An educational psychologist is examining response times to an on-screen stimulus.  The researcher believes there might be a weak effect from age, but expects a more pronounced effect for different color contrasts.  She decides to examine a black on white (B/W) combination compared to 2 alternatives:  red on white (R/W) and yellow on blue (Y/B).  Here is the data for response times (in milliseconds):

		Color Scheme
		B/W	R/W	Y/B
Age	16–17	5 41 21 29 18 18 17 2	17 2 20 41 18 5 2 22	5 2 11 17 31 26 21 17
	18–19	38 2 36 16 18 40 37 20	19 23 11 24 2 15 16 13	48 31 26 2 39 26 34 34
	20–21	24 17 22 25 2 28 40 19	31 22 43 21 33 29 31 2	31 20 46 42 46 2 39 29

Using SPSS (or similar software), conduct a 2-way fixed-effects ANOVA with $\displaystyle \alpha={0.05}$.  Though not specifically assessed here, you are encouraged to examine the data for normality, outliers, group and marginal statistics, and generate a means plot.  Fill in the summary table:  P-values should be accurate to 4 decimal places and all other values accurate to 3 decimal places.

Source	SS	df	MS	F-ratio	P-value	Partial $\displaystyle \eta^{{2}}$
Age ($\displaystyle {A}$)		2
Color ($\displaystyle {B}$)		2
Interaction $\displaystyle {\left({A}\times{B}\right)}$		4
Error		63

Provide the conclusions for this 2-way ANOVA.

What is the conclusion regarding the main effect for age ($\displaystyle {A}$ or rows): What is the conclusion regarding the main effect for color ($\displaystyle {B}$ or columns): What is the conclusion regarding an interaction effect between age and color ($\displaystyle {A}\times{B}$):