Experimental Designs

Question 1

What is an independent group experiment?

Answer 1

When there are 2 groups and they each are investigated with different conditions with random allocation

Question 2

Adv of independent group exp

Answer 2

. No order effects as it is only tested once meaning no practice would be done and there won’t be any fatigue
. Will not guess aim as it has only been tested once so they will name natural behaviour

Question 3

Disadv for independent group exp

Answer 3

• Participant variables as there are different participants in each group
. More participants are needed ( twice as man) as repeated measures

Question 4

What is a repeated measures exp?

Answer 4

When each participant does all the conditions of the iv , counterbalancing to avoid order effects

Question 5

Adv of repeated measure exp

Answer 5

. No participant variables as they are the same people & controls ev/cv
. Fever participants half of the independent groups)

Question 6

Disadv of repeated measures

Answer 6

. There are order effects- similar tasks are done twice which can cause fatigue, ev/ cv
. Easier to guess aims to both conditions and change behaviour

Question 7

What are matched pairs experiments?

Answer 7

When there are 2 seperah groups but the participants are paired based on participant variables

Question 8

Adv of match pairs

Answer 8

. No participant variable as thy are reduced through matching
. No order effects as they are rested once meaning there is no practice fatigue
. More people so more representative as a whole

Question 9

Disadv of matched pairs

Answer 9

. Imperfect matching - takes time,not all relevant variables
. More participants needed
.although more participants, when put into pairs it is less representative of that variable