Remote eye tracking assesses age dependence processing of coherent motion in typically-developing children

Area of Science:

• Developmental psychology
• Neuroscience
• Ophthalmology

Background:

• Coherent motion processing is crucial for visual perception and navigation.
• Understanding developmental changes in motion perception is key to identifying potential visual processing deficits.
• Ocular motor responses provide objective measures of visual processing efficiency.

Purpose of the Study:

• To quantify age-related differences in processing different types of coherent motion using ocular motor response times.
• To investigate how motion coherence type influences reaction times in children.
• To establish normative data for visual processing in typically developing children.

Main Methods:

• Utilized remote eye tracking to measure ocular motor response times.
• Employed three types of Random Dot Kinematograms (RDKs): vertical (RDK1), diagonal (RDK2), and expansion (RDK3).
• Quantified orienting eye movements via Reaction Time to the first Fixation (RTF) in two age groups (0-3+ and 4-12+ years).

Main Results:

• Significantly prolonged RTF observed in the youngest group (0-3+ years) compared to the oldest group (4-12+ years) across all RDK types.
• The oldest group exhibited significant differences in RTF depending on the RDK type presented.
• Results indicate a clear age-dependent pattern in the processing of coherent motion.

Conclusions:

• Ocular motor response times reveal significant age-related differences in coherent motion processing in children.
• The type of coherent motion impacts visual processing efficiency, particularly in older children.
• This study highlights the utility of eye-tracking for assessing developmental visual processing capabilities.