Word: stimuli
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Children who show early signs of being uninhibited carry the same behavioral trait more consistently through their lives. Kagan reports that 30 percent of the children he studied showed an early tendency toward extroversion. At four months of age, these children were not highly reactive to stimuli and exhibited "low crying...
...five years of age, and 70 percent will be extroverted as adults. Kagan said that the behavioral consistency of uninhibited children was due to a lack of intervention on the part of their parents. While parents of shy children place them in therapy that gradually desensitizes them to unfamiliar stimuli, the parents of bold children do not give them similar attention...
Kagan said that shy children, whom he terms "inhibited," and bold children, described as "uninhibited," can be distinguished by their physiological reactions to a series of previously unencountered stimuli...
...gadgets are an offshoot of serious medical research into how visual and auditory stimuli can affect the brain. As it functions, the brain emits energy waves in four frequency ranges called wave states: beta, which is the normal, alert state; alpha, a slower pace noted when people are relaxed and creative; theta, the level just before people doze off, when intense learning can occur; and delta, which is deep sleep...
...wrists. Some nurses report that Cruzan can turn toward persons who speak to her and that she has cried on several occasions, once when a valentine card was read to her. But doctors say she is oblivious to the environment except for reflexive responses to sound and painful stimuli. "We have literally cried over Nancy's body, and we've never seen anything," says her anguished father Joe Cruzan. "Sometimes you swear she is looking right at you, but then you move three or four steps. She has no awareness of herself...