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Sensory process & perception Sensory process & perception

Sensory process & perception - PowerPoint Presentation

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Uploaded On 2016-03-08

Sensory process & perception - PPT Presentation

Eesha Sharma MD Sense organs Receptor potential Generator potential Psychophysics Gustav Theodor Fechner 1860 Quantitative relationship between physical stimuli and the sensations and perceptions they effect ID: 247104

constancy perception relationship perceptual perception constancy perceptual relationship processing movement visual experience motion stimuli figure differences individual thresholds unchanged

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Presentation Transcript

Slide1

Sensory process & perception

Eesha Sharma, MDSlide2

Sense organsSlide3
Slide4

Receptor potential

Generator potentialSlide5

Psychophysics

Gustav Theodor Fechner, 1860

Quantitative relationship between physical stimuli and the sensations and perceptions they effect

S

ubject’s experience or behaviorObjectively measurable stimuliAbsolute thresholds

Discrimination thresholdsScalingSlide6
Slide7
Slide8
Slide9
Slide10
Slide11
Slide12

Perceptual processes

Attention

Form perception

Visual depth perceptionConstancyMovement perceptionPlasticityIndividual differencesSlide13

Attention

The perceptual process that selects certain inputs for inclusion in our conscious experience, or awareness, at any given timeSlide14

Filtering

Parallel processing

Serial processing

Processing capacitySlide15

Form perception

Recognition of a figure on a groundSlide16

ContoursSlide17

Organization

Gestalt: The whole is more than the sum of its parts

Laws of perceptual organization

ProximitySimilarityS

ymmetry or good figureContinuationClosureSlide18
Slide19
Slide20

Visual depth perception

Monocular cues

Linear perspective

ClearnessInterpositionShadows

Gradients of textureMovement

Binocular cues

Retinal disparitySlide21
Slide22

Constancy

Size constancy

Results when the object and its background change together in such a way that the relationship between them stays the same

Moon in the night skyBrightness constancy

Result of unchanged brightness ratiosSlide23
Slide24

Movement perception

Real motion perception

Constancy: because of unchanged relationship between object and its background

The brain comparator Apparent motion

Stroboscopic motionAutokinetic effectInduced movement Slide25

Plasticity

Visual deprivation

Sensitive period

Nature and nurtureSlide26

Individual differences

Perceptual learning

An increase in the ability to extract information from the environment as a result of experience or practice with the stimulation coming from it

Ornithologists; Blind people

SetReadiness or priming for certain kinds of sensory input Motives and needs

Rorschach inkblotsPerceptual-cognitive styleFlexibility

Field dependenceSlide27
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