Consider current enrollments (highlighted by hwc) in some psychology classes.
Psychology PSYC 101 Introductory Psychology 155 PSYC 201 Experimentation and Statistics 19 PSYC 221 Cognitive Psychology 55 PSYC 242 Social Psychology 55 PSYC 252 Psychological Disorders 55 PSYC 272 The Psychology of Education 51
Now, as always, this data is difficult to work with. I think that there may be many more students enrolled in PSYC 201 than 19, but that there are multiple sections. In any event, there is no excuse for a Williams major to consist of so many large lecture courses. Why not just go to Penn State? If you do not have a dozen or more substantive interactions with each of your professors over the course of a semester, you aren’t really getting a Williams education.
Why are these classes so large? How rigorously are they taught?