Enhanced visual exploration for real objects compared to pictures during free viewing in the macaque monkey

Area of Science:

• * Cognitive Neuroscience
• * Animal Behavior
• * Visual Perception

Background:

• * Understanding how animals perceive pictures as representations of real objects is crucial for visual cognition research.
• * Previous studies often rely on training animals to transfer knowledge between object and picture domains.
• * A gap exists in understanding spontaneous object-picture perception without task-specific learning.

Purpose of the Study:

• * To investigate object-picture perception in naïve macaque monkeys using spontaneous visual exploration.
• * To examine similarities and differences in gaze behavior when viewing real objects versus their pictures.
• * To determine if macaques perceive a correspondence between objects and their pictorial representations.

Main Methods:

• * Two naïve macaque monkeys were presented with objects and their corresponding pictures on a computer monitor.
• * Free-viewing visual exploration behavior, including gaze allocation and looking strategies, was recorded.
• * Temporal dynamics, habituation rates, and spatial gaze patterns were analyzed for both stimulus types.

Main Results:

• * Monkeys spontaneously looked longer at object stimuli compared to picture stimuli.
• * Striking similarities were observed in the temporal dynamics of gaze allocation and habituation rates.
• * Differences in spatial gaze patterns and looking strategies emerged, with visual saliency models better predicting attention for objects.

Conclusions:

• * Macaque monkeys demonstrate evidence of correspondence between objects and their pictures.
• * Spontaneous visual exploration is a valid method for studying object-picture perception without extensive training.
• * The findings suggest potential advantages of using object stimuli over pictures in visual cognition studies.