An investigation on the face inversion effect in deaf children

Area of Science:

• Cognitive Psychology
• Developmental Psychology
• Neuroscience

Background:

• Holistic face perception is crucial for social interaction and develops throughout childhood.
• The face inversion effect, a disruption in recognizing upside-down faces, is a key measure of holistic face processing.
• Understanding face processing in deaf or hard of hearing (DHH) children offers insights into sensory and developmental influences on cognition.

Purpose of the Study:

• To investigate the face inversion effect in DHH children aged 7-17.
• To compare configural and featural face processing in DHH versus hearing children.
• To examine the impact of face inversion on eye and mouth regions in DHH children's facial processing.

Main Methods:

• Utilized the face dimensions task with parametrically manipulated facial features (configural and featural information).
• Analyzed the face inversion effect in DHH children and compared it to hearing children.
• Assessed processing of eye and mouth regions under upright and inverted face conditions.

Main Results:

• DHH children (7-17 years) demonstrated a significant face inversion effect.
• Inverted faces disrupted both featural and configural processing of eyes and mouths in DHH children.
• Configural processing was more impaired by inversion than featural processing, with greater differences in DHH children.
• Age-related changes in face inversion sensitivity were observed in DHH children, particularly a decrease in configural mouth processing with age.

Conclusions:

• DHH children exhibit a robust face inversion effect, indicating holistic face processing abilities.
• The dual-mode hypothesis of face processing is supported, with configural information being more susceptible to inversion.
• Developmental trajectories of face processing, particularly configural mouth processing, differ between DHH and hearing children.