You have just learned of survey results conducted by your university on the drinking behaviors of the college campus.
Wondering about the results, you ask yourself the following questions: how were participants selected, were participants selected depending on if they lived on- or off-campus, were all the participants in a sorority or fraternity, were nontraditional age students included in the survey, and were men and women equally sampled? These types of questions indicate that you are concerned about what threat to internal validity?
a. history
b. selection
c. maturation
d. regression to the mean
Question 2
A participant dropping out of a study or not returning to complete additional parts to a study is known as __________.
a. attrition.
b. mortality.
c. fatigue.
d. carry over effects.
Examples of the results of sexual selection, a type of natural selection.
Iowa State University's Tornado/Microburst Simulator
Aneurysm. Photograph of the aorta, the large blood vessel arising from the heart, with a large bulge
National Sleep Foundation Survey Results
Monitoring and Following Up on Laboratory Test Results
Predictions for the results of mutation of an overlapping and a nonoverlapping genetic code