Dr.Samuel wants to study the relationship between test anxiety and age.His participants are third-, fourth-, and fifth-graders who will be studied over a three-year period.He does not wish to establish a cause-effect relationship between variables.This is an example of a(n):

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Dr. Samuel's study is a longitudinal study because he is studying the same group of participants (third-, fourth-, and fifth-graders) over a three-year period. He is not manipulating any variables or establishing cause-effect relationships, so it is not an experimental study. It is also not a cross-sectional study, which would involve studying different groups of participants at the same time point, and it is not a case study, which would involve studying a single individual in depth.

DrSamuel Wants to Study the Relationship Between Test Anxiety and Age.His