Read the paper, the authors did a power analysis to arrive at their participant sample size. ( http://myweb.fsu.edu/vshute/pdf/portal1.pdf http://myweb.fsu.edu/

Read the paper, the authors did a power analysis to arrive at their participant sample size. ( http://myweb.fsu.edu/vshute/pdf/portal1.pdf http://myweb.fsu.edu/vshute/pdf/portal1.pdf ) > We needed at least 34 participants per condition to estimate moderate effect sizes in our analyses, with a power of .90.