Twelve-year-old Jon has been suspended from middle school several times and has exhibited behavioural problems beginning in kindergarten. A pediatrician learns that his parents were heavy users of drugs and alcohol before and for a year after Jon's birth. Examining the child's medical records, she learns that Jon had a normal birth weight but has exhibited cognitive deficits his entire life. The
pediatrician would be most likely to conclude that Jon's behavioural problems are due to prenatal exposure to which drug?
A) tobacco
B) alcohol
C) heroin
D) methadone
B) alcohol
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In a friendly game of horseshoes, you would expect a person high in achievement motivation to choose to stand
a. very close to the target. b. a moderate distance from the target. c. very far from the target. d. either very close to or very far from the target.
If other factors are held constant, what is the effect of increasing the sample variance?
a. It will increase the estimated standard error and increase the likelihood of rejecting H0. b. It will increase the estimated standard error and decrease the likelihood of rejecting H0. c. It will decrease the estimated standard error and increase the likelihood of rejecting H0. d. It will decrease the estimated standard error and decrease the likelihood of rejecting H0.
A cohort is a(n)
a. control group b. experimental group c. nonequivalent control group d. group of subjects that has something in common, such as year of birth
The thin layer of cells that cover the surface of the forebrain is called the:
a. cortex c. cerebellum b. myelin sheath d. thalamus