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Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings
Published on: August 1, 2018
Multiple perceptual strategies used by macaque monkeys for face recognition
Katalin M Gothard1, Kelly N Brooks, Mary A Peterson
1Department of Physiology, College of Medicine, The University of Arizona, 1501 N. Campbell Ave, Room 4104, Tucson, AZ 85724, USA. kgothard@email.arizona.edu
Animal Cognition
|September 13, 2008
Summary
Monkeys recognize familiar faces using configural and feature-based strategies. However, they rely more on feature-based processing for recognizing human faces, showing distinct perceptual strategies for conspecifics versus humans.
Area of Science:
- Comparative psychology
- Neuroscience
- Primate behavior
Background:
- Social integration in macaques implies efficient conspecific recognition.
- Humans and great apes use holistic, configural, and feature-based face processing.
- The specific face recognition strategies in monkeys remain largely unknown.
Purpose of the Study:
- To investigate the perceptual mechanisms monkeys use for face recognition.
- To compare face recognition strategies for conspecifics versus humans in monkeys.
- To determine the relative contribution of configural and feature-based processing in monkey face recognition.
Main Methods:
- A visual paired comparison task was used to measure face recognition in three monkeys.
- Monkey and human faces were manipulated (rotation, inversion, spatial filtering) to isolate processing strategies.
- Gaze patterns, specifically time spent looking at facial features, were analyzed.
Main Results:
- Monkeys recognized axially rotated and spatially filtered conspecific faces, with preferential looking at the eyes.
- Face recognition of conspecifics was impaired by inversion in two of three monkeys.
- Monkeys recognized upright human faces but used different feature-exploration patterns and showed impaired recognition for inverted or low-pass filtered human faces.
Conclusions:
- Monkeys exhibit distinct recognition success and perceptual strategies for conspecifics versus humans.
- Conspecific face recognition involves both second-order configural and feature-based processing.
- Human face recognition by monkeys primarily relies on feature-based strategies.
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