Experimental Design

Question 1

What is a repeated measures design?

Answer 1

It involves using the same individuals and testing them under two or more conditions

Question 2

What is two strengths of a repeated measures design?

Answer 2

It controls differences between participants and it requires fewer participants

Question 3

What are two limitations of a repeated measures design?

Answer 3

Demand characteristics and order effects (performance in 2nd is affected by performance in 1st due to practice, boredom or fatigue)

Question 4

How can order effects be overcome?

Answer 4

By using counterbalancing 50%-A then B then 50%-B then A

Question 5

What is matched participants design?

Answer 5

It involves using different participants for each condition but matching them up on a characteristic

Question 6

What are two strengths of a matched participants design?

Answer 6

It eliminates order and practice effects and reduces individual differences

Question 7

What are two limitations of a matched participants design?

Answer 7

It may be impractical as matching is time consuming and you may need a large number of participants

Question 8

What are independent groups design?

Answer 8

It involves using different individuals in each condition and participants are randomly assigned to a group

Question 9

What are two strengths of independent groups design?

Answer 9

It can be used in cases where repeated measure designs cannot be used and there are no order effects as they only complete one condition

Question 10

What are two limitations of independent groups design?

Answer 10

There may be important differences between the two groups and you need to find a fairly large sample