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Psychology
Research methods
Experimental design
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Created by
Imaan
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Cards (5)
Repeated measures design
all
Ps
partake in all
conditions
Strengths
P variables are less of a
problem
less Ps
needed
, so less time consuming
Weaknesses
order of tasks can
influence
results
more likely to work out
aims
if they do all conditions and so can result in demand
characteristics
Independent Measures
diff groups of
Ps
for each
condition
Strengths
reduce
possibility
of demand characteristics compared to a
repeated design
as Ps only do one condition
Weaknesses
P variables are a greater issue
time consuming as the same amount of data must be generated for each
participant
Matched pairs
Ps are paired on key variables that affect the DV
Strengths
Ps take part in one
condition
, so demand characteristics are less of a problem , as well as order effects
P variables are less of a problem as they are matched to another person
Weaknesses
hard to match Ps exactly
time consuming to match
Order effects
the order that tasks are done in may affect results
to control, use
counterbalancing
Ps
are split into two groups
one completes one condition first, the other will do condition two and then switch
Participant variables
minimised by adding
random allocations
to
conditions
placing names in a hat