Patterns of fixation during face recognition: Differences in autism across age

Area of Science:

• Neuroscience
• Developmental Psychology
• Autism Spectrum Disorder Research

Background:

• Difficulties with face recognition are known to increase from adolescence to adulthood in individuals with autism spectrum disorder (ASD).
• This developmental trajectory suggests a lack of typical late-developing visual processing skills in ASD.
• Understanding the underlying visual scanning patterns is crucial for identifying potential interventions.

Purpose of the Study:

• To investigate age-related differences in visual fixation patterns to eyes and mouths during face recognition in individuals with and without autism.
• To determine if atypical fixation patterns contribute to face recognition difficulties in autism across development.

Main Methods:

• Participants aged 7-30 with and without autism completed the Cambridge Face Memory Test.
• Gaze behavior was recorded, and fixation durations and counts were analyzed for eye and mouth regions of interest.
• Statistical analyses compared fixation patterns between autistic and typically developing groups across different age bands.

Main Results:

• All participants fixated more on eyes than mouths. However, differences emerged with age and diagnostic group.
• Typically developing children and adults showed more eye fixations than autistic individuals, while adolescents with autism fixated more on mouths than typically developing peers.
• Distinct relationships between fixation patterns and face recognition performance were observed in autism versus typical development.

Conclusions:

• Group differences in visual fixation patterns during face processing evolve with age in autism.
• Altered visual scanning strategies, particularly concerning eye and mouth focus, likely contribute to face recognition impairments in autism spectrum disorder.
• These age-dependent visual processing differences highlight potential targets for future therapeutic strategies.