A study is conducted to investigate the effects of a new exercise program on lam
ID: 3175570 • Letter: A
Question
A study is conducted to investigate the effects of a new exercise program on lameness in race horses. A group of horses at a local race track are selected for the study. The horses are randomly assigned to two groups. Group 1 horses will train according to the new method for one month, then rest for two weeks and then train according to the old method for one months. Group two horses will have the order of old and new methods reversed. Here, each horse serves as its own control. The two groups are necessary to avoid a:
confounded effect. double-blind effect. placebo effect. carryover effect since the order of treatment may influence the subject's response.Explanation / Answer
Option D is the answer
A carryover effect is an effect that "carries over" from one experimental condition to another. Whenever subjects perform in more than one condition (as they do in within-subject designs) there is a possibility of carryover effects. For example, consider an experiment on the effect of rate of presentation on memory
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