Single-Factor Between-Subjects ANOVA Week 9

Question 1

How many groups does ANOVA measure?

Answer 1

Three or more

Question 2

What research question does ANOVA test?

Answer 2

Is there a significant difference between means?

Question 3

Describe an independent groups design

Answer 3

Each participant is one level of the IV, only participating in one condition e.g either control or drug

Question 4

What is the purpose of post-hoc tests?

Answer 4

To see WHERE the differences lie

Question 5

List the designs where ANOVA can be used

Answer 5

• independent
• repeated measures
• mixtures of independent and repeated measures

Question 6

What is the ANOVA statistic?

Answer 6

The F-statistic

Question 7

What is F under the null hypothesis?

Answer 7

1

Question 8

What is the underlying logic of the F-statistic?

Answer 8

individual differences and experimental error

Question 9

What would be an alternative hypothesis for ANOVA?

Answer 9

At least one of the means is different from the rest

Question 10

If ANOVA is less than .05, …….

Answer 10

There is a significant difference between the means

Question 11

When would you use a post hoc test?

Answer 11

After you have found a statistically significant F/ANOVA

Question 12

How do you calculate degrees of freedom for ANOVA?

Answer 12

either number of groups - 1
OR
(number of groups in each group) - 1 x number of groups

Question 13

What is homogeneity of variance role in ANOVA?

Answer 13

Looks at the means across all groups and how much they deviate from the overall mean.

Question 14

What does ANOVA tell you?

Answer 14

If there is a significant difference between means, but does not tell you where it comes from

Question 15

Who invented ANOVA?

Answer 15

Sir ronald fisher

Question 16

List the most commonly used post hoc tests

Answer 16

Turkey Honestly Sig. Diff
Newman-Keuls
Scheffe
Fishers least significant difference

Question 17

What does between subjects mean?

Answer 17

Each person/group only participates in one group/level of the independent variable e.g one group does method of loci, one group does mnemonics….

Question 18

What does within subjects mean?

Answer 18

Each group/person participates in EVERY level/group of the IV e.g each person goes through each memory technique to see which is the best

Question 19

Between-subjects is also known as

Answer 19

Independent groups design

Question 20

How many degrees of Freedom does the F test have?

Answer 20

2