If the answers offered are:       New or old       Recently discovered or confirmed       Universal or linked to a specific culture       All of the above       None of the above Here is what the book has to say: A finding that occurs across … Read more

In addition to these more practical considerations, there is another factor that enters into our determination of the number of participants we will use. This factor is the amount of variability we expect to be present within each group. The less the within-group variability (i.e., the more homogeneous the participants), the fewer participants we will … Read more