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Updated: May 6, 2026

Cross-Modal Multivariate Pattern Analysis

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Published on: November 9, 2011

Development of radial frequency pattern perception in macaque monkeys.

C L Rodríguez Deliz^1,2, Gerick M Lee^1,3, Brittany N Bushnell^4,5

¹Center for Neural Science, New York University, NY, NY, USA.

Journal of Vision

|June 6, 2024

Summary

This summary is machine-generated.

Shape perception in infant macaques emerges early and refines with age. This study tracked the development of visual shape sensitivity in young macaques, revealing key insights into early visual processing.

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Area of Science:

Neuroscience
Developmental Psychology
Primatology

Background:

Infant primates have limited visual acuity, with perceptual functions maturing post-infancy.
Global form perception develops significantly in the first years of life.
The emergence and development of shape sensitivity in early life remain largely uncharacterized.

Purpose of the Study:

To investigate the developmental trajectory of shape sensitivity in infant macaques.
To determine the earliest age at which shape perception is measurable.
To understand how sensitivity to curvature and shape evolves with age.

Main Methods:

Studied 18 macaques aged 2 months to 10 years.
Utilized radial frequency stimuli (sinusoidally modulated circular targets).
Employed a novel four-choice oddity task and a traditional two-alternative forced choice task.

Main Results:

Radial frequency pattern perception was detectable in 2-month-old macaques.
Behavioral performance improved across all radial frequencies with increasing age.
Higher radial frequencies yielded better performance, indicating a developmental prioritization of fine visual details.

Conclusions:

Shape perception is measurable from early infancy in macaques.
Visual shape sensitivity undergoes significant development throughout early life.
The developing primate visual system shows an adaptive prioritization for processing fine visual details.