(First of all, sorry if this is a silly question; this is not my discipline.)
I am planning on conducting a study, and one of the things I would like to have is a sense of participants' long-term memory (I am thinking of remembering a set of numbers after ~10 minutes). I do not have enough time to conduct a proper long-term memory test, so I was wondering whether a working memory test (such as OSPAN) would be a good proxy for long-term memory.
I have tried to find research on the topic using Google Scholar and reading some of the results, but I have not found a clear answer to this question. It would be great if you could provide some insight or cites of relevant work.
What I imagine are papers in which a given set of participants takes both working memory and long-term memory tests, and the correlation between performance in these is correlated.
Additionally, I am not interested in whether long-term memory about something increases working memory. Just whether people who have good working memory happen to be people that also have good long-term memory.