Experimental Design

Question 1

what is repeated measures design

Answer 1

one single group of participants perform all the conditions of the experiment, a comparison is made between a single participants score on one condition to the other

Question 2

strengths of repeated measures design

Answer 2

• same individuals so when comparing results there are no participant variables
• smaller sample so cheaper and easier

Question 3

limitations of repeated measures design

Answer 3

• order effects
• demand characteristics as they are more likely to workout the aims of the experiment by being in both conditions

Question 4

what is independent groups design

Answer 4

different groups of participants each perform one condition of the IV and the scores of one group in one condition are compared to those in the other

Question 5

strengths of independent groups design

Answer 5

• demand characteristics and order effects are less likely as the participants only take part in one condition

Question 6

limitations of independent groups design

Answer 6

• larger sample required which is more costly and time consuming
• participant variables

Question 7

what is matched pairs design

Answer 7

where you air your participants up on a certain characteristics which is believed to affect the performance on the DV, each person from the pair does one condition and results are compared to their partner

Question 8

strengths of matched pairs design

Answer 8

• reduced participant variables
• no order effects

Question 9

limitations of matched pairs design

Answer 9

• most time consuming design
• larger sample required
• there will still be participant variables