In the April 27, 2009, issue of The New Yorker magazine, Margaret Talbot describ
ID: 3263827 • Letter: I
Question
In the April 27, 2009, issue of The New Yorker magazine, Margaret Talbot described how a variety of people take drugs intended to treat disorders such as attention deficit hyperactivity disorder, narcolepsy, and epilepsy in an attempt to enhance brain function so that they may function at a higher level. Talbot explained that proponents of this cosmetic use of the drugs argue that the drugs allow people to reach their full potential, whereas critics warn that the drugs have not been tested for these off-label uses and some may be addictive or harmful Consider the results of a study in which a researcher is concerned about the effect cosmetic drug use may have orn incidence of increased blood pressure in horse-racing jockeys. The researcher collected data on how frequently the drugs are used (twice daily or once daily) and the type of hypothetical drugs being used (Fokas, ConcenTrate, and StimuLate) The researcher defines the first factor as the Frequency of Use and the second factor as the Drug Type two thre hree Ar There are factors. Frequency of Use has evels, and Drug type has levels. This is a by design Urr three two or, wree Identify any or all example(s) of a simple effect below: The effect of Fokas is much stronger when taken twice daily compared to once daily, whereas the effect of ConcenTrate is much weaker when taken once daily compared to twice daily Fokas has a greater effect than ConcenTrate regardless of frequency Fokas has no effect at any of the frequencies, ConcenTrate is only effective when taken twice daily, and StimuLate is only effective when taken twice daily compared to once daily The effect of ConcenTrate when taken twice daily is greater than when taken once daily Identify any or all example(s) of a main effect below: when taken twice daily, the effect of Fokas and ConcenTrate is greater than that of StimuLate . The effect of ConcenTrate when taken twice daily is greater than when taken once daily The effect of Fokas is much stronger when taken twice daily compared to once daily, whereas the effect of ConcenTrate is much weaker when taken once daily compared to twice daily Fokas has a greater effect than ConcenTrate regardless of frequency Identify any or all example(s) of an interaction effect below Fokas has no effect at any of the frequencies, ConcenTrate is only effective when taken twice daily, and StimuLate is only effective when taken twice daily compared to once daily The effect of Fokas is much stronger when taken twice daily compared to once daily, whereas the effect of ConcenTrate is much weaker when taken once daily compared to twice daily [] The effect of ConcenTrate when taken twice daily is greater than when taken once daily Taking a drug twice daily is more effective than taking it weekly regardless of which drug is being taken Flash Pfayer WIN 26,0,0,137 Q3 3 34.1 2004-2016 Aplia. Ali nghts reserved. Grade It Now Save & Continue 2013 Cengage Learning except as noted. All rights reserved.Explanation / Answer
There are 2 factors : Frequency and Drug Type.
Frequency of use has 2 levels : twice daily or once daily.
Drug Type has 3 levels : Fakes, Concencentrated and Stimulate
This is a 2 by 3 design
A.
Here, Option 4 is a simple interaction effect
B. A main effect of an independent variable is the effect of the variable averaging over all levels of the other variable(s).
Here, Option 3 and 4 are main effects and essentially mean the same thing
C. An interaction effect exists when differences on one factor depend on the level you are on another factor.
Here, Option 1 is an example of interaction effect