'Control' in research design involves developing a strong problem statement and maximizing error for better understanding of variable associations. It also pertains to minimizing the fidelity of an intervention and the effects of extraneous variables to assess the true impact of an intervention on outcomes.

1. What does "control" in research design mean?
1.Control means developing a strong problem statement.
2.Control means maximizing error to better understand the association between the study
variables of interest.
3.Control refers to minimizing fidelity of an intervention
4.Control refers to minimizing the effects of extraneous variables to better understand the impact
of an intervention on an outcome.
5. None of the above