RM - Experimental design (AO3)

Question 1

What are the weaknesses of independent groups?

Answer 1

• Participant variables occur as diff. groups complete each condition (ind. diff.s)
• Larger sample required - more time and money

Question 2

What are the strengths of independent groups?

Answer 2

• Fewer order effects as each p only doing 1 condition

- Reduced demand charac.s as unaware of 2nd condition

Question 3

What are the weaknesses of repeated measures?

Answer 3

• Order effects - Do same task more than once and do better/worse due to boredom, fatigue or knowing what to do, confounding variable
• Demand charac.s as ps more likely to realise the aim of the study

Question 4

What are the strengths of repeated measures?

Answer 4

• No effect of p variables as scores compared

- Fewer ps needed - quicker and easier to get sample

Question 5

What are the weaknesses of matched pairs?

Answer 5

• Difficult to obtain well-matched groups

- Time consuming to match ps - less economical

Question 6

What are the strengths of matched pairs?

Answer 6

• Reduced effect of participant variables due to matched charac.s
• No order effects