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After their marriage, patrick and mary anne agreed to participate in a research project that investigated differences in the level of marital satisfaction over time. every five years they had to complete a survey that indicated their marital satisfaction. patrick and mary anne are participants in a:

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I guess the correct answer is Longitudinal study

After their marriage, Patrick and Mary Anne agreed to participate in a research project that investigated differences in the level of marital satisfaction over time. Every five years they had to complete a survey that indicated their marital satisfaction. Patrick and Mary Anne are participants in a Longitudinal study.