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This term means that you match your subjects based on certain factors even though you give them different treatments. For example, perhaps you have 1000 participants in a study on the effects of chocolate on happiness. You might match the groups based on gender and age. Of the 1000 participants, you would have 500 pairs. An example of a pair would be two 23 year old women. Now one half of this pair would be in the control group (not receiving chocolate) and the other in the experimental group (receiving chocolate). Thus in this way, we know that both gender and age are not effecting the outcome of this experiment. Obviously you can match your pairs on any factor or combination thereof as appropriate to your study.

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Q: What does the term matched pairs mean?
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Matched Pairs involves participants being selected for one group only but part of each group are matched for some relevant factors eg) age, gender, height. Kiecolt Glaser did a matched pairs experiment in 1995.


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