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Units 1-3 Exam
Chapter 5: Sensation+Perception
| Question | Answer |
|---|---|
| Sensation | detection of physical stimuli+transmission of that info to the brain |
| Perception | the brain's further processing, organization, interpretation of sensory info |
| Weber's Law | the difference threshold is based on the proportion of the original stimulus rather than a fixed amount of difference |
| Sensory Threshold | The point at which a stimulus causes a sensation within an individual |
| Rods | retinal cells that respond to low levels of light in black and white perception |
| Cones | retinal cells that respond to high levels of light in color perception |
| Trichromatic Process Theory | color vision results from activity in 3 types of cones that are sensitive to diff. wavelengths in the retina |
| Opponent Process Theory | colors have opposites; exxplains second stage of visual processing |
| Visual Search (Feature) | require identification of a pop-out target, defined by a single feature |
| Visual Search (Conjunction) | require identification of a target defined by a combination of two features |
| Object Completion | a perceptual inference that requires infants to recognize the unified and reversible aspects of an object in space |
| Illumination | hue, saturation, lightness |
| Depth Perception Cues | Monocular Depth Cues+Binocular Depth cues (binocular disparity) |
| What's special faces? | have special properties and developed unique skills in recognizing them |
| Hearing Aids | increasing volume |
| Cochlear Implants | a small electronic device that can help provide the sense of sound to a person who has a severe hearing impairment due to lost of hair cells |
| Two Types of Pain | Fast Fibers ; Slow Fibers |
| Five kinds of taste receptors | Sweet, Sour, Bitter, Salty, Umami (Savory) |
| importance to thalamus to sensation + perception | relays sensory impulses from receptors --> cerebral cortex -signal travels= sensation - sensation is then passed onto the cerebral cortex for interpretation as touch, pain or temperature. |
| top-down processing | is how knowledge shapes the interpretation of sensory info |
| bottom-down processing | based on the physical features of the stimulus |
| Signal Detection Theory | a theory where the detection of stimulus requires judgment |
| absolute threshold | the minimum intensity of stimulation before experiencing a sensation |
| Ventral Stream | projects occipital --> temporal; functions for the perception of objects; "what' stream |
| Dorsal Stream | projects occipital--> parietal; functions for the spatial (distance) relationship; "where" stream |
| Occlusion | nearby object blocks far away one |
| Relative Size | far off objects project smaller retinal image than close ones if same size |
| Familiar Size | large familiar objects--> able to determine the distances by the size of their retinal images |
| Linear Perspective | parallel lines seem to converge in distance |
| Texture Gradient | textured surface recedes=becomes dense |
| Position relative to Horizon | below horizon= appear higher in visual field vice versa |
| Binocular Disparity | each eye has a slightly diff retinal image |
Created by:
jane.s_27
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