Experimental Design

Question 1

What are the 3 experimental designs

Answer 1

independent measure
repeated measures
matched pairs

Question 2

define independent measures

Answer 2

p.t. allocated to one condition and only taking part in that condition

Question 3

whats the use of independent measures

Answer 3

to compare one group up against the other to see which is better

e.g drug therapies

Question 4

advantages of independent measures

Answer 4

-not subject to order effects
-reduced chance of demand characteristics

Question 5

disadvantages of independent measures

Answer 5

-easily affected by participant variables
-requires a large amount of participants

Question 6

define repeated measures

Answer 6

-same participants used in each condition

Question 7

Why use repeated measures

Answer 7

when you wish to compare a groups performance before and after

Question 8

advantage of repeated measures

Answer 8

-participant variables between conditions and eliminated
-fewer participants are used, less time needed

Question 9

disadvantage of repeated measures

Answer 9

-subject to order effects
-increased chance of demand characteristic’s

Question 10

define matched pairs

Answer 10

participants are matched closely and then pairs are randomly allocated to conditions

Question 11

when to use matched pairs?

Answer 11

when a researcher has a lot of time and money as participants must be matched closely

Question 12

advantages of matched pairs

Answer 12

-not subject to order effects
-good attempt at controlling participant variables

Question 13

disadvantages of matched pairs

Answer 13

-difficult to match pairs exactly
-requires a large number of participants
-time consuming, costly and impractical for effective matching