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Psychology exam1
Psychology ch. 4
| Question | Answer |
|---|---|
| What is Sensation? | Process which u detect stimuli from body or surroundings. |
| Perception? | Organizing stimulation into meaningful patterns. |
| Absoulute Sensory threshold? | minumum amount of stimulation a person can detect 50% of the time. |
| what is signal detection theory? | actual state of stimulus...(present:hit or false alarm. absent: miss or correct rejection) |
| What is sensory adaption? | Stop noticing a constant level of stimulation. |
| Why doesnt sensory adaption work well for sight? | b/c SACCADES: eye muscle movements movements that constantly refocus what your looking at. |
| Wave variation equals | Variations of colors. |
| Rods? | blk & white, take over dim light and peripheral vision. |
| cones? | color 3 types (red, green, blue) |
| What frequencies appear as visible light? | 400-700 nm) |
| Trichromatic theory of color vision? | Each cone serves one color function (red, green and blue) |
| Opponent Process | color recep> red-green, blue- yellow, black -white |
| retinex theory? | we percieve color through the cerebal cortex's comparison of various retinal patterns. |
| Who would say "the whole is greater than the sum of it's parts" | gestalt psychologist |
| top down processing and bottom up? | Top:start off w/ expectation of wat u see Bottom-up: no preconcieved expectation of what u see (more difficult) |
| Gestalt principles | 1.Figure ground2.Proximity: things that are close in distance percieved as same form.3.closure: eye will fill in small gaps in a figure.4.continuity:group things into simplest form. |
| Mixture of sound waves? | timbre: quality of sound |
| What pitches can humans percieve? | 20-20,000 hz |
| basilar membrane? | Lines middle of cochlea..ha stiny hair cells that are sonsory receptors for pitch. |
| Binoclular cues? | use 2 eyesconvergence: eye rotation w/t sockets, looking at something close eyes rotate in and a lot of musle tention.Binocular/retinal disperity: image being projected on retina. |
| monocular cues? | interposition: when 1 obj partially covers another the one you see in entirity is closer.Relative size: when u kno size of obj u can judge size of objs aroundlinear perspective: parallel lines will appear to converge at a point in the distance. |
| Pitch perception theories | place: 1000 and upfrequency: below 100 (entire membrane vibrates)volley: about 100 to 400 (particular spots vibrate times # of secs.) |
| How many basic tastes are there? | 5 (sweet, sour, salty, bitter and msg) |
| What does the vestibular sense control? | reports tilt of the head, acceleration of the head and orientation of the head. |
| how powerful is subliminal perception? | is the idea that a stimulus can influence of behavior even when presented faintly that we do not percieve it consciencely. |
Created by:
ejtaylo2
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