The endocrine system and the central nervous system may be linked in the etiology of depression through which substance?
a. cortisol
b. dopamine
c. HPA
d. dexamethasone
Answer: a.
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A researcher hypothesizes that children who learn to read using phonics will read better than those not taught in this manner. Identify I0 and Ha. Is this a one- or two-tailed test?
What will be an ideal response?
The fact that most children in the U.S. and Europe have gotten enough food calories to promote growth over the past 150 years or so has resulted in a general increase in
a. their rates of obesity. c. their average weight. b. their average height. d. their bone density
Follow-up research on the risky-shift phenomenon showed that groups do which of the following?
a) Intensify preexisting individual attitudes. b) Make less risky decisions than individuals do. c) Make more conservative decisions than individuals do. d) Make decisions that are counter to the original individual preferences.
High power is desirable in an experiment
Indicate whether the statement is true or false