A male has a thin, frail-looking area on his X chromosome of the 23rd pair. As children, people with this syndrome are typically mildly developmentally delayed but shift to severe or profound developmental delay as adults. This is known as __________.
a. fragile X syndrome
b. Down syndrome
c. fetal alcohol syndrome
d. familial retardation
Answer: a. fragile X syndrome
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Indicate whether the statement is true or false
Young infants' tendency to look preferentially at the outer contours of complete visual stimuli is called the
a. Snellen effect. c. externality effect. b. perceptual differentiation effect. d. selective attention effect.
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a. high b. low c. high, if the task is group-based d. uncertain
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a. meditation c. biofeedback b. humanistic d. behavior