Spaced retrieval in real classrooms
Principal investigator · Two-year field study, 9 public high schools · 2023 – 2025
A two-year field experiment testing whether spaced retrieval practice survives outside the lab, run with 1,400 students across nine schools and ordinary teacher-led lessons.
Overview
Impact
1,400
Students
d = 0.41
Delayed-test effect
2
Publications
Effect size of d = 0.41 on the eight-week delayed test. Two peer-reviewed publications, and the spaced schedule was adopted district-wide in two of the participating districts.
Links
Reviews
“Nadia held a nine-school study together for two years without losing a single site. The pre-registration was so clean that reviewers had almost nothing to push back on.”
“She gave our teachers something they could actually put in a lesson plan on Monday. That is rare in education research.”