In a(n)___________________ an investigator alters the independent variable.
A) correlational study
B) experimental study
C) single-blind procedure
D) clinical study

Question

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In an experimental study, the investigator deliberately manipulates the independent variable, often by having a control group and an experimental group to measure the effects of the independent variable. A correlational study measures the relationship between two variables but does not manipulate them. A single-blind procedure is when only the participant is unaware of which group they are in, but the researcher still knows which group they are in. A clinical study involves testing medical treatments or interventions on human subjects.

In A(n)___________________ an Investigator Alters the Independent Variable