research designs

Question 1

what is independent measures

Answer 1

ppts only take part in one condition so requires 2 separate groups

Question 2

strengths of independent measures

Answer 2

-avoids order effects as ppts wont become bored or tired so more valid
-less chance of demand characteristics as ppts is less likely to know the aims if they only do one condition

Question 3

weaknesses of independent measures

Answer 3

-more people are needed due to separate conditions so more time consuming
-may be partcipant variables which confound results=less valid

Question 4

what is repeated measures

Answer 4

one group of ppts takes part in both conditions

Question 5

strengths of repeated measures

Answer 5

-avoids ppt variables=more valid
-fewer people needed=less time consuming

Question 6

weaknesses of repeated measures

Answer 6

-demand characteristics are more likely=easier for ppts to quess aims and alter their behaviour
-order effects are likely to occur=reduces validity

Question 7

what is a matched pairs design

Answer 7

particpants are matched in each condition for characteristics that may have an effect on their performance e.g IQ,

Question 8

strengths of matched pairs

Answer 8

-avoids ppt variables =valid
-avoids order effects
-less chance of demand characteristics

Question 9

weakness of matched pairs

Answer 9

-hard to find appropriate matches=time consuming and may still be ppt variables
-requires more ppts=time consuming