When an interaction effect is present, significant main effects
A) should not be interpreted.
B) should be interpreted, but cautiously.
C) should be interpreted in the usual manner, as they are unaffected by interactions.
D) will never occur.
B
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Which of the following have studies shown to be an effective way of increasing happiness?
a. doing just 50 jumping jacks each day b. trying to be more optimistic c. being reckless with one's obligations and responsibilities d. engaging in downward social comparisons
In hopes of better understanding how glia affect brain repair, Dr. Jennings develops a special mouse lacking specific types of glia. In her experimental design, Dr. Jennings injures the brain of this special mouse and monitors neuronal repair. What is Dr. Jennings likely to observe?
a. Action potentials can no longer propagate in unmyelinated nerves. b. Cell debris from damaged neurons is not cleared. c. A blood-brain barrier is formed in response to the injury. d. Neurons undergo hypermyelination.