Question

the independent variable is:

what a researcher is going to measure.

the condition that the researcher manipulates.

the group that does receive the treatment being studied.

the group that receives the placebo.

must be testable.

Explanation:

To determine the independent variable, recall its definition: the variable that the researcher manipulates or controls in an experiment to observe its effect on the dependent variable. Let's analyze each option:

• "What a researcher is going to measure" describes the dependent variable (the outcome being measured).
• "The condition that the researcher manipulates" matches the definition of an independent variable.
• "The group that does receive the treatment being studied" refers to the experimental group, not a variable.
• "The group that receives the placebo" refers to the control group (with placebo), not a variable.
• "Must be testable" describes a hypothesis, not a variable.

Answer:

B. The condition that the researcher manipulates.