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Updated: Aug 19, 2026

Eye Tracking Young Children with Autism
Published on: March 27, 2012
Course of autism signs in the first year of life
S Maestro1, F Muratori, A Cesari
1Division of Child Neuropsychiatry, Scientific Institute Stella Maris, Pisa University, Pisa, Italy.
Insights
Most children diagnosed with autism spectrum disorder (ASD) show symptoms within the first year of life. Early identification of these patterns is crucial for timely intervention and support.
Area of Science:
- Developmental Psychology
- Neuroscience
- Pediatrics
Background:
- Autism spectrum disorder (ASD) is often present from birth, but onset patterns vary.
- Lack of clear criteria hinders differentiation between early-onset and regressive ASD.
- Understanding early symptom presentation is vital for diagnosis and intervention.
Purpose of the Study:
- To determine the onset time, type, frequency, and stability of ASD symptoms in the first year of life.
- To identify typical early behavioral patterns in infants later diagnosed with ASD.
- To inform early diagnosis and treatment strategies for ASD.
Main Methods:
- Analysis of 40 home movies of children diagnosed with ASD using a behavioral summarized evaluation scale.
- Retrospective assessment of early developmental and behavioral patterns.
- Identification of symptom clusters and their prevalence in the first year.
Main Results:
- 87.5% of children with ASD exhibited symptoms within the first year of life.
- Only 12.5% of subjects were symptom-free in their first year.
- A characteristic pattern emerged: social withdrawal, poor social initiative, hypoactivity, and atypical emotional modulation.
Conclusions:
- Early identification of ASD symptoms in the first year is possible and common.
- A distinct pattern of early symptoms suggests specific developmental trajectories.
- Findings support the importance of early screening and intervention for ASD.
Abstract:
Autism spectrum disorders (ASD) are thought to be present right from birth, even if a minority of children displays a normal course during infancy followed by a regression during the second year of life. However, established criteria are not yet available to differentiate these different courses of ASD, and data coming from different sources have not yet been organized into a clear definition. The aim of this study was to elucidate the time of onset, as well as type, frequency and stability of symptoms during the first year of life in ASD. The behavioral summarized evaluation scale, applied to 40 home movies of children later diagnosed as having ASD, showed that most of the subjects (87.5%) display symptoms within the first year of life, when only a small group (12.5%) is completely symptom free. A group of more rated symptoms was found, constituting a typical pattern characterized by being withdrawn, and displaying poor social initiative, hypoactivity, and lack of emotional modulation. The importance of these findings is discussed in relation to early diagnosis and treatment.
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