Week 1

Question 1

What are statistics used for?

Answer 1

To gain insight into patterns that allow us to make inferences about psychological behaviour

Question 2

What is a p value?

Answer 2

The probability that the null hypothesis is true, the likelihood of an effect being the result of chance

Question 3

What are confidence intervals?

Answer 3

The degree to which an effect might be found in a population

Question 4

What are inferential statistics?

Answer 4

A way to generalise from a sample to a population

Question 5

What is a between participants design?

Answer 5

Compares the performance of different PPs assigned to one experimental condition
May suffer from individual differences

Question 6

What is a within participants design?

Answer 6

Compares the performance of the same PPs across all experimental conditions
Requires counterbalancing

Question 7

Outline the independent t-test

Answer 7

Between Subjects design
Categorical IV and Continuous DV
Nonparametric equivalent: Mann-Whitney U

Question 8

Outline the paired t-test

Answer 8

Within Subjects design
Categorical IV and Continuous DV
Nonparametric equivalent: Wilcoxon Signed Ranks test