Neuropsychological Rehabilitation of Spontaneous Confabulation: a Replica Study

NCT ID: NCT03183453

Last Updated: 2018-05-29

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

57 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-07-31

Study Completion Date

2018-01-31

Brief Summary

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Confabulators consistently generate false memories without intention to deceive and with great feeling of rightness. However, there is currently no known effective treatment for them. In order to fill this gap, we performed a neuropsychological treatment in two groups of confabulators: experimental vs. control (ClinicalTrials.gov ID: NCT02540772).

Now, we intend to replicate the treatment with a larger sample of confabulators and with other two control groups: non-confabulator patients with brain injury and healthy individuals

Detailed Description

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The treatment consisted of some brief material that patients had to learn and recall at both immediate and delayed moments. After both recollections, patients were given feedback about their performance (errors and correct responses). Pre-treatment and post-treatment measurements were administered.

Non-confabulator patients and healthy participants performed only the pre-treatment measurement.

Conditions

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Memory Disorders

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Participants

Study Groups

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Neuropsychological treatment

The tested treatment is a combination of neuropsychological rehabilitation procedures: learning, episodic memory recall after a delay, selective attention, inhibition of predominant responses and awareness of deficits.

Group Type EXPERIMENTAL

Neuropsychological treatment

Intervention Type BEHAVIORAL

Participants had to learn some brief material (words, faces, pictures, news), after which they were asked for an immediate and a delayed recall. After both recalls, participants were confronted with feedback about correct responses, non-responses and errors (i.e., confabulations and errors of attribution). This type of feedback worked on: 1) selective attention during the learning phase, training patients to focus on the relevant details of the stimuli; 2) monitoring processes during the retrieval phase, reinforcing the strategic search and training patients to inhibit traces that were irrelevant; and 3) memory control processes after the retrieval phase. The treatment consisted of 9 sessions and lasted for 3 weeks and the participants performed a baseline before and after treatment.

Non-confabulators control group

Non-confabulators (brain injured patients but without confabulations) in this control group only performed the pre- and post-measurements without treatment.

Group Type NO_INTERVENTION

No interventions assigned to this group

Healthy control group

Healthy participants in this control group only performed the pre- and post-measurements without treatment.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Neuropsychological treatment

Participants had to learn some brief material (words, faces, pictures, news), after which they were asked for an immediate and a delayed recall. After both recalls, participants were confronted with feedback about correct responses, non-responses and errors (i.e., confabulations and errors of attribution). This type of feedback worked on: 1) selective attention during the learning phase, training patients to focus on the relevant details of the stimuli; 2) monitoring processes during the retrieval phase, reinforcing the strategic search and training patients to inhibit traces that were irrelevant; and 3) memory control processes after the retrieval phase. The treatment consisted of 9 sessions and lasted for 3 weeks and the participants performed a baseline before and after treatment.

Intervention Type BEHAVIORAL

Other Intervention Names

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Confabulations treatment

Eligibility Criteria

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Inclusion Criteria

* The presence of spontaneous confabulations after acute brain injury, for at least three months and without clinical improvement (interfering with the patient's daily life with frequent arguments and exhaustive supervision).
* The presence of momentary confabulations in the Spanish adaptation of Dalla Barba provoked confabulation interview.
* Prior to injury, all patients should be completely independent for daily living.

Exclusion Criteria

* The presence of impairment in alertness.
* Dementia.
* Acute confusional state.
* A history of drug abuse.
* Psychiatric antecedents.
Minimum Eligible Age

35 Years

Maximum Eligible Age

80 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Monica Triviño Mosquera

OTHER

Sponsor Role lead

Responsible Party

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Monica Triviño Mosquera

Psychology PhD

Responsibility Role SPONSOR_INVESTIGATOR

Principal Investigators

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Monica Triviño, PhD

Role: PRINCIPAL_INVESTIGATOR

San Rafael University Hospital

Locations

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San Rafael University Hospital

Granada, , Spain

Site Status

Countries

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Spain

References

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Gilboa A, Alain C, Stuss DT, Melo B, Miller S, Moscovitch M. Mechanisms of spontaneous confabulations: a strategic retrieval account. Brain. 2006 Jun;129(Pt 6):1399-414. doi: 10.1093/brain/awl093. Epub 2006 Apr 25.

Reference Type BACKGROUND
PMID: 16638795 (View on PubMed)

Trivino M, Rodenas E, Lupianez J, Arnedo M. Effectiveness of a neuropsychological treatment for confabulations after brain injury: A clinical trial with theoretical implications. PLoS One. 2017 Mar 3;12(3):e0173166. doi: 10.1371/journal.pone.0173166. eCollection 2017.

Reference Type BACKGROUND
PMID: 28257420 (View on PubMed)

Schnider A. The confabulating mind. How the brain creates reality. Oxford: Oxford University Press; 2008

Reference Type BACKGROUND

Nahum L, Bouzerda-Wahlen A, Guggisberg A, Ptak R, Schnider A. Forms of confabulation: dissociations and associations. Neuropsychologia. 2012 Aug;50(10):2524-34. doi: 10.1016/j.neuropsychologia.2012.06.026. Epub 2012 Jul 7.

Reference Type BACKGROUND
PMID: 22781813 (View on PubMed)

Ciaramelli E, Ghetti S, Borsotti M. Divided attention during retrieval suppresses false recognition in confabulation. Cortex. 2009 Feb;45(2):141-53. doi: 10.1016/j.cortex.2007.10.006. Epub 2008 Feb 6.

Reference Type BACKGROUND
PMID: 19150516 (View on PubMed)

Other Identifiers

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Conf-02

Identifier Type: -

Identifier Source: org_study_id

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