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External and internal facial features modulate processing of vertical but not horizontal spatial relations
Günter Meinhardt1, David Kurbel1, Bozana Meinhardt-Injac2
1Department of Psychology, Methods Section, Johannes Gutenberg University Mainz, Germany.
Vision Research
|March 24, 2018
Summary
Face inversion effects differ for horizontal and vertical changes. Horizontal changes rely on local eye cues, while vertical changes integrate multiple facial features for accurate perception.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Vision Science
Background:
- An asymmetry in the face inversion effect for horizontal and vertical relational changes has been previously reported.
- Research has explored whether disruptions in long-range facial relations explain this horizontal/vertical (H/V) inversion asymmetry.
Purpose of the Study:
- To investigate how detecting changes in interocular distance (horizontal) and eye height (vertical) relates to internal facial features and external context.
- To determine the underlying processing mechanisms responsible for the H/V inversion asymmetry.
Main Methods:
- Participants detected changes in interocular distance (H) and eye height (V) under varying conditions of internal and external facial cues.
- The study analyzed performance and inversion effects in relation to the presence and type of facial cues.
Main Results:
- The H/V inversion asymmetry was replicated.
- Detecting horizontal changes showed cue independence, suggesting localized processing tuned to the eye region.
- Detecting vertical changes demonstrated strong cue dependency, indicating a global mechanism integrating information across facial regions.
Conclusions:
- The H/V asymmetry in the face inversion effect is linked to an H/V anisotropy in face cue dependency.
- Horizontal relational changes rely on specialized local processing, unaffected by other facial cues.
- Vertical relational changes depend on global cue integration, which is disrupted by face inversion.
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