Is Frege's puzzle based on Psychological Data?

In this paper, I explore and evaluate Frege’s data. Different from I call the traditional conception – especially those proposals provided by Howard Wettstein, Nathan Salmon and John Perry in the 80’s, which I take as representative philosophers from the traditional conception –, I support that Frege’s puzzle cannot be based on psychological data. I hold that only epistemic data can cause Frege’s puzzle and explain what are these epistemic data and the difference between these data and the psychological one, considering and replying to a possible objection