Developmental Language Difficulties: Behavioural and Electrophysiological Studies

Developmental Language Difficulties: Behavioural and Electrophysiological Studies of the Connections Between Spoken and Written Language and Specificity of These Disorders

This study will help to better characterize oral and written language disorders and determine if these disorders are continuous or not. The participants ( dyslexic and dysphasic patients and control adults) will carry out an auditory lexical decision task during which an electroencephalogram (EEG) will be recorded.

Inclusion Criteria (patients):

• Non-verbal intelligence quotient (IQ) less than 85 according to the Wechsler Intelligence Scale for Children (WISC) perceptual index
• Specific oral language disorders diagnosed by the multidisciplinary team (neurologist, psychologist, speech therapist): understanding language deficit, estimated by the test SCOTLAND (Lecocq, 1996) and / or vocabulary test (Dunn Thiébaud).
• Specific written language disorders (dyslexia) diagnosed by a multidisciplinary team according to a test that can objectify the late reading (Alouette) and locate deficits (EVALEC)
• Be affiliated to a social security regimen
• Have signed an informed consent or signed by the parents if the patient is minor
• Aged at least 8 years old

Inclusion Criteria (controls)

• Non-deficit (>85) non-verbal Wechsler Scale (codes and matrices)
• No specific oral language disorders
• No specific written language disorders (dyslexia)
• Be affiliated to a social security regimen
• Have signed an informed consent or signed by the parents if the patient is minor
• Aged at least 8 years old

Exclusion Criteria:

• Mother tongue other than French
• Non-verbal reasoning abilities below 85 measured by the WISC 4 (for patients only) and Non-verbal capacities of reasoning lower than the normal measured by the non-verbal scale of Wechsler (for controls only)
• Presence of pervasive developmental disorders
• No affiliation to a social security regimen
• Absence of signature of the informed consent
• Subject of less than 8 years