A researcher wants to study the effects of music and sugar consumption on a test
ID: 3392080 • Letter: A
Question
A researcher wants to study the effects of music and sugar consumption on a test of attention. He randomly assigns participants to six conditions: sugary drink + music with vocals, sugary drink + music without vocals, sugary drink + no music, non-sugary drink + music with vocals, non-sugary drink with music without vocals and non-sugary drink with no music. He then gives every group a computerized test of attention and measures their accuracy.
He gets the following data (numbers in cells represent individual participants):
Music with vocals
Music without vocals
No Music
sugary drink
70, 80, 90, 100
75, 85, 95, 100
75, 80, 95, 90
Non-sugary drink
30, 40, 50, 50
70, 80, 90, 95
75, 80, 95, 90
What are the two factors? How many levels does each have?
Enter the data and run a two-way ANOVA. First, what are the means for each of the six cells above?
Is the homogeneity of variance assumption met?
Report the F statistic for the main effect of drink type, the F statistics for the main effect of music type, and the F statistic for their interaction. Which are significant?
Look at the graph of the interaction. Interpret the interaction.
Report results in APA style.
Music with vocals
Music without vocals
No Music
sugary drink
70, 80, 90, 100
75, 85, 95, 100
75, 80, 95, 90
Non-sugary drink
30, 40, 50, 50
70, 80, 90, 95
75, 80, 95, 90
Explanation / Answer
A researcher wants to study the effects of music and sugar consumption on a test
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