Can we Forget? Directed Forgetting and Embodied Cognition in Schizophrenia
22. marts 2016 opdateret af: 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.
Studieoversigt
Status
Afsluttet
Betingelser
Detaljeret beskrivelse
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.
Undersøgelsestype
Interventionel
Tilmelding (Faktiske)
96
Fase
- Ikke anvendelig
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
-
-
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Saint Etienne, Frankrig, 42000
- CHU de Saint-Etienne
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-
Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
18 år til 50 år (Voksen)
Tager imod sunde frivillige
Ja
Køn, der er berettiget til at studere
Alle
Beskrivelse
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).
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
|
Eksperimentel: Patients group 1
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.
|
|
Eksperimentel: Patients group 2
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.
|
|
Eksperimentel: Patients group 3
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.
|
|
Eksperimentel: Patients group 4
Simple memorization of the verbs
|
The participant reads aloud the verbs that appear on the screen, without additional instructions (control condition).
|
|
Aktiv komparator: Healthy volonteers group 1
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.
|
|
Aktiv komparator: Healthy volonteers group 2
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.
|
|
Aktiv komparator: Healthy volonteers group 3
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.
|
|
Aktiv komparator: Healthy volonteers group 4
Simple memorization of the verbs
|
The participant reads aloud the verbs that appear on the screen, without additional instructions (control condition).
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Number of items recalled TBR and TBF
Tidsramme: 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
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Number of recognized items
Tidsramme: 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
Tidsramme: Day 1
|
The response times of participants are recorded in ms.
|
Day 1
|
Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Efterforskere
- Ledende efterforsker: Anne GROSSELIN, MD, CHU de Saint-Etienne
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart
1. maj 2011
Primær færdiggørelse (Faktiske)
1. december 2012
Studieafslutning (Faktiske)
1. december 2012
Datoer for studieregistrering
Først indsendt
31. august 2015
Først indsendt, der opfyldte QC-kriterier
31. august 2015
Først opslået (Skøn)
2. september 2015
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
23. marts 2016
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
22. marts 2016
Sidst verificeret
1. august 2015
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- 1001156
- 2010-A01372-37 (Anden identifikator: ANSM)
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
INGEN
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