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Related Concept Videos

Perception01:28

Perception

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Perception is a fundamental psychological process that enables individuals to organize, interpret, and consciously experience sensory information. This process is crucial for understanding and interacting with the world around us. It includes both bottom-up and top-down processing, each playing a distinct role in how we perceive our environment.
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
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Factors Affecting Perception01:25

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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.
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Perceiving Loudness, Pitch, and Location01:21

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The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
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Auditory Perception01:17

Auditory Perception

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The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the...
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Framing Effects03:26

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Information is everywhere and its presentation—such as how and when items are presented—can impact our perceptions and decisions surrounding the info. This broad concept umbrellas framing effects—influences that occur due to the way information is framed in its appearance, whether it’s purely the order or the specific wording of a message. Let’s take a look at numerous ways in which two versions of something can objectively say the same thing, yet we respond in...
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Timing and Consequences on Behavior01:08

Timing and Consequences on Behavior

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In operant conditioning, the timing of reinforcement is crucial. For animals like rats and cats, immediate reinforcement (within a few seconds) is much more effective than delayed reinforcement. For example, a food reward for a rat needs to follow within 30 seconds of pressing a bar to be effective. 
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Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
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Tuning perception and decisions to temporal context.

Philippe Blondé1, Árni Kristjánsson1, David Pascucci2

  • 1Icelandic Vision Laboratory, School of Health Sciences, University of Iceland, Reykjavik, Iceland.

Iscience
|October 9, 2023
PubMed
Summary
This summary is machine-generated.

Serial dependence in perception is influenced by temporal correlations. Increasing stimulus history correlation caused repulsive biases, while decision history correlation reduced attractive biases, highlighting temporal context

Keywords:
Cognitive neuroscienceSensory neuroscience

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Computational Neuroscience

Background:

  • Serial dependence, a bias in perceptual decisions towards previous stimuli, is theorized to stem from the assumption of temporal correlation in sensory input.
  • Previous research often employed random stimulus sequences, lacking true temporal consistencies, thus limiting the understanding of this phenomenon.

Purpose of the Study:

  • To investigate the role of actual temporal correlations in visual stimuli on serial dependence.
  • To differentiate the effects of temporal correlations at different timescales: within-trial stimulus history and across-trial decision history.

Main Methods:

  • Two experiments were conducted where participants reproduced the orientation of visual stimuli.
  • Temporal correlations in stimulus features were systematically manipulated at two timescales: stimulus history within a trial and decision history across trials.

Main Results:

  • A dissociation was observed: increased temporal correlation in stimulus history led to adaptation-like repulsive biases.
  • Conversely, increased temporal correlation in decision history resulted in reduced attractive biases.

Conclusions:

  • Temporal correlation enhances the visual system's discriminative abilities.
  • This study reveals the critical role of broader temporal context in shaping perceptual decisions and serial dependence.