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):

Longitunidal Study.

Explanation: A longitundinal study is a research design in which the researcher studies and observes the behavior of the same variables (Could be people, traits, characteristics) over periods of time.

In this case, 1- Dr. Samuel wants to study relationship between variables 2- does not wish to establish a cause-effect relationship, but indeed, 3- he is conducting the study over a three year period with the same participants. Therefore, it is a Longitudinal Study.

a.. a conflict between her competing identities.. apex