/j.tics.2009.03.004. Epub 2009 May 8.

    PubMed 19428287

  • Obhi, Sukhvinder S., and Patrick Haggard.

  • Kuhn S, Haggard P, Brass M. Intentional inhibition: how the "veto-area" exerts control. Hum Brain Mapp. 2009 Sep;30(9):2834-43. doi: 10.1002/hbm.20711.

    PubMed 19072994

  • Wolpert DM, Ghahramani Z, Jordan MI. An internal model for sensorimotor integration. Science. 1995 Sep 29;269(5232):1880-2. doi: 10.1126/science.7569931.

    PubMed 7569931

  • Haggard P. Human volition: towards a neuroscience of will. Nat Rev Neurosci. 2008 Dec;9(12):934-46. doi: 10.1038/nrn2497.

    PubMed 19020512

  • Libet, Benjamin.

  • Terhune DB, Brugger P. Doing better by getting worse: posthypnotic amnesia improves random number generation. PLoS One. 2011;6(12):e29206. doi: 10.1371/journal.pone.0029206. Epub 2011 Dec 15.

    PubMed 22195022

  • Mendelsohn A, Chalamish Y, Solomonovich A, Dudai Y. Mesmerizing memories: brain substrates of episodic memory suppression in posthypnotic amnesia. Neuron. 2008 Jan 10;57(1):159-70. doi: 10.1016/j.neuron.2007.11.022.

    PubMed 18184572

  • Oakley DA, Halligan PW. Hypnotic suggestion: opportunities for cognitive neuroscience. Nat Rev Neurosci. 2013 Aug;14(8):565-76. doi: 10.1038/nrn3538. Epub 2013 Jul 17.

    PubMed 23860312

  • Stoeckel LE, Weller RE, Cook EW 3rd, Twieg DB, Knowlton RC, Cox JE. Widespread reward-system activation in obese women in response to pictures of high-calorie foods. Neuroimage. 2008 Jun;41(2):636-47. doi: 10.1016/j.neuroimage.2008.02.031. Epub 2008 Mar 4.

    PubMed 18413289

Questions about this trial

What is this clinical trial studying?

A study testing Hypnosis with amnesia suggestions, Hypnosis with cognitive rehearsal suggestions and Hypnosis with memory substitution suggestions in people with Overweight and Obesity, run by Babes-Bolyai University at 1 site in Romania.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 26 Nov 2019. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Romania. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Eating Behavior (time frame: The intervention is delivered in one session. The outcome is measured: immediately pre intervention (0-2 min), during intervention and immediately post intervention (0-2 min).). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04178486, which also lists 13 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Nov 2019.

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