> Wang said students whose surnames start with A, B, C, D or E received a 0.3-point higher grade out of 100 possible points than compared with when they were gr

> Wang said students whose surnames start with A, B, C, D or E received a 0.3-point higher grade out of 100 possible points than compared with when they were graded randomly. Likewise, students with later-in-the-alphabet surnames received a 0.3-point lower grade — creating a 0.6-point gap. The hand-wringing over such a small effect size seems unwarranted. I suspect you would find similar effect sizes for other small interventions, like whether the grading took place during the week or the weekend, or in the morning vs. the evening.