Teacherbot

摘要

Since 2009, Utah has used computers to grade essays on a state student-assessment test. And testing companies use essay-evaluating software as one of two graders on graduate-school admissions exams such as the GRE. But how well, really, can a computer grade an essay? To find out, Mark Shermis, an education researcher at the University of Akron, ran 22,029 standardized middle- and high-school essays through software from eight companies (plus one open-source algorithm).