I am studying a simple educational environment where there are two types of activities (call them A and B). There are three types of students: those who only engage in A, those who only engage B, and those who engage in both. It's easy enough to name the first two categories (I name them after the activity types, e.g. "viewers" for those who view lectures), but I'm struggling to come up with a good way to refer to the third type of student. What is a relatively common word that roughly means "student who engages in both types of activities", but doesn't connote that he/she is particularly good at them?
Learn English – a word for someone who engages in both activities in a two-activity environment
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Best Answer
Jack of all trades is the term that immediately comes to mind. Very common: check. Doesn't connote that the person in question is particularly good at any particular trade: check. In your case, "all" just happens to amount to two, which is not a problem and would be perfectly clear from context.
Edit in response to your comment: Jacks of all trades is fine. And of course the more constraints you keep considering, the less likely it is you will get a result that's less weird, or indeed that you get a result at all.
That being said, since you are aiming for a single-word agent noun, all you need to think of is a verb to derive it from. You have viewer for people who view, listener for people who listen, and so on. Now, since you specifically didn't mention what the other type of activity was, we can't think of a verb that would mean "view + the other activity", but have to go with a very generic verb for "doing more than one thing at once". For which the most common word in my book is multitasking.
So your single-word agent noun would be multitasker.