interaction

[Erida]

Hi...
I need some help with the basics...
What is meant by an interaction in an experiment?
And... Can you please tell me a link where I can find examples of experiments that have between-subjects, within-subjects and mixed designs.

Thank you very much, people!

[dml]

I have two sites that may be of help:
http://davidmlane.com/hyperstat/within-subjects.html

and

http://psych.rice.edu/online_stat/
(see chapter XII, section G)

Hope this helps.

[JohnM]

Hi...
I need some help with the basics...
What is meant by an interaction in an experiment?
And... Can you please tell me a link where I can find examples of experiments that have between-subjects, within-subjects and mixed designs.

Thank you very much, people!

Erida,

As an example, let's say we have an experiment with two factors, A and B, each at two levels - so this would be a 2x2 design.

An interaction between factors A and B would mean that the effect of factor A would depend on the level of B, or vice versa-
the effect of factor B would depend on the level of A.

JohnM

[Erida]

Thank you so much, John! You really saved me.

Have a great day!