Question

A school social worker administered a self-esteem test to a group of 9th graders in September. During the school year the students received intensive social work intervention designed to improve their self-esteem. In May the self-esteem test was given again and the self-esteem scores improved. A major problem in this research is that the researcher failed to control for
a. history.
b. maturation.
c. testing.
d. selection biases.
e. all of these.

Answer

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