Configural features in the context of upright and inverted faces

Area of Science:

• Cognitive Psychology
• Visual Perception
• Human Face Recognition

Background:

• Face recognition is significantly impaired when faces are presented upside down.
• This phenomenon is widely attributed to the disruption of configural processing, which relies on the spatial relationships between facial features.
• Recent theories suggest configural information involves locally processed relations between facial elements.

Purpose of the Study:

• To investigate whether local relational features, specifically interocular distance, are processed differently in inverted versus upright faces.
• To determine if the face inversion effect is dependent on the processing of facial parts beyond the eye region.
• To examine the role of local feature processing in the disruption of configural face information.

Main Methods:

• Three experiments were conducted using photographic faces.
• Experiment 1: Participants judged interocular distance in sequentially presented upright and inverted faces.
• Experiments 2 & 3: Manipulated facial regions presented (eye region, eyes/nose, eyes/nose/mouth) and altered eye orientation (Thatcher illusion).

Main Results:

• Judging interocular distance was significantly more difficult with inverted faces compared to upright faces.
• The inversion effect persisted even when only the eye region was presented, indicating it does not solely depend on other facial features.
• When eyes were locally inverted within an upright face (Thatcher illusion), the typical inversion effect was eliminated.

Conclusions:

• The findings support the explanation that the face inversion effect results from the disruption of configural facial information.
• Configural information critical for face memory involves spatial relationships sensitive to local facial feature properties.
• Local processing of facial features, such as interocular distance, plays a crucial role in upright face perception and is disrupted by inversion.