How many semesters of data are required for a study?

A minimum of two semesters or terms of course records are required for an AP placement validity study. AP credit-holding students may enter the sequent or subsequent course immediately upon matriculation, but non-AP students need time to take the AP-equivalent course(s) and the sequent or subsequent course. If your policy offers credit for more than one course, you may need more than two semesters of data.