Experimental Design

Question 1

Independent Groups

Answer 1

when every condition within an experiment uses a different group of participants. performance then compared

Question 2

IG Strengths

Answer 2

order effects no problem, less likely to show demand characteristics

Question 3

IG Weaknesses

Answer 3

needs more participants, so more expensive and time consuming, participant variables a problem

Question 4

Repeated Measures

Answer 4

when only one group of pps used

Question 5

RM Strengths

Answer 5

fewer pps so less time and money, participant variable not a problem

Question 6

RM Weaknesses

Answer 6

order effects may cause problems, easier to guess aim of study

Question 7

Matched Pairs

Answer 7

pps are paired together on variables relevant to experimenter, placed in different conditions.

Question 8

MP Strengths

Answer 8

order effects and pp variables not a problem, less likely to guess aim

Question 9

MP Weaknesses

Answer 9

pps never matched perfectly, can be time consuming and expensive

Question 10

Dealing with Order Effects

Answer 10

counter balancing - the participant sample is divided in half, with one half completing the two conditions in one order and the other half completing the conditions in the reverse order.