Our best evidence of the effects of laptop policy comes from a separate analysis that compares the exam
scores of students assigned to the unrestricted - use and tablet - only classrooms to those of students
in classes where laptops were banned, while adjusting for the
minor differences in the backgrounds of students across groups and including controls for the instructor, the class hour, and the semester.
Only
in Dayton were there
minor differences in the pre-lottery test
scores: those offered a voucher
scored 6.5 percentile points lower
in math and 3.1 points lower
in reading than those not offered a scholarship, a statistically significant
difference.