Last year, the state increased the speed limit on one section of highway from 55 to 65 mph. To evaluate the effect of the change, a researcher gathered accident reports for six months before the change and for six months after the change. This is an example of a(n) ____
a. time-series design
b. interrupted time-series design
c. cross-sectional design
d. longitudinal design
b
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Indicate whether the statement is true or false
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What will be an ideal response?
Serotonin is synthesized from __________.
A. tyrosine B. tyramine C. tryptophan D. epinephrine
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Question options: unconditioned reinforcers intrinsic reinforcers extrinsic reinforcers token reinforcers