If a researcher conducts a study in which she directly manipulates a variable of interest to determine its effects on another variable, she is exerting _______ in the research design.
a) contro
b) replication
c) replication with an extension
d) subjectivity
Question 2
An experimental design involves comparing psychology majors and history majors on a measure of study skills and course performance at the end of the semester.
Given that the experimenter is unable to randomly assign students to a major (psychology or history), this is an example of a(n)
a) ex post facto design
b) correlated-samples design.
c) independent-samples design.
d) qualitative research study.
Variable expressivity
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