research methods ; experimental design

experimental design refers to?
way in which pps used n experiments
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INDEPENDENT GROUPS
DFD
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what is this design?
when two separate grps pps exp two different conditions
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what then would happen with performance of two groups?
compared
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IG - EVAL
DGD
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biggest issue is what about pps that occupy different groups?
not the same
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if rsrcher finds mean difference in DV may be more to do with what than IV?
individual differences
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to deal with this problem researchers use?
random allocation
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why are independent groups less economical than repeated measures?
each pp only gives one result
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so what does this mean to produce equivalent data to repeated measures?
twice as many pps
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strength of IG is that what aren't a problem where they are for repeated measures?
order effects
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and pps also less likely to do what?
guess the aim
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REPEATED MEASURES
DFGD
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what does this entail?
all pps exp both conditions
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following what would happen to two sets data?
compared to see if difference
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repeateed measures guarantees?
comparing like with like
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whereas independent groups does what which may be a problem?
compares different groups pps
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RM ; EVAL
DFGDG
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each pp has to do two tasks and what may be sig?
order
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to deal with this researchers often use?
counterbalancing
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what does counterbalancing entail?
half pps doing A then B / half B then A
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why might order effects also arise?
bc repeating tasks could create boredom / fatigue so deterioration perfomrance on second tak
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alternatively performance may improve why?
practice
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therefore order acts as what kind of variable?
confounding
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also more likely pps will do what when exp all cond'?
work out aim
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for this reason what tend to be more of a feature of this than IG?
demand characteristics
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strengths of using repeated measures is that what is ctrlled?
pp variables
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MATCHED PAIRS
DFGD
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what happens here?
pps paired together on variable / variables relevant to experiment
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and then what happens to pairs?
eahc allocated different condition
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attempt ctrl which confounding variable?
pp variables
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and often necessitates use of?
pre-test if matching effective
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so like independent groups but?
pps matched
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MP ; EVAL
DGDFF
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only take pt in single condt so which 2 things less of a problem?
order effects / demand characteristics
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what is the problem with reucing pp variables this way?
never matched exactly
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why may ppl not match?
time consuming / expensive
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which makes htis less what than other designs?
economical
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Other cards in this set

Card 2

Front

INDEPENDENT GROUPS

Back

DFD

Card 3

Front

what is this design?

Back

Preview of the front of card 3

Card 4

Front

what then would happen with performance of two groups?

Back

Preview of the front of card 4

Card 5

Front

IG - EVAL

Back

Preview of the front of card 5
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