Thursday, November 21, 2019
Prompt Six - On Design Essay Example | Topics and Well Written Essays - 250 words
Prompt Six - On Design - Essay Example This is also referred to as a cross over study. It allows for a comparison of the results arising from different tests performed on the same group of subjects. For example, in a test comparing the effects of a low glycemic load (LGL) diet with a high glycemic load (HGL) diet the same group is fed with a LGL meal in one instance and a HGL meal in another instance. There are advantages and disadvantages to both approaches. In the ââ¬Ëbetween groupsââ¬â¢ approach participants are less likely to become bored as in the ââ¬Ëwithin groupââ¬â¢ approach because they are only used for one treatment. Therefore, they are more likely to entertain follow up treatments than is the case with the ââ¬Ëwithin groupââ¬â¢ approach where participants may not complete the tests. The ââ¬Ëwithin groupââ¬â¢ is less costly when compared to the ââ¬Ëbetween groupsââ¬â¢ approach as it involves only one group on which more than one treatment is administered while the ââ¬Ëbetween groupsââ¬â¢ approach require more than one group. Therefore, the number of participants subjected to tests are half as much as in the ââ¬Ëbetween groupsââ¬â¢ approach. Additionally, the ââ¬Ëwithin groupââ¬â¢ approach is less error prone since the same subjects are used for both tests whiles the ââ¬Ëbetween groupsââ¬â¢ approach is negatively imp acted by individual differences. The effect of the first treatment on the second treatment is a major disadvantage of the ââ¬Ëwithin groupââ¬â¢ approach. The main differences between the two approaches need to be clearly understood in order to facilitate a determination of the statistical tests to be employed so that inferences can be made. Paired t-Tests is useful in analyzing ââ¬Ëwithin groupââ¬â¢ designs while independent t-Tests is useful for analyzing data for ââ¬Ëbetween groupsââ¬â¢
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.