Changing Eating Behaviors of Healthy Adults Through Hypnosis

NCT ID: NCT04178486

Last Updated: 2019-11-26

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

89 participants

Study Classification

INTERVENTIONAL

Study Start Date

2019-05-20

Study Completion Date

2019-09-17

Brief Summary

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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.

Detailed Description

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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

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Overweight Obesity

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Participants were randomized in one of the four groups.
Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants
The participants were not informed in which group they are.

Study Groups

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Amnesia

Hypnosis 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.

Group Type EXPERIMENTAL

Hypnosis with amnesia suggestions

Intervention Type BEHAVIORAL

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

Cognitive Rehearsal

Hypnosis 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.

Group Type EXPERIMENTAL

Hypnosis with cognitive rehearsal suggestions

Intervention Type BEHAVIORAL

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

Memory Substitution

Hypnosis 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.

Group Type EXPERIMENTAL

Hypnosis with memory substitution suggestions

Intervention Type BEHAVIORAL

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

Control

Hypnosis formed from only hypnotic induction (an adapted version from Barber Suggestibility Scale).

Group Type PLACEBO_COMPARATOR

Hypnosis with induction only

Intervention Type BEHAVIORAL

Participants received only hypnotic induction.

Interventions

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Hypnosis with amnesia suggestions

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

Intervention Type BEHAVIORAL

Hypnosis with cognitive rehearsal suggestions

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

Intervention Type BEHAVIORAL

Hypnosis with memory substitution suggestions

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

Intervention Type BEHAVIORAL

Hypnosis with induction only

Participants received only hypnotic induction.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

Both gender Healthy Adults who want to change their eating behavior

Exclusion Criteria

Severe mental illness \<18 years A diagnosed eating disorder
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Babes-Bolyai University

OTHER

Sponsor Role lead

Responsible Party

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Comsa Loana

Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Loana T Comsa, Phd Student

Role: PRINCIPAL_INVESTIGATOR

Babes Bolyay University

Locations

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Department of Clinical Psychology and Psychotherapy

Cluj-Napoca, Cluj, Romania

Site Status

Countries

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Romania

References

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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.

Reference Type BACKGROUND
PMID: 15336254 (View on PubMed)

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.

Reference Type BACKGROUND
PMID: 30042839 (View on PubMed)

Gravitz, Melvin A.

Reference Type BACKGROUND

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.

Reference Type BACKGROUND
PMID: 19428287 (View on PubMed)

Obhi, Sukhvinder S., and Patrick Haggard.

Reference Type BACKGROUND

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.

Reference Type BACKGROUND
PMID: 19072994 (View on PubMed)

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.

Reference Type BACKGROUND
PMID: 7569931 (View on PubMed)

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

Reference Type BACKGROUND
PMID: 19020512 (View on PubMed)

Libet, Benjamin.

Reference Type BACKGROUND

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.

Reference Type BACKGROUND
PMID: 22195022 (View on PubMed)

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.

Reference Type BACKGROUND
PMID: 18184572 (View on PubMed)

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.

Reference Type BACKGROUND
PMID: 23860312 (View on PubMed)

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.

Reference Type BACKGROUND
PMID: 18413289 (View on PubMed)

Other Identifiers

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Phd Study

Identifier Type: -

Identifier Source: org_study_id

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