Mary-Ellen is comparing how mothers discipline children aged one,five,and nine years of age.What type of research is she probably conducting?

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Mary-Ellen is comparing mothers' discipline across different age groups, which suggests that she is conducting cross-sectional research. This type of research involves comparing different groups at the same point in time to identify differences and similarities. Cohort research involves studying a specific group of individuals over a specified period of time, whereas longitudinal research involves collecting data from the same group over an extended period of time. Experiments involve manipulating variables and observing their effects on a particular outcome.

Mary-Ellen Is Comparing How Mothers Discipline Children Aged One,five,and Nine