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Flashcards in Independent ANOVA Deck (8)
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1

Why do we run ANOVAs?

-With each t test there is a 5% chance of saying there is a difference when there really isn’t a difference (p = .050)
 Type 1 error: Falsely rejecting the null hypothesis
 Familywise error: Inflating chance of finding something

2

What is experimental variance?

 Due to experimental manipulation Variability between conditions
-Lots of difference between conditions

3

What is random variance?

- Due to measurement error
 Due to individual differences
 Due to unmeasured variables
 Variability within conditions
-Lots of difference within conditions

4

Planned comaparison - deviation

Compares the effect of each condition (except the first– defined as “reference”) to the overall condition
2 vs 1234
3 vs 1234
4 vs 1234

5

Planned comparison - simple

Compares the effect of each condition to the control (defined as “reference” and “first”) condition
1 vs 2
1 vs 3
1 vs 4

6

Planned comparison - difference

Compares the effect of each condition to the overall effect of all previous conditions
4 vs 321
3 vs 21
2 vs 1

7

Planned comparison - helmert

Compares the effect of each condition to the overall effect of all following conditions
1 vs 234
2 vs 34
3 vs 4

8

Planned comparison - repeated

Compares the effect of each condition to the next condition
1 vs 2
2 vs 3
3 vs 4