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
Polyploidy has been an important factor in the evolution of plants.
Wilson and Simberloff's experiments on the equilibrium model of biogeography.
The traits Mendel used in his experiments, and the results of the F1 and F2 generation crosses.
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Important Concepts in Clinical Massage Therapy
Controlled Scientific Experiments Scientists use experimental research to test hypotheses