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	29 5 18 18 41 17 2 21	17 18 20 5 2 2 22 41	33 13 7 19 23 19 28 2
	18–19	38 18 37 16 2 20 36 40	15 23 2 14 22 12 10 18	27 40 35 49 32 27 3 35
	20–21	17 40 25 24 19 28 22 2	29 19 41 29 27 20 2 31	3 32 47 21 40 47 43 30

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 ($\displaystyle {A}\times{B}$):