I note in her abstract that she starts off by saying that psychological states are "real."
I didn't read any further than the abstract but that is one of the key issues that we answer philosophically rather than through science. What does "real" mean really mean?
I think that is what Epicurus was focusing on in major aspects of the canon of truth. There are all sorts of ways to think about what it means to be real to us, but ultimately I think he was seeing the canonical faculties as that ultimate testing ground of reality. Whatever they report to us is ultimately something we feel to be real at that moment. That doesn't mean that our opinion about the perception and the ideas / concepts we process from it are going to be accurate in all respects to wider reality, but whatever these faculties are reporting to us at any particular moment is something that our nature tells us to process as real at that moment. And that is all we as human beings can ever have as the raw data with which to judge for ourselves what is "real" to us.
And so while she may be interested in reducing the question to a matter or neurons or other bioiogical processes, that's a reduction that may lead to many medical or other practical benefits, but on the philosophical war level the focus remains on the philosophical question of the nature or truth and reality.