What is an Interaction?

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*#:Chart 4a shows a Main Effect for the energy drink, with no Interaction
*#:Chart 4a shows a Main Effect for the energy drink, with no Interaction
*#:Chart 4b shows the same Main Effect for the energy drink, but now with an Interaction
*#:Chart 4b shows the same Main Effect for the energy drink, but now with an Interaction
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==Graphical representations of interactions==
==Graphical representations of interactions==
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:::►When an energy bar increases running speed, that is called a "Main Effect" (ME) for the energy bar; and when the energy drink also increases running speed, that is a ME for the energy drink. Chart 1 below shows the graphical result when there are two ME but no Interactions.
 
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Revision as of 03:00, 29 June 2007

Examples


Graphical representations of interactions

NoI2MEc.JPG

I2ME.JPG



Statistical formula behind interactions

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