Two-way ANOVA

Description

Two-way ANOVA
Róisín Farmer
Quiz by Róisín Farmer, updated more than 1 year ago
Róisín Farmer
Created by Róisín Farmer about 8 years ago
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Resource summary

Question 1

Question
If there are more levels, there are more comparisons, which increases likelihood of:
Answer
  • Type 1/alpha error (finding significant results when there isn't one)
  • Type 2/beta error (failing to reject the null)
  • Type 1/alpha error (failing to reject the null)
  • Type 2/beta error (finding significant results when there isn't one)

Question 2

Question
If there are more levels, there are more comparisons, which increases likelihood of type 1/alpha error. This is known as:
Answer
  • Familywise error
  • Order effects
  • Cohen's d
  • Pearson's r

Question 3

Question
How can you reduce Familywise error:
Answer
  • Stricter probability
  • Ignoring it
  • Having more levels
  • Using a t-test

Question 4

Question
An ANOVA is an omnibus test, meaning:
Answer
  • It discovers overall difference, not where it lies, reducing Familywise error by conducting 1 test rather than many t-tests
  • Discovers where the difference lies by using Tukey
  • Compares only 2 groups
  • It has nothing to do with main or interaction effects

Question 5

Question
Two-way ANOVA means there are:
Answer
  • Two IV's
  • Only 2 groups
  • One IV
  • Three IV's

Question 6

Question
An example Two-way ANOVA is: impact of gender AND type of exercise ON depression
Answer
  • True
  • False

Question 7

Question
In this last example two-way ANOVA, identify which are predictor variables and which are outcome variables: (3)
Answer
  • Gender: predictor
  • Exercise: predictor
  • Depression: outcome
  • Depression: predictor

Question 8

Question
If gender (predictor 1) has 2 levels (male or female) AND exercise (predictor 2) has 3 levels (cardio, strength, control), this can be described as a:
Answer
  • 3 x 2 design
  • 2 x 2 design
  • T-test
  • One-way ANOVA

Question 9

Question
If both IV's/predictors are between groups = [blank_start]fully between[blank_end] design
Answer
  • fully between
  • mixed
  • fully within
  • silly

Question 10

Question
If 1 predictor is within, and the other is between, it is known as a mixed design
Answer
  • True
  • False

Question 11

Question
If 1 predictor is within, and the other is between, it is known as a fully between design
Answer
  • True
  • False

Question 12

Question
Identify one-way and two-way ANOVA: (2)
Answer
  • One-way = 1 effect with more than 2 levels (IV or DV)
  • Two-way = 3 effects (2 main and 1 interaction)
  • One-way = 3 effects (2 main and 1 interaction)
  • Three-way = 1 effect with more than 2 levels (IV or DV)

Question 13

Question
A three-way ANOVA has 7 effects (3 main, 4 interaction)
Answer
  • True
  • False

Question 14

Question
On SPSS, you'd conduct a two-way ANOVA by:
Answer
  • Analyse - General linear model - Univariate
  • Analyse - Compare means - one-way ANOVA
  • Analyse - Compare means - Independent t-test
  • Analyse - Plots

Question 15

Question
The lower the SD, the..
Answer
  • More accurate model
  • More inaccurate model

Question 16

Question
'3 x 2 x 3' indicates what? (2)
Answer
  • Number of factors by looking at how many numbers (in this example, 3)
  • Number of levels within each factors by looking at the value of each number (e.g. factor 1 has 3 levels)
  • Effect size using Cohen's d
  • The result of a Tukey post-hoc

Question 17

Question
What is a factorial design?
Answer
  • When we have manipulated more than 1 IV/factor
  • When we have manipulated only 1 IV/factor
  • When there is more than 1 DV/outcome
  • Systematic error

Question 18

Question
How many effects in this design?
Answer
  • 2 main, 1 interaction
  • 3 main, 4 interaction
  • 3 main, 1 interaction
  • 2 main, 4 interaction
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