A researcher notices that many products sold in the United States depict famous
ID: 3228320 • Letter: A
Question
A researcher notices that many products sold in the United States depict famous people or characters. To determine whether this actually influences how much children like these products, the researcher gave children a block of wood. On the top of the block of wood was a sticker of a superhero, a parent, a teacher, or no person at all (just a plain colored sticker). Children were allowed to handle each block of wood for 2 minutes and then were asked to rate how much they liked each block of wood on a pictorial scale similar to the one shown (adapted from Bradley & Lang, 1994). These types of scales are typically used with children because faces are familiar to them. Higher ratings indicated greater liking. Given the following data, test whether liking for the block of wood varied by the type of sticker at a .05 level of significance (two-tailed).
Type of Reinforcement
Superhero
Parent
Teacher
Plain Sticker
4
5
5
3
3
5
4
1
4
4
5
3
4
4
5
5
5
3
4
5
5
4
3
3
4
5
5
1
3
4
3
2
4
1
4
3
5
4
3
4
4
5
4
3
5
4
3
4
4
4
5
1
5
5
4
5
*SPSS OUTPUT:
What is the proportion of variance partial eta-squared (R2) for the repeated measures ANOVA? How did SPSS calculate this? State the % change in the variable and size of the effect for the test as small, medium, or large.
Type of Reinforcement
Superhero
Parent
Teacher
Plain Sticker
4
5
5
3
3
5
4
1
4
4
5
3
4
4
5
5
5
3
4
5
5
4
3
3
4
5
5
1
3
4
3
2
4
1
4
3
5
4
3
4
4
5
4
3
5
4
3
4
4
4
5
1
5
5
4
5
Within-Subjects Factors Measure MEASURE 1 Dependent Stickers Variable Superhero Parent Teacher PlainExplanation / Answer
From SPSS output,
ETA squared value 'r^2' = 0.983
Since it is obtained for overall regression output.
98.3% change in the variable and size of the effect for test as small, medium and large
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