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PSYCH 1.5c-1.6a
| Term | Definition |
|---|---|
| Parasomnia | an undesirable behavior or experience during sleep --> sleep walking/talking, terrors |
| Insomnia | persistent problems in either falling or staying asleep |
| Narcolepsy | sudden attacks of overwhelming sleepiness, usually lasting less than 5 mins |
| Sleep apnea | intermittently stop breathing during sleep |
| Night terrors | target mostly children, who may sit up or walk around, experience doubled heart rate and breathing rates, appear terrified while asleep --> NREM 3 |
| Somnabulism | sleepwalking; NREM 3 --> usually harmless *runs in families* |
| REM sleep behavior disorder | a sleep disorder in which normal REM paralysis does not occur --> twitching, talking, or even kicking/punching may occur |
| Information-Processing theory of dreams | dreams may help sift, sort, and store the day's experiences in our memory |
| Activation-Synthesis theory of dreams | dreams are the brain's attempt to synthesize random neural activity |
| REM rebound | the tendency for REM sleep to increase --> following REM sleep deprivation |
| sleep hygiene | keep your routine consistent, budget 30 mins for winding down, dim your lights, unplug from electronics, test methods of relaxation, don't toss and turn |
| sensation | the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment |
| perception | the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events |
| bottom-up processing | starting with the sensory input, the brain attempts to understand/make sense |
| top-down processing | guided by experience and higher-level processes, we see what we expect to see |
| transduction | conversion of one form of energy, such as light waves, into another form, like neural impulses that our brain can interpret |
| psychophysics | the study of relationships between the physical characteristics of stimuli --> their intensity, and our psychological experience of them |
| absolute threshold | the minimum stimulation needed to detect a particular stimulus 50% of the time |
| difference threshold | the minimum difference between two stimuli required for detection 50% of the time |
| weber's law | the principle that, to be perceived as different, two stimuli must differ by a constant minimum percentage (rather than a constant amount) |
| signal detection theory | a theory predicting how and when we detect the presence of a faint stimulus amid background stimulation |
| subliminal stimuli | not detectable 50% of the time --> below your absolute threshold |
| sensory adaptation | diminished sensitivity to stimuli as a consequence of constant stimulation *ACCLIMATE* |
| signal detection theory conditions | 1. the strength of the signal 2. our psychological state |
| 3 steps involved in sensation | 1. receive 2. transform 3. deliver |