LECTURE 7 two way anova

Question 1

what is a factor

Answer 1

a variable that is chosen and manipulated ie gender

between subjects = diff subjects for each level
within subjects = same subjects for each level

Question 2

what is a level

Answer 2

a level of a factor

ie categories - male or female

Question 3

What is a two way anova

Answer 3

two IVs/factors with two or more levels
look for effect of factor a on DV
look for effects of factor b on DV
interaction between a and b on DV

Question 4

what if there is an interaction between the factors

Answer 4

effect of one factor depends on the levels of the second factor - always check for interaction before interpreting main effects as can arise without significance

Question 5

reporting two way

Answer 5

main effect of v 1 F(df,dfr) =__, p=__, n2=___ (x2)

variable interaction = ____+ MSE___

Question 6

Need for two way anova

Answer 6

2+ IV with 2+ levels

Within or between or BOTH