When a Researcher Says She Is Concerned About Experimenter Bias,what

Multiple Choice

When a researcher says she is concerned about experimenter bias,what is she concerned about?

A) She is concerned about influencing the behavior of the participants because she knows what condition of the study they are in.
B) She is concerned about the outcomes of the study because her next federal grant is dependent upon what happens next.
C) She is concerned about the study because the experimental group and the control group are both receiving placebo controls.
D) She is concerned about the study because the population of interest has been recruited and is the same as the sample.