A veterinarian was concerned about the link between dog food ingredients and rising rates of obesity among dogs and decided to do a study. She began by randomly assigning ten dogs of different breeds to two groups. The dogs in one group were given additive-free food made with organic ingredients. Those in the other group were given conventional dog food. Six weeks later, the veterinarian weighed the dogs and compared the two groups. Why did the veterinarian randomly assign the dogs to groups?
a. It was the easiest way to assign the dogs to groups.
b. to be certain that the results would apply to all breeds of dogs
c. to minimize differences between the two groups that might affect their weights
d. so that the results could be published in a scientific journal
Answer: c. to minimize differences between the two groups that might affect their weights
You might also like to view...
Characteristic of the field of social psychology today include all of the following except
a. an interest in the way cognition and motivation interact. b. a focus the role of culture in shaping behavior. c. an integration of biological and social perspectives. d. a concern for the lack of ethical standards in research.
One CANNOT reduce problems of ceiling and floor effects by
a. avoiding the use of tasks that are too easy. b. avoiding the use of tasks that are too difficult. c. testing pilot participants to make sure that performance on a task will not be near the extremes of the scale. d. making sure that pilot participants get nearly perfect scores when they are not being subjected to the experimental manipulation.
Alzheimer's disease appears to be caused by
a. the general shrinkage and atrophy of the brain due to aging. b. circulatory problems that cause repeated strokes that damage the brain over time. c. unusual webs and tangles in the brain. d. a combination of depression and the dangerous interaction of medications.
Most people are highly susceptible to hypnosis
Indicate whether the statement is true or false