Indeed, this forms the basis for my confusion about the significance of the percentile. Yes, I took the shelf as part of a medical biochemistry course I took at an SMP. I am wondering if the percentile compares me to medical students or to anyone who took the shelf exam (be them med students, premeds, or random people taking a class somewhere that offers the shelf exam). The latter would clearly dilute the significance of the percentile.
I am also interested in understanding more about the shelf as an indicator of STEP scores, which gujudoc alluded to a bit. I am wondering whether an adcom member might think that a high shelf score (if the 590 is indeed high) demonstrates ability to be competitive on the STEPs.
Thank you for the help! Even the 18 year olds who have no idea what a shelf exam is but attempted to teach me what a percentile is 😉 I appreciate the PMs dbags