Swarthmore College PBK is allowed to induct up to 15% of the graduation class, which is usually between 50-60 students. The primary basis of selection is academic excellence, normally represented by PBK GPA, along with good moral character and the following criteria:
- Earn at least one full credit towards Swarthmore graduation in math/stat/logic (including AP);
- Earning a letter grade in at least one Swarthmore College course in each division. Humanities, Natural Sciences, Social Sciences (shadow grades do not count).
These criteria are largely drawn from national Phi Beta Kappa stipulations for membership eligibility.
The executive committee also sends the proposed inductee list to the Deans to see whether the Dean's Office has any objection to students on grounds of moral character.
PBK GPA is computed by the Registrar with a few modifications to the college GPA. The Registrar counts A and A+ as 4, A- as 3.67, B+ as 3.33, and so forth. Courses taken at other institutions, including Bryn Mawr and Haverford are not counted, neither are courses recorded as CR or as W. In these respects, the PBK GPA and the college GPA are alike. The two measures differ in the following three ways.
a) The Registrar counts neither courses receiving CR nor courses receiving NC whereas PBK accounts courses receiving NC (except in the first semester of the first year at Swarthmore), with the NC converted numerically to 0. An NC course receives as much credit in our calculation (e.g. 1 or 1.5) as it would receive with the Registrar had it been a passing grade.
b) When a course is taken twice, the Registrar counts only the second grade. PBK counts both grades.
c) The Registrar does not count the first course of a two-course sequence, such as in the foreign languages, if the student fails to take the second course. PBK counts that grade (typically worth 1.5 credits) in our calculations.