Commonalities in visual perception between children at familial risk for synaesthesia and in children with autism spectrum disorder

Commonalities in visual perception between children at familial risk for synaesthesia and in children with autism spectrum disorder - Visual perception in synaesthesia and autism spectrum disorder

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

NL-OMON

Registry ID

NL-OMON47046

Enrollment

Registered

2018-02-15

Start date

2017-10-25

Completion date

Unknown

Last updated

2024-02-28

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

Conditions

autisme spectrum stoornis en synesthesie (veranderde waarneming) ASD

Interventions

autism spectrum disorder

synaesthesia

visual perception

Eligibility

Age

2 Years to 11 Years

Inclusion criteria

Inclusion criteria: Autism group: ADOS or ADI-verified ASD diagnosis according to DSM-5, age 4-5 years old, Performance IQ>85 Healthy controls: 4 or 5 years old, starting Group 2 of primary school in same calendar year Healthy controls at familial risk for synaesthesia: as control group but at least one parent has a form of synaesthesia as verified by a consistency test.

Exclusion criteria

Exclusion criteria: visual impairments, seizure disorders, history of serious head injury, claustrophobia, psychotropic medication, genetic syndromes that are known to cause autism spectrum disorder (e.g. Fragile X, Angelman syndrome)

Design outcomes

Primary

Measure	Time frame
The main dependent variables are: * Time locked voltage changes (*V) at different electrode sites (EEG), i.e. the ratio between the N1/ P1 components at occipital sites for achromatic visual stimuli	—

Secondary

Measure	Time frame
- Time locked voltage changes (V) at different electrode sites (EEG) for chromatic visual stimuli - Power changes (V2) at different electrode sites (EEG) - Percentage correct hits in a prospective memory experiment (distractor task) - Reading proficiency scores on a passive and an active reading task (% correct) - Synaesthesia scores (% of consistent colour associations across sessions). - Control measurements: Social Responsiveness Scale, Sensory Profile, IQ tests.	—

Measure

Time frame

- Time locked voltage changes (*V) at different electrode sites (EEG) for chromatic visual stimuli - Power changes (*V2) at different electrode sites (EEG) - Percentage correct hits in a prospective memory experiment (distractor task) - Reading proficiency scores on a passive and an active reading task (% correct) - Synaesthesia scores (% of consistent colour associations across sessions). - Control measurements: Social Responsiveness Scale, Sensory Profile, IQ tests.

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Countries

The Netherlands

Outcome results

None listed

Source: NL-OMON (via WHO ICTRP)