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Related Concept Videos

Factors Affecting Perception01:25

Factors Affecting Perception

Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
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Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...
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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role of...
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Environmental inversion effects in face perception.

Nicolas Davidenko1, Stephen J Flusberg

  • 1Stanford University, Department of Psychology, Jordan Hall, 450 Serra Mall, Building 420, Stanford, CA 94305, USA. ndaviden@psych.stanford.edu

Cognition
|March 20, 2012
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Summary
This summary is machine-generated.

Visual perception of faces depends on orientation. This study found that both the viewer's own orientation (egocentric) and the surrounding environment (environmental) influence face processing, with egocentric orientation having a larger effect.

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Human Face Processing

Background:

  • Visual processing, particularly face perception, is highly sensitive to stimulus orientation.
  • Previous research often conflates egocentric (self-referenced) and environmental (world-referenced) frames of orientation.
  • The specific reference frame(s) influencing face perception remain unclear.

Purpose of the Study:

  • To develop a novel method for dissociating the effects of egocentric and environmental orientation on face processing.
  • To determine which reference frame(s) are critical for accurate face perception.

Main Methods:

  • Participants performed face-processing tasks (expression classification, recognition memory) while lying horizontally.
  • This horizontal posture dissociated the egocentric and environmental reference frames.
  • A control experiment ruled out compensatory ocular counterroll as an explanation for environmental effects.

Main Results:

  • Egocentric orientation significantly impacted face-processing performance.
  • Environmental orientation also showed smaller, yet reliable, effects on face processing.
  • These findings were independent of compensatory eye movements.

Conclusions:

  • Both egocentric and environmental orientations play a role in face perception.
  • Environmental orientation influences face processing, particularly when egocentric orientation is controlled.
  • This study provides a method to disentangle reference frames in visual perception research.