I had a conversation a while back in which someone referred to research indicating that student evaluations of faculty should ideally be used for formative rather than summative evaluation (i.e. in making a plan for professional development, rather than for deciding things like promotion or merit). I want to find a reference, but can't seem to locate one specifically on this point (although I can find lots that point out various reasons student evaluations are flawed). Does anyone know of a reference for this argument? Thanks in advance!