Lesson 7: Experimental design

Question 1

What is standardisation?

Answer 1

Using the exact same procedures for all participants in the study for reliability.

Question 2

What is independent group design?

Answer 2

Different participants are used in each of the conditions, randomly allocated to each condition

Question 3

Advantages of independent group design

Answer 3

1. no order effects

2. no demand characteristics

Question 4

Disadvantages of independent group design

Answer 4

1. More participants are needed

2. Individual differences

Question 5

What is repeated measures design?

Answer 5

Each participant is tested in all conditions of the experiment

Question 6

Advantages of repeated measures design

Answer 6

1. no individual differences

2. half as many participants are needed compared to independent group design

Question 7

Disadvantages of repeated measures design

Answer 7

1. Order effects could effect the results, could be avoided by counter balancing (condition A, condition B and then switch)
2. Demand characteristics more likely

Question 8

What is a matched pair design?

Answer 8

Different participants are used in all of the conditions, but based on there characteristics so it’s even.

Question 9

Advantages of matched pair design

Answer 9

1. Less risk of order effect

2. Individual differences are less likely

Question 10

Disadvantages of matched pair design

Answer 10

1. Twice as many participants are needed compared to repeated measures
2. Difficult and time consuming