Sol is investigating the effects of divorce on children's self-esteem.His initial sample consists of a group of 10 five-year-olds,which he plans to follow over a period of at least 15 years.When this group of children reaches age 15,Sol adds a second group of five-year-olds to his study,and plans to follow them for another 15 years.Sol's overall plan is best classified as a _____ research design.

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Sol's research design is sequential because it combines elements of both longitudinal and cross-sectional designs. He starts with a longitudinal study by following a group of children over a long period. Then, by adding a new cohort of children after some time, he introduces a cross-sectional element, comparing different age groups at one point in time.

Sol Is Investigating the Effects of Divorce on Children's Self-Esteem