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Face inversion effect and exposure duration on age classification accuracy
Janice Attard-Johnson1, Jack Clifton1, Alejandro J Estudillo1
1Department of Psychology, Faculty of Science and Technology, Bournemouth University, Fern Barrow, Poole, UK.
Perception
|June 10, 2025
Summary
Facial age perception accuracy decreases when faces are inverted. Longer exposure durations improved age classification, but only when participants viewed faces for the entire duration, indicating orientation is key for age perception.
Area of Science:
- Cognitive Psychology
- Visual Perception
Background:
- Facial identity recognition is sensitive to orientation and exposure duration.
- Facial age perception research has not extensively explored these factors.
Purpose of the Study:
- To investigate the effects of face orientation and exposure duration on facial age classification accuracy.
- To determine if these factors uniquely or interactively affect age perception.
Main Methods:
- A facial age categorization task (classifying faces as over/under 18) was used.
- Face orientation (upright/inverted) and exposure duration (250ms/2000ms) were manipulated.
- Two experiments were conducted, varying response timing.
Main Results:
- Age classification accuracy was significantly impaired by inverted faces.
- Longer exposure durations improved accuracy when full viewing was enforced.
- No interactive effect was found between orientation and exposure duration.
Conclusions:
- Accurate facial age classification depends on holistic facial information.
- Face inversion disrupts the processing of age-relevant facial cues.
- Exposure duration can influence age perception, but orientation plays a critical role.
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