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Definition
Perceiving does not affect the nature of distal stimulus.
Mind as tabula rasa.
EMPIRICISTS
limitations: retina 2D images of 3D world
'solution'- learning/experience |
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Definition
| Object in the real world. |
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Term
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Definition
| Stimulus as it appears to sensory receptors. |
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Definition
catergorise and interpret.
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Term
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Definition
Ability to interpret distal object accurately despite changes to proximal image.
DEPTH CUES: information which signals distance of observer to Distal stimulus.
Binocular cues: depth cue based on the slightly different positions of each eye |
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Definition
Automatic constancy
Use supplementary info. |
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Definition
visible expectrum.
Amplitude: brightness
Wavelength: colour |
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Term
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Definition
| process of changing energy from stimulus (e.g. light) into electrical energy for neural communication. |
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Term
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Definition
Low visual acuity.
Achromatic
Perifery of fovea
rhodopsin: for brightness. |
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Definition
Fovea
Chromatic
High visual acuity- closely packed- fine detail.
iodopsin: trichromatic
each sensitive to a specific range of wavelengths. |
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Term
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Definition
Photoreceptors stimulate (depolirize) bipolar cells. - when photopigment breaks down.
Bipolar cells excite ganglion cells.
Axons converge to form optic nerve
(blindspot as no photoreceptors)
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Term
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Definition
Right hemisphere receives information of left visual field from BOTH eyes, and vice versa.
Crossover of optic fibres happens at optic chiasm. |
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Term
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Definition
WHERE pathway: occipital-parietal
WHAT pathway: occipital-temporal
(agnosia if lesion on what pathway)
*occipital: vision
temporal: object recognition
parietal: spatial organisation |
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Term
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Definition
Contrast- marks boundaries- easier to detect shapes.
Edge enhancement: visual system actively amplifies brightness boundaries.
Lateral inhibition: activity in a neuron inhibits response from adjacent neuron.
Form Perception: cells 'tuned' to pick up certain features.
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Term
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Definition
Feature Net: hierarchy of perception (beggining with feature detectors). bottom-up processing.
Top-down processing: beliefs and expectations influence perception. |
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Term
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Definition
| ·similarity ·continuity ·proximity ·closure ·simplicity ·symmetry |
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Definition
| Basic 3D shapes organised to interpret objects. |
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Term
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Definition
Selection process. -Orienting: direct form of selection.
- Visual search: pop-out- target can be identified from a single feature.
- Conjunction search: target identified from a combination of features.
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Term
| Filter Theories of Attention |
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Definition
Early Selection: sensory analysis (filter)- meaning- processing
Late Selection: sensory analysis- meaning (filter)- processing.
Attenuation Theory: unshadowed message (spesh salient info) is attenuated rather than filtered out- still available for some analysis.
*Unattended information changes interpretation of ambiguous stimulus. |
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Term
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Definition
Inattentional blindness: miss something because preoccupied with something else.
Neglect Syndrome.
Change blindness: inability to detect changes to an image unless direct attention to specific location. |
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