Personally, I would have each of them do their evaluations in a separate
copy of the database, then I'd merge them into one.
No mater how you try to secure the data, if they are in a shared file there
are ways to crack into the other users' data.

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Rick B
> How can I create an evaluation table for a group of researchers to
> concurrently assess each other without any of them seeing how their team
> member is assessing others?