Eye-Tracking Methodology to Detect Differences in Attention to Faces Between Developmental Language Disorder and...

Area of Science:

• Developmental Psychology
• Neurodevelopmental Disorders
• Ophthalmology

Background:

• Developmental language disorder (DLD) and autism spectrum disorder (ASD) share overlapping behavioral characteristics.
• Research on visual scanning patterns (VSP) in autistic children is extensive, but scarce for children with DLD.
• Understanding face processing differences is crucial for early diagnosis and intervention.

Purpose of the Study:

• To compare the VSP of faces in young children with DLD, autism, and typically developing peers.
• To investigate the influence of emotion, gender, and age on face VSP in these groups.
• To identify common and distinct VSP markers for DLD and autism.

Main Methods:

• Two eye-tracking experiments were conducted with children aged 32-74 months.
• Paired preference tasks presented simultaneous face images to assess attentional orientation, visual preference, and processing depth.
• VSP was operationalized by analyzing gaze patterns in response to varying facial stimuli.

Main Results:

• Two common VSP markers were identified for both DLD and autism: superficial face processing and late orientation to angry and child faces.
• Children with DLD showed a typical preference for child faces, unlike autistic children who exhibited a diminished preference.
• These findings suggest shared and distinct visual attention patterns related to face processing in DLD and autism.

Conclusions:

• Difficulties in face attention for children with DLD have been underestimated, showing similarities to autism.
• Eye-tracking and VSP analysis can aid in assessing face attention and improving early differential diagnosis for DLD and autism.
• Clinical practices should consider these findings to better identify and support children with DLD.