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
Question 2Subjects in a verbal learning study learn a list of words and then recall them after varying amounts of time.
The subjects are much more likely to recall the words house, tiger, climb, and paint than they are to recall the words grace, truth, merit, and exert. Which of the following offers an explanation for this finding?
a) The dual coding hypothesi
b) The von Restorff effect
c) The generation effect
d) The depth of encoding hypothesis
Question 3Study 1 investigated the effects of a new medication on blood pressure. The groups included either 40 milligrams of the medication or a placebo.
Study 2 proposes to investigate the same medication in the following groups: 10 milligrams, 20 milligrams, 30 milligrams, or placebo. Study 2 is an example of
a) an extension
b) an expansion.
c) replication.
d) repetition.
Question 4The clearest and most accurate visual information is provided when a relatively
a) small number of receptors activates one bipolar cell
b) large number of receptors activates one bipolar cell.
c) small number of bipolar cells activates rods or cones.
d) large number of bipolar cells activates rods or cones.
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