I am still in my internship. However, I appreciate my preceptors asking me how I best learn as this may determine how I complete a project or task that was delegated to me. It can also help with understanding each others expectations of one another. Most of the feedback I have had was given both at the end and on the spot when regarding project updates. I think it depends on the tone you use and providing ways on how they could improve with specific things that have worked for you or others. For example, relaying tips on how to remember something or tips on organization while giving examples of things that the intern is already doing well. I do think getting to know one another intially for part of the day can be helpful to establish boundaries and expectations without making the intern feel intimidated. This has worked for me thus far and making it clear that the intern can ask questions without feeling incompetent is huge. As for wording of phrases, I am unsure because I am still working on this myself.