Letter to Editor: Effect size: an overlooked issue in published articles in Journal of Research Health

Up to now, from fall 2011 to summer 2014, eighty seven articles have been published in nine issues of the Research Health Journal. In reviewing these articles, it is clear that although 61 out of the 87 articles (70%) used inferential statistics, none of them reported or interpreted the effect sizes (ESs) along with P-values for statistically significant or non-significant results.