Chapter 6: Analysing the Data |

## The Paired Sample t-TestThe Paired Sample t-test is an example of a repeated measures design. The distinction between 'Between groups' designs and 'Repeated measures' designs is an important one. You should read the relevant parts of Howell and Ray so that you are clear on the logic and consequences associated with each design and the advantages and disadvantages of each design. Repeated measures designs have the especially important advantage of being more There are a number of problems associated with using a repeated measures design instead of a between groups design, however. In particular, carry-over effects in the form of boredom, fatigue, and practice effects need to be catered for. Another problem is the loss in degrees of freedom. The between groups t-test has n |

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