Can we include part-time students in our sample for an admission validity study?

Part-time students can be included in your ACES study. However, part-time students can be very different from full-time students (e.g., they may be, on average, much older than traditional full-time students right out of high school). Therefore, you might want to include a school-supplied subgrouping variable stating the status of the student (e.g., 1= full-time, 2= part-time) so that you can compare them.