A researcher is interested in studying changes in marital satisfaction over the course of marriage. She hypothesizes that marital satisfaction is highest when couples are newly married, that it decreases during the middle years of marriage, but rises again during later years of marriage. In order to test her hypothesis, she recruits fifty married couples within each of the following conditions: (1) married less than 10 years; (2) married 15-20 years; (3) married more than 25 years. All 150 couples (50 from each condition) complete a standardized measure of marital satisfaction.
If there is a significant change with length of marriage, the researcher would find
A) a large value of the test statistic.
B) a small value of the test statistic.
C) either very large or very small values.
D) There is no way to know the size of the test statistic.

Question

Quizplus · Accepted Answer

If there is a significant change in marital satisfaction over the course of marriage, the researcher would expect to see a large value of the test statistic, indicating a strong effect size. This would provide evidence to support the researcher's hypothesis that marital satisfaction changes over the course of marriage.

A Researcher Is Interested in Studying Changes in Marital Satisfaction