By age _____, most infants first begin to verbalize events that happened months earlier
a. 6 months
b. 12 months
c. 18 months
d. 2 years
d
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The leading known nongenetic cause of intellectual disability is a. alcohol use by pregnant women
b. marijuana use by the partner of a pregnant woman. c. prenatal exposure to lead-based paints. d. environmental asbestos exposure during pregnancy.
A later evaluation of Piaget's theory concluded that he
a. underestimated the ability of young children. b. underestimated the abilities of adults. c. underestimated the abilities of adolescents. d. borrowed heavily from other stage theories.
Individuals of ______________ descent are most likely to have sickle-cell anemia
a. Asian b. Hispanic c. African d. Native American
What is statistical significance?
a) A criterion used to determine the level of confidence of two groups differing at levels greater than chance b) A criterion used to determine the level of confidence of the null hypothesis being false c) The practical value or importance of the effect of an intervention d) A method for expressing differences between groups in a common metric