About variables

Review for today’s quiz (December 8, 2009)

We'll go over this material, then you'll take a quiz, then we'll get to the new material in chaps 8 and 9

What’s an independent variable?

What’s a dependent variable?

What’s an extraneous variable?

How do you control for an extraneous variable to see if it’s really what might be the reason a particular variable is significant?

What’s a spurious relationship?

What’s a mediating variable?

What’s a moderating variable?

What do strength and direction mean?

Start with a direction, name one, give an example

Now strength, example

What’s another name for a negative relationship?