To say that a drug has an affinity for a particular type of receptor is to imply that the drug ____.
A. breaks down neurotransmitter chemicals at that receptor site
B. will always excite the postsynaptic receptor
C. will always inhibit the postsynaptic receptor
D. binds to that receptor
Answer: D
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Construct validity is used when
a. a test can be validated against a single criterion. b. we cannot clearly define what we want to measure. c. we want to construct a new test for a specific purpose. d. we draw samples of items from some clearly defined.
Which of the following is the strongest piece of evidence showing that genetic factors influence intelligence (as measured by IQ tests)?
a. Identical twins reared apart are more alike than fraternal twins reared together. b. Fraternal twins reared together are more alike than identical twins reared apart. c. Fraternal twins reared together are more alike than fraternal twins reared apart. d. Identical twins reared apart are more alike than identical twins reared together.
According to research cited in your textbook, four-year-old children who can delay gratification tend to:
A. strive for higher achievement B. get better grades C. select less preferred rewards D. become easily frustrated
Typically, stranger wariness is first noticeable at
3 months. 4 months. 9 months. 12 months.