A researcher is studying individuals' mental health beginning when the participants are hospitalized in an inpatient psychiatric ward and continuing as the participants receive outpatient therapy
Which of the following could threaten the internal validity of the remaining sample of participants at the end of the study?
a) Mortalit
b) Selection
c) Instrumentation
d) Practice effect
A
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When confronted with the that's–not-all technique, we should always remember that the person making the request ________
a) correctly assumes that we will mindlessly approve of a cost reduction of any item—including a very expensive one b) is trying to give us a "good" deal in order to help us out c) ultimately just wants to gain compliance d) is watching our reactions and will add a bonus only if he or she feels it will work
Suppose you are interested in determining if the volume of the hippocampus is associated with the amount of stress a person was experiencing. Which method would be the best choice?
a. CAT b. fMRI c. PET d. rCBF