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Hannah and Elizabeth Are 18-Year-Old Twins

Question 83

Multiple Choice

Hannah and Elizabeth are 18-year-old twins.Every year since they were born,they have participated in a research project.A researcher contacts them annually,and they complete a battery of psychological tests.They are participating in a:


A) one-time,one-group study.
B) longitudinal study.
C) cross-sectional study.
D) descriptive study.

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