Multiple Choice
A group of researchers conduct a study where children from particular classrooms are assigned to treatment or control conditions. After the study, the researcher finds out that the students in the control group are higher achievers than those in the experimental group. He found no treatment effect. The failure to find a treatment effect might be due to:
A) A treatment effect
B) A testing effect
C) A differential selection effect
D) A maturation effect
Correct Answer:
Verified
Correct Answer:
Verified
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