Of Course It's True That Professors Grade Easier Than TAs

Last week when I was in a cafe waiting for my mediumskimicedmocha, I overhead one student say to another, "Of course it's true that professors grade easier than TAs", and the other student agreed with that statement. 

Of course! I rather liked this indication that we professors might actually become nicer with time, as opposed to more cranky and mean.

But do you agree with these students? (ignoring the 57 million variables for which we cannot scientifically or otherwise account in discussing this issue now in this blog post and comments).

Some considerations:

- If you used to be a teaching assistant and are now a professor, assuming that you have even a shred of objectivity about this issue, do you think you are an "easier" grader now than when you were a TA?

- If you are a professor now and you teach a class with teaching assistants, do you think you are an easier grader than your TAs? Is this generally true?

- If you are a teaching assistant now, do you have any idea how your grading "hardness" compares with that of the course instructor(s)?

Over the years, in some classes I have been an easier grader than my TAs and in other classes I have not, but if I had to generalize over my career, I would conclude that (1) I am an easier grader now, as a professor, than I was when I was a TA, and (2) I am commonly (but not in every case) an easier grader than most (but certainly not all) of my TAs. I gauge the latter by how many complaints I get about TA grading and, when faced with a grading dispute, whether I think the TA assigned a reasonable grade or was too harsh. [The latter case creates the tricky situation of needing to be fair to the student without undermining the TA, a topic for another day.]

There are likely many explanations for the TAs-are-more-severe-graders phenomenon, but some obvious ones that spring to mind are:

- We are more idealistic when we are just starting out in a career. We have standards, and these are not as flexible as they become later, when we have been teaching for years and might be more willing to reward a glimmer of knowledge as opposed to being severely disappointed that an answer is not as correct or complete as it should be. That does not necessarily mean that we old(er) professors are jaded and have lower standards (though it may).

- At least at the beginning, when we haven't had much experience as a teaching assistant, we don't have much of a basis for comparison and perhaps not much perspective to guide us in the more subjective aspects of grading things involving writing and equations and diagramming. When I was a TA, it was the rare professor who provided much guidance about grading issues such as partial credit, so I mostly made it up as I went along. I figured/hoped that as long as I was consistent, I couldn't go too far wrong.

- A related explanation: Some inexperienced TAs don't have the confidence to give partial credit for partially-correct answers. I recall a time -- many years ago -- when I (the professor) provided a TA with a detailed answer key to an exam. Fortunately I looked over some of the graded exams before handing them back to the students because I ended up having to re-grade several questions entirely because the TA had been inexplicably harsh. For example, in the answer key that I gave to the TA, I had indicated that the correct answer for one question was something like "kitty cat". That was the complete, official name of the thing that was the answer to the exam question, but it did not occur to me that the TA would give students no points if they only wrote "kitty". I should have written on the answer key that "kitty cat" or "kitty" or "cat" were acceptable for full credit, but it didn't occur to me that the student couldn't deal with this level of variability in student answers. Anyone who wrote one of those words clearly knew the answer, so why take off any (or all) of the points? I think the TA just lacked the confidence, and for some reason didn't even want to ask me about it while he was grading.

Now I am wondering: Assuming that I have become easier as a grader with time, have I plateaued or does the grading-easiness trend continue with time (and with what slope on a grading-easiness vs. time plot)?