Week 7 Within Subject Design

Question 1

State some reasons why a within subjects design would be used?

Answer 1

• Requires fewer subjects
• Convenient
• More sensitive than independent groups designs
• Some areas require within subjects (longitudinal design)

Question 2

Disadvantages of within subjects design?

Answer 2

• Demand characteristics
• Practice effects
• Carry-over effects
• Attrition

Question 3

What happens when individual difference has been removed?

Answer 3

F-ratio denominator will be smaller and therefore F stat will be bigger.
(MSW smaller = Larger F)