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Can we Forget? Directed Forgetting and Embodied Cognition in Schizophrenia

22 maart 2016 bijgewerkt door: Centre Hospitalier Universitaire de Saint Etienne
Based on the theory of embodied cognition, which focuses on the influence of sensory and motor processes on cognition, researchers propose to study the influence of the action on memorization and inhibition in patients suffering from schizophrenia, using a directed forgetting paradigm. The directed forgetting paradigm is used, composed of two lists of action verbs. The instruction "to forget" is given at the end of learning the first list (To Be Forgotten (TBF)), following a simulation of a computer bug. Therefore a second list is presented to be learned and remembered (To Be Remembered (TBR)). A recognition task is performed at the end. The action verbs had to be encoded using four conditions: action performed, mimed, imagined action, action with a contextual word, reading the action verb only. 48 schizophrenic patients were included in this study. Patients were randomized to have 10 participants per condition. 48 controls matched by age, gender, laterality and education are also included and randomized in the same modality. This study aims to show that the encoding of sensory-motor components, more than providing a context could improve the inhibitory capacities but also memory in schizophrenia, and possibly be used in remediation cognitive.

Studie Overzicht

Toestand

Voltooid

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Researchers used the directed forgetting paradigm composed of two lists of action verbs. The instruction "to forget" is given at the end of learning the first list (To Be Forgotten (TBF)), following a simulation of a computer bug. Therefore a second list is presented to be learned and remembered (To Be Remembered (TBR)). A recognition task is performed at the end. The action verbs had to be encoded using four conditions: action performed, mimed, imagined action, action with a contextual word, reading the action verb only. 48 schizophrenic patients were included in this study. Patients were randomized to have 10 participants per condition. 48 controls matched by age, gender, laterality and education are also included and randomized in the same modality. This study aims to show that the encoding of sensory-motor components, more than providing a context could improve the inhibitory capacities but also memory in schizophrenia, and possibly be used in remediation cognitive.

Studietype

Ingrijpend

Inschrijving (Werkelijk)

96

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

  • Frankrijk
      • Saint Etienne, Frankrijk, 42000
        • CHU de Saint-Étienne

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar tot 50 jaar (Volwassen)

Accepteert gezonde vrijwilligers

Ja

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria for patients:

  • Schizophrenic patients as defined in Diagnostic and Statistical Manual of Mental Disorders IV (DSM-IV)
  • Stabilized a therapeutic point of view for at least one month.
  • Consent form signed
  • Affiliated to a Security Health Program

Inclusion Criteria for volunteers:

  • Consent form signed
  • Affiliated to a Security Health Program

Exclusion Criteria for patients and volunteers :

  • Not having a history of head trauma, neurological disease or not stabilized serious somatic illness,
  • Not to use psychoactive substance, as defined by the DSM IV.
  • The Intelligence Quotient must not be less than 70 (Progressive Matrices Standard score (PM38), Raven Progressive Matrix).

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Patients group 1
Memorization of the verbs by miming the action
Ander: Memorization of the verbs by miming the action
The participant reads aloud the verbs that appear on the screen, by performing the corresponding action verb.
Experimenteel: Patients group 2
Memorization of the verbs by imagining the action
Ander: Memorization of the verbs by imagining the action
The participant reads aloud the verbs that appear on the screen, by imagining the corresponding action verb.
Experimenteel: Patients group 3
Memorization of the action verbs by means of another word
Ander: Memorization of the action verbs by means of another word
The participant reads aloud the verbs that appear on the screen. Then, he reads, without memorizing it, a word associated with the action verb to be learnt to favor the memorization of that one. The word is written near the action verb.
Experimenteel: Patients group 4
Simple memorization of the verbs
Ander: Simple memorization of the verbs
The participant reads aloud the verbs that appear on the screen, without additional instructions (control condition).
Actieve vergelijker: Healthy volonteers group 1
Memorization of the verbs by miming the action
Ander: Memorization of the verbs by miming the action
The participant reads aloud the verbs that appear on the screen, by performing the corresponding action verb.
Actieve vergelijker: Healthy volonteers group 2
Memorization of the verbs by imagining the action
Ander: Memorization of the verbs by imagining the action
The participant reads aloud the verbs that appear on the screen, by imagining the corresponding action verb.
Actieve vergelijker: Healthy volonteers group 3
Memorization of the action verbs by means of another word
Ander: Memorization of the action verbs by means of another word
The participant reads aloud the verbs that appear on the screen. Then, he reads, without memorizing it, a word associated with the action verb to be learnt to favor the memorization of that one. The word is written near the action verb.
Actieve vergelijker: Healthy volonteers group 4
Simple memorization of the verbs
Ander: Simple memorization of the verbs
The participant reads aloud the verbs that appear on the screen, without additional instructions (control condition).

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Number of items recalled TBR and TBF
Tijdsspanne: Day 1
It is asked to the participants to recall orally, only TBR verbs (task of reminder). The experimenter notes the given verbs.
Day 1

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Number of recognized items
Tijdsspanne: Day 1

Participants must recognize TBR verbs among several verbs (distractor or TBF verbs) on the screen.The experimenter notes the recognized verbs.

The recognition of a verb in the TBF list or a distractor is considered like an error.
Day 1
Reaction time (ms) on the recognition of TBR and TBF
Tijdsspanne: Day 1
The response times of participants are recorded in ms.
Day 1

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Centre Hospitalier Universitaire de Saint Etienne

Onderzoekers

  • Hoofdonderzoeker: Anne GROSSELIN, MD, CHU de Saint-Étienne

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start

1 mei 2011

Primaire voltooiing (Werkelijk)

1 december 2012

Studie voltooiing (Werkelijk)

1 december 2012

Studieregistratiedata

Eerst ingediend

31 augustus 2015

Eerst ingediend dat voldeed aan de QC-criteria

31 augustus 2015

Eerst geplaatst (Schatting)

2 september 2015

Updates van studierecords

Laatste update geplaatst (Schatting)

23 maart 2016

Laatste update ingediend die voldeed aan QC-criteria

22 maart 2016

Laatst geverifieerd

1 augustus 2015

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • 1001156
  • 2010-A01372-37 (Andere identificatie: ANSM)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

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