Cognitive and Emotional Factors in Visual Exploration Among Patients With Schizophrenia (SAILLANCE1)
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|ClinicalTrials.gov Identifier: NCT02874482|
Recruitment Status : Recruiting
First Posted : August 22, 2016
Last Update Posted : February 20, 2019
Patients with schizophrenia are abnormally disturbed by information onsets, which may result in a disadvantage in filtering relevant information. It seems that they accord the same importance to all objects in a scene without taking into account the relevance of objects (cognitive salience) or their emotional charge (salience emotional).
The paradigm of change blindness offers the interesting possibility of studying sensitivity to the sudden irruption of visual information with ecological stimuli in schizophrenia. An increased attentional capture by the irruption of visual information would suggest better performance in patients than in healthy controls. Moreover, patients are disturbed to processing of emotional information, in this way we would like to measure the impact of emotional salience on the visual exploration.
The main objective is to evaluate, if patients with schizophrenia quickly detect changes occurring on irrelevant objects in the understanding of the scene.
To evaluate in patients with schizophrenia the impact of emotional salience using the same paradigm.
To separate an explicit response (motors responses) with an implicit response (eye tracking measures).
30 patients with schizophrenia and 30 healthy controls were asked to detect changes in 96 scenes with 0 or 1 change (neutral or emotional changes). We will measure the participants' speed and accuracy in explicitly reporting the changes via motor responses and their capacity to implicitly detect changes via eye movements.
|Condition or disease|
This study will include one visit:
- Written consent will be obtained from all participants
- Inclusion and exclusion criteria will be checked
- An ophthalmologic test, a pregnancy test, a alcohol test and a salivary test will be realized
- Various symptoms will be assessed with the PANSS (Positive And Negative Syndrome Scale for schizophrenia) and the UPDRS (Unified Parkinson Disease Rating Scale for patients, the MOCA (Montreal Cognitive Assessment), The HAD (Hospital Anxiety and Depression Scale) and the MINI (Mini International Neuropsychiatric Interview) for all participants.
- The task will be divided in two parts:
A visuo-spatial task allowing to record saccadic eye movements (approximately 10 min).
The change blindness session lasted approximately 20 min.
|Study Type :||Observational|
|Estimated Enrollment :||85 participants|
|Official Title:||Study of Cognitive and Emotional Factors Influencing the Visual Exploration Among Patients With Schizophrenia|
|Actual Study Start Date :||July 2014|
|Estimated Primary Completion Date :||August 2020|
|Estimated Study Completion Date :||August 2020|
Patients with schizophrenia
30 patients with schizophrenia (diagnosis based on the standard DSM criteria)
30 healthy controls without any psychiatric or neurological diagnosis
- response time [ Time Frame: 42 months ]The explicit response of the participants will be measure behaviourally by response time before the detection of neutral stimuli.
- sensitivity index [ Time Frame: 42 months ]Performances will be measure by a sensitivity index (D prime) which considers the number of correct detections compared with the missed detections and false alarms; thus it evaluates the capacity to discriminate the signal against a background noise.
- implicit response [ Time Frame: 42 months ]The implicit response will be measure by the localization and duration of fixations
- emotional response [ Time Frame: 42 months ]The emotional response will be measure by the localization, duration of fixations and performances for the detection of emotional stimuli
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02874482
|Contact: Pierre GRANDGENEVRE||+33 3 20 44 45 firstname.lastname@example.org|
|Contact: Anne-Laure DEMARTY||+33 3 20 44 68 email@example.com|
|University Hospital, Lille||Recruiting|
|Lille, France, 59037|
|Principal Investigator: Guillaume VAIVA|
|Sub-Investigator: Pierre GRANDGENEVRE|
|Principal Investigator:||Guillaume VAIVA||University Hospital, Lille|