Why is it important for experiments to be externally valid?
a. so that we know that the results of our studies have significance beyond the situation in which they were conducted.
b. so that we know which variables influence which other variables.
c. so that others do not have to duplicate our work later.
d. so that we can control extraneous variables
Question 2
When looking at information on the web for your literature review, which of the following should NOT be important to validate the information?
a. author credentials and email address
b. peer-reviewed references
c. author's opinions
d. preferred domains such as .edu, .gov, or .org
Coleman's parabiosis experiments revealed a satiety factor in wild-type mice that was absent or
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