“…The median values of average impact, differential impact by minority status, and differential impact by eligibility for free or reduced price lunch had magnitudes 4.55, 3.65, and 2.35, respectively (outcomes were expressed as percentages). Several other experiments showed similarly equivocal results, with magnitudes of ESs being sometimes larger and sometimes smaller than magnitudes of DESs, or they had similar values (Jaciw, Hegseth, Ma, & Lai, 2012; James-Burdumy et al, 2010; Somers et al, 2010).…”