Variables related to ________ are potential threats to the internal validity of every study.
A) time between treatments
B) pretest sensitization
C) fatigue and practice
D) the environment of the study

Question

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The Answer of Variables related to ________ are potential threats to the internal validity of every study.
A) time between treatments
B) pretest sensitization
C) fatigue and practice
D) the environment of the study

Variables Related to ________ Are Potential Threats to the Internal