Question

​Dr. Webb designs a research study in which neither the subjects nor the individuals who interact directly with the subjects know which is the control group and which is the experimental group in the study. Dr. Webb probably chose this type of research design in order to

a. minimize the possibility of self-report bias.​
b. reduce the impact of experimenter bias.​
c. ensure that her sample is not biased.​
d. ​avoid the need to obtain ethics approval for the study.

Answer 1

Dr. Webb is using a double-blind research design to reduce experimenter bias, which protects against skewed results due to the researchers' expectations. This approach involves both subjects and researchers being unaware of group assignments.

Step-by-step explanation:

Dr. Webb has likely chosen to use the double-blind method for her research design to reduce the impact of experimenter bias. Experimenter bias occurs when a researcher's expectations might affect the outcome of a study. By keeping both subjects and those who interact with the subjects unaware of the group assignments, Dr. Webb ensures that any interpretations of results are not influenced by prior knowledge of whether the subject is in the control or experimental group. This minimizes any skewing of the data due to preconceived expectations and helps to maintain the integrity of the results. Additionally, using a placebo in the control group helps maintain blinding and allows for a fair comparison to gauge the true effect of the treatment being studied. A double-blind study is a rigorous method that controls for both experimenter and participant expectations.