Professor Smith has been studying the development of moral reasoning in a group of subjects over the last 30 years.All of her subjects were 1 year old when she began her study.She intends to hand off her study to a younger researcher in the department after she retires next year.Professor Smith is conducting a

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Professor Smith's study is a longitudinal study because she has been following the same group of subjects over a long period of time to observe the development of moral reasoning. A fluid study would involve constantly changing subjects, a cross-sectional study would involve comparing groups of subjects at different ages, and a cohort study would involve comparing groups of subjects with a shared characteristic (such as being born in the same year).

Professor Smith Has Been Studying the Development of Moral Reasoning