Name the five stages of sleep
What will be an ideal response?
ANSWER:
Stage I sleep is a light sleep and is characterized by theta waves. During this stage, your breathing and heart rate slow down. You may experience sensations such as falling or floating. You can easily awaken from stage I sleep, which typically lasts from 1 to 7 minutes.
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Stage II sleep is characterized by sleep spindles and lasts approximately 20 minutes. Sleep spindles are a pattern of slower theta waves sporadically disrupted by bursts of electrical activity. During stage II sleep, breathing, muscle tension, heart rate, and body temperature continue to decrease. You are clearly asleep and not easily awakened. Research suggests that stage II sleep spindles help us process both simple and complex motor skills that we have learned.
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Stages III and IV sleep are referred to as slow-wave sleep. In stage III sleep, you begin showing delta brain-wave patterns. Delta waves are large, slow brain waves. When a consistent pattern of delta waves emerges, you have entered stage IV sleep. Stage IV sleep is referred to as deep sleep. The body is extremely relaxed. Heart rate, respiration, body temperature, and blood flow to the brain are reduced. Growth hormone is secreted. It is difficult to awaken people from deep sleep. When they are awakened, they may be disoriented or confused. It is believed that during this deep sleep, body maintenance and restoration occur
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After approximately 30–40 minutes of slow-wave sleep, your brain and body start to speed up again. You cycle back through stage II of non-REM sleep and then enter REM (rapid-eye-movement) sleep. REM sleep is a very active stage. Your breathing rate increases, and your heart beats irregularly. Blood flow increases to the genital area and may cause erections in males. However, your muscle tone significantly decreases, leaving the muscles extremely relaxed and essentially paralyzed. REM sleep is intimately connected to dreaming. Although you can dream in some form in all sleep stages, dreams during REM sleep are more easily recalled. More than 80% of people awakened from REM sleep report dreaming.
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In research, _______________ is the process of selecting units for study from a population of interest
Fill in the blank(s) with correct word
19. "I wonder why Jim is so mean to Louise," Mary commented to Sheila over coffee. "Maybe other people have always been mean to him, and so he is really angry all of the time
Maybe that makes him treat Louise badly, even though they are supposed to be in love," replies Sheila. According to the scientific method, Sheila has just posed a ________. a. theory b. problem c. hypothesis d. relative truth
Locke regarded development as __________ and largely influenced by __________
A) continuous; nature B) continuous; nurture C) discontinuous; nature D) discontinuous; nurture
What statement is most true regarding response expectancy paradigms?
A) Anticipation speed refers to how quickly an infant will look at an object that has just appeared in their field of vision. B) Response expectancy and habituation paradigms essentially assess the same competencies. C) To study response expectancies, the researcher creates a patterning of responses and records how quickly the infant will glance in a direction in anticipation of an object. D) Unlike habituation speed, response expectancy abilities are not well tied to later intellectual abilities.