Paired-sample t-tests
A paired-sample t-test is used in a repeated measures design, where the same participants are tested more than once. The t-test works best with larger sample sizes. When the sample size is small, using a t-test without checking the data first can increase the risk of a Type I error, which means incorrectly rejecting a true null hypothesis. If your sample size is fewer than 30 participants, you should first check...