Psychology Chapter 3

our awareness of ourselves and our environment consciousness the principle that info is often simultaneously processed on separate conscious and unconscious tracks dual processing the focusing of conscious awareness on a particular stimulus selective attention failing to see visible objects when our attention is direcred elsewhere inattentional blindness failing to notice changes in the environment change blindness the biological clock circadian rhythm rapid eye movement sleep, a recurring sleep stage during which vivid dreams commonly occur REM sleep the relatively slow brain waves of a relaxed, awake state aplha waves periodic, natural loss of consciousness sleep false sensory experiences, such as seeing something in the absence of an external visual stimulus hallucinations the large, slow brain waves associated with deep sleep delta waves recurring problems in falling or staying asleep insomnia a sleep disorder characterized by uncontrollable sleep attacks, The sufferer may lapse directly into REM sleep, often an inopportune times narcolepsy a sleep disorder charcterized by temporary cessations of breaking during sleep and repeated momentary awakenings sleep apnea a sleep disorder characterized by high arousal and an apperance of being terrified night terrors a sequence of images, emotions, and thoughts passing through a sleeping persons mind dream according to Freud, the remembered story line of a dream manifest content underlying meaning of a dream latent content the tendency for REM sleep to increase following REM sleep deprivation REM rebound a social interaction in which one person suggests to another that certain perceptions, feelings, thoughts, or behaviors will spontaneously occur hypnosis a suggestion, made during a hypnosis session, to be carried out after the subject is no longer hypnotized posthypnotic suggestion a split in consciousness, which allows some thoughts and behaviors to occur simultaneously with others dissociation a chemical substance that alters perceptions and moods psychoactive drug the diminishing effect with regular use of the same dose of a drug, requiring the user to take larger and larger doses before experiencing the drug's effect tolerance the discomfort and distress that follow discontiniuing the use of an addictive drug withdrawal a physiological need for a drug, marked by unpleasant withdrawal symptoms when the drug is discontinued physical dependence a psychological need to use a drug such as to relieve negative emotions psychological dependence compulsive drug craving and use, despite adverse consequences addiction drugs that reduce neural activity and slow body functions depressants drugs tha depress the activity of the cns reducing anxiety but impairing memory and judgement barbiturates depress neural activity, temporarily lessening pain and anxiety opiates drugs that excited neural activity and speed up body functions stimulants drugs that stimulate neural activity, causing speeded-up body functions and associated energy and mood changes amphetamines a powerfully addictive drug that stimulates the cns, with speeded yp body functions and associated energy and mood changes, over time, reduce baseline dopamine levels methamphetamine a synthetic stimulant and mild hallucinogen. produces euphoria and social intimacy, short term health risks and long term harm to serotonin producing neurons and to mood and cognition Ecstasy psychedelic drugs that distort perceptions and evoke sensory images in the absence of sensory inputs hallucinogens a powerful hall. drug also known as acid LSD an altered state of consciousness reported after a close brush with death near-death experience the major active ingredient in marijuana THC