Visual Exploration and Attention: Studies in Patients With Schizophrenia and Autism Spectrum Disorders

Visual Exploration and Attention : Studies in Patients With Schizophrenia and Autism Spectrum Disorders

Status

UNKNOWN

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT00914030

Enrollment

140

Registered

2009-06-04

Start date

2009-06-30

Completion date

2016-12-31

Last updated

2016-08-26

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Autism Spectrum Disorders, Schizophrenia

Keywords

Visual perception, Local/global processing, Attention, Visual priming, Collinearity, Grouping

Brief summary

The aim of the protocol is to better understand the impairments in visual processing, as such impairments may induce social interaction difficulties in subjects with autism spectrum disorders (adults and children) and schizophrenia, like face exploration.The same protocol will be used for the three populations, each population being compared with matched controls. The explorations are designed to test two different hypotheses regarding the mechanisms of the visual perception difficulties of the two populations. Even though difficulties to extract the global form of objects have been described in both subjects with autism and schizophrenia, we will test two different hypotheses for the two populations. We will test the hypothesis that subjects with autism display an advantage for the processing of local information arising at an early level of processing, whereas disorders observed in patients with schizophrenia originate from attention disorders. The protocol includes three consecutive studies, each one being applied in each of the three populations.

Interventions

OTHERNeuropsychological evaluation

Study one: global/local processing, with a neutral prime (stimulus influencing the processing of the subsequent stimulus)Study two: global/ local processing with a prime whose elements are collinear.Study three: global/local processing with a prime whose elements are not collinear

Study design

Observational model

CASE_CONTROL

Time perspective

CROSS_SECTIONAL

Eligibility

Sex/Gender

ALL

Age

7 Years to 55 Years

Healthy volunteers

Yes

Inclusion criteria

* IQ above 70, as evaluated with the WAIS III in adults and with the WISC in children * signed consent * DSM IV criteria in case of autism spectrum disorders or schizophrenia

Exclusion criteria

* grave or non stabilized somatic pathology * pathology affecting the central nervous system; other than the studied pathologies * intake of psychotropic drug, except for patients * invalidating sensory processes

Countries

France

Contacts

Primary ContactGIERSCH Anne, MD

giersch@unistra.fr

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026