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sense that informs people about the position of their body

size constances

perception of someone/something from past exxperience (from here you look 2 in. tall but i know you're 5 ft from experience)


level of consciousness where you try to remember something from the past

first stage of sleep

lightest stage, brain waves are slow, lasts 30-40 min, no dreams, alpha waves to delta waves


rapid eye movement when you start to dream


sleep disorder.. inability to sleep

night terrors

sleep disorder... wake up thrashing around, gasping for air, nightmares

sleep apnia

sleep disorder... breathing interuptions during sleep

sleep walking

sleep disorder... involves getting up and walking around while unconscious


sleep disorder... involves suddenly falling asleep during the day


state of relaxation


altered state of consciousness when people respond to suggestions and act as if they are in a trance

ways in which hypnosis can be used

1. stop addiction
2. sedation for surgery
3. overcome fears


when a person needs a drug to feel normal



feelings of intoxication

1. don't think clearly
2. can't walk correctly


depressant that relieves pain or induces sleep

syptoms of withdrawl

1. diarheaa
2. vomiting
3. irritability


drug that increases activity in central nervous system

absolute threshold

weakest amount of stimulants that can be sensed

single detection theory

method of distinguishing sensory stimuli that takes into account strengths and weaknesses

difference threshold

minimum amount of difference that can be detected between two stimuli


part in your eye that changes size when you turn on/off the lights

sensory adaption

process where we become less sensitive to unchanging stimuli


way in which we organize or make sense of sensory impressions


way in which we group similar objects together

common fate

when you assume a group is going to the same place

perceptual constances

experince = perception

shape constances

how a shape changes but you know it's the same from experience

color constances

example: when a color of a shirt changes as you turn off the lights but you know it didnt really change


information hidden in your unconscious mind

altered states of consciousness

occurs when you doze off or are under the influence of something

circadiun rythms

biological clock.. what the level of consciousness depends on

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