Lecture 7

Question 1

What does a single-factor involve?

Answer 1

One treatment/independent variable. (Also written one-way)

Question 2

F ratio is formed by dividing _____-____ variability by within-group variability.

Answer 2

Between-group

Question 3

What does a within-subjects design entail?

Answer 3

Each subject received all treatments

Question 4

What’s an advantage of within-subjects design?

Answer 4

A source of error is removed: individual differences between-groups. There can be no individual differences between groups when the same subjects are in each group.

Question 5

What are problems with within-subjects design?

Answer 5

Drop out, and practise/order/carry-over effects.

Question 6

Make sure that different subjects receive the treatments in different orders. This garantees that any order effect is at least _______ rather than _____, but it does not remove the overall problem.

Answer 6

Randomised; systematic.