I If babies play longer with both blue and red fuzzy toys (as opposed to both blue and red smooth toys), then
a. You have a main effect of fuzziness
b. You have a main effect of color
c. You have an interaction between color and fuzziness
d. Fuzziness is a confounding variable and the results can't be believed
Question 2
When two variables interact
a. the effect of one variable depends on the level of the other
b. the main effect cannot be interpreted without discussing the interaction
c. the effect of one variable does not depend on the level of the other
d. both a and b