different participants in each condition of the experiment. ADVANTAGE: no problem with order effects which may happen when participants take part in two or more experimental conditions.
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repeated measures
every participant is exposed to each experimental condition, so in effects participants are used as their own control group
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matched pairs
each group of participants is carefully matched on all the variables considered to be relevant to the experiment
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null hypothesis
predicts that the results of an experiment can be explained by chance variation rather than by the manipulation of the independent variable. it predicts that the alternative hypothesis is not true
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alternative hypothesis
often referred to as the experimental hypothesis, it predicts that something other than chance variation alone has played a part in producing the results obtained
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directional hypothesis
predicts the direction in which results are expected to occur e.g. MORE words are recalled from the list when using rehearsal as a mnemonic technique than when no mnemonic technique is used
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non- directional hypothesis
it does not predict the expected direction of outcome. e.g. there is a difference in the no. of words recalled from words list present with or without the presence of background music.
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Other cards in this set
Card 2
Front
repeated measures
Back
every participant is exposed to each experimental condition, so in effects participants are used as their own control group
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