Psych notes 2 - Psych notes 2.12.10 Perceptual...

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Psych notes 2.12.10 Perceptual interpretation (module 14) Sensory deprivation -what is the difference between a critical period & a sensitive period? -early in life versus late in life (cant identify objects by sight that are familiar by touch perceptual set -mental tendency to perceive one thing and not another -experiences, assumptions and expectations influence what we perceive perception: our version of reality -what contributes? -biology: sensory analysis, what happened during our critical period of sensory development -psychological influences: selective attention, emotional context, perceptual set -socio-cultural: cultural norms/assumptions/expectations … physical context effects …… biopsychosocial phenomenon module 15 – waking & sleeping rythems at no point during sleep does brain activity stop waking consciousness consciousness- awareness, being awake selective attention: focusing conscious awareness on a particular stimuli, cocktail party effect information processing- controlled & automatic controlled processing requires alertness, absorb attention, interfere with novel activites automatic processing requires minimal attention produce no interference biological rythems: annual, monthly, daily, 90 minutes (periodic physiological fluctuations) biological- rhythmic physiological changed circadian rhythm-body rhythm occurring on a 24 hour cycle sleep stages sleep- natural, reversible loss of consciousness sleep stages: stages 1-4, REM sleep alpha waves- slow brain waves when youre relaxed & awake stage 1 sleep: brief about 5 minutes, characterized by hypnic jerks stage 2: about 20 minutes, increased relaxation – appearance of sleep, sleep spindles on EEG… talking in sleep stage 3: stage 3, brief transitional stage, delta waves appear stage 4 lasts 25-30 mins stages 3-4 together known as slow wave sleep, delta waves on EEG
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REM sleep- rapid eye movement, when we dream & have most vivid dreams “paradoxical sleep”- because eeg looks like person is awake sleep deprivation: effects of sleeploss: paranoia, slower reflexes, hallucinations, insomnia, lack of concentration, irritability, weakened immune system, fatigue, slowed performance, rem rebound: rem sleep increases following rem deprivation sleep disorders insomnia- recurring problem falling or staying asleep… alcohol and sleeping pills reduce REM sleep narcolepsy- uncontrollable sleep attacks sleep apnea- temporarily stop breathing during sleep, correlated with obesity night terrors- arousal, terror, occurs within 2-3 hours of sleep during stage 4 usually dreams freud – dreams are about wish fulfillment, to express unacceptable feelings manifest content- the remembered story line of a dream latent content – the underlying meaning of a dream manifest: Latent: apples breasts snake penis spider incest queen mother water birth traveling in a boat down a river…… life prophecy modern dream theories information processing theory- memory consolidation, simulates neural development activation synthesis- dreams are the brains attempt to make meaning from random activity
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