Questions below will be based on the following: A researcher was interested in discovering whether attitude changes can be more effectively brought about when persons are made to feel part of the decision making process. A group of women was selected and randomly assigned to one of two groups, one group being placed in a large lecture hall, and the other in a small discussion-group setting. In the lecture setting, a speaker exhorted the women to use less expensive cuts of meat, whereas in the small-group setting a different group leader, although raising the same issues as the lecture had, also encouraged the subjects to participate in the discussion and offer suggestions, Several weeks later both groups of women were checked at home to determine whether they were indeed using the meat cuts which had been urged. Only 3% of the lecture group members had the meat cuts, whereas 32% of the discussion group members had the meat cuts. The difference was clearly significant.
-The fact that the two groups were led by different persons created the possibility of incurring
A) the Type 2 error
B) the halo effect
C) the Hawthorne effect
D) confounding variables

Question

Quizplus · Accepted Answer

The different group leaders in each group could have introduced confounding variables, such as their different communication styles or levels of rapport with the participants. This could have influenced the results and made it difficult to determine the true cause of the difference in meat cut usage between the two groups.

Questions Below Will Be Based on the Following: a Researcher