Chapters 3-4StudyGuide.docx

Chapters 3-4StudyGuide.docx - PSY 102 Chapters 3-4 Study...

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PSY 102: Chapters 3-4 Study Guide Definitions: Define sensation: physical response requiring the activation of sense organs by a source of physical energy. Define perception: A psychological response; the sorting out, interpreting, analyzing, and integrating of stimuli by the sense organs and brain. Define an altered state of consciousness (describe how it differs from consciousness): is a brain state wherein one loses the sense of identity with one's body or with one's normal sense perceptions. A person may enter an altered state of consciousness through such things as sensory deprivation or overload, neurochemical imbalance, fever, or trauma. One may also achieve an altered state by chanting, meditating , entering a trance state, or ingesting psychedelic drugs. Define absolute threshold: the smallest intensity of a stimulus that must be present for it to be detected. Define difference threshold: smallest level of added or reduced stimulation required to sense a change in stimulation has occurred. Define monocular cues and binocular disparity: Monocular cues- depth cues; available from the image of only one eye (ex. Motion parallax, relative size of images on the retina, and linear perspective). Binocular disparity- the difference between images seen in the left eye and the right eye. Define insomnia, sleep apnea, and narcolepsy: Insomnia- difficulty falling asleep accompanied by frequent awakenings; occurs in 12-20% adults. Sleep Apnea- disorder in which a person stops breathing while asleep; results in frequent awakenings. Narcolepsy- sudden, irresistible sleep attacks for short periods of time while a person is awake.
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