A psychologist wants to compare heterosexual women with lesbian women with respect to the length of time a love relationship lasts. She decides to compare 100 heterosexual women who are married with 100 lesbians who are currently in a love relationship. Without knowing anything more about this study, what might you suspect to be an important confounding variable?
a. The dependent variable is not clearly specified.
b. The heterosexual women are in a legally sanctioned relationship, whereas the lesbian women are not.
c. The study includes no male participants.
d. It is difficult to recruit participants for a study like this.
Question 2
Imagine that a group of researchers want to determine whether there are gender differences in people's definition of an ideal friend. They distributed an identical questionnaire to females in 2010 and to males in 2011 . Which of the following would be a confounding variable in this study?
a. the gender of the participants
b. the items on the questionnaire
c. the operational definition of friend
d. the year in which the questionnaire was distributed
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