A psychologist measures the IQs of 20 students who ingested a "smart pill" and 20 students who ingested a "sugar pill" in order to determine if the pill had an effect on intelligence. To ensure peak performance, she tests all of the students on Wednesdays. In this experiment, the independent variable is the
a. day of the week.
b. pill type.
c. IQ score.
d. sex of the researcher.
b
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What would be the goal of a tertiary prevention program for people with intellectual disability?
a. to prevent pregnant women from abusing alcohol b. to deal with the various social and motional difficulties faced by people with intellectual disability c. to encourage the use of amniocentesis d. to reduce the incidence of infectious diseases that can cause intellectual disability
If the programmed cell theory of aging is correct, a. people under stress should die sooner than those not under stress. b. a low-fat diet should extend life
c. the elimination of free radicals should greatly extend life. d. humans are born with a "prewired death clock.".
The best time to learn a second language is in early childhood
Indicate whether this statement is true or false.
A variable that interferes with the relationship between two other variables, X and Y, is which type of variable?