Evaluation of experimental design

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disadvantage of independent groups
is that participants who occupy the different groups are not the same. their might be individual differences.
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advantages of independent group
order effects are not problem as participants are taking part in one condition. participants are less likely to guess aims
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problems of participant variables in an independent group design
participants should be randomly allocated to the different experimental conditions. Random allocation attempts to evenly distribute participant characteristic across the condition of the experiment. Names in hat. cage bingo balls. technology random
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weaknesses of repeated measures
order effects arises repeating two tasks could create boredom or fatigue that may cause deterioration in performance on task. more likely participants will work out the aims of the study. demand characteristic is a feature.
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Strength of repeated measures
Less participants because they are doing both conditions. participant variables are controlled and fewer participants needed.
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deal with problems in repeated measures
counterbalancing this controls order effects.in counterbalancing, half participants take part in condition A then B and other half take part in condition B then A.Counterbalancing does not remove or prevent order effect BUT attempts to balance effect
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strength of matched pairs
only take part in single condition so order effects and demand characteristic are less problem
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weakness of match pairs
participants can never be matched exactly. even when identical twins are used as matched pairs. there will still be important differences between, affect DV. matching= time consuming and expensive, especially pre-test required= less economical
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Other cards in this set

Card 2

Front

order effects are not problem as participants are taking part in one condition. participants are less likely to guess aims

Back

advantages of independent group

Card 3

Front

participants should be randomly allocated to the different experimental conditions. Random allocation attempts to evenly distribute participant characteristic across the condition of the experiment. Names in hat. cage bingo balls. technology random

Back

Preview of the back of card 3

Card 4

Front

order effects arises repeating two tasks could create boredom or fatigue that may cause deterioration in performance on task. more likely participants will work out the aims of the study. demand characteristic is a feature.

Back

Preview of the back of card 4

Card 5

Front

Less participants because they are doing both conditions. participant variables are controlled and fewer participants needed.

Back

Preview of the back of card 5
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