Science is essentially a branch of philosophy ('Natural Philosophy), so in the broadest possible sense, yes. But I don't think what they are doing sounds like philosophy in the sense that most people would use it. It sounds like psychology. Which is fine! Psychology, after all, grew out of philosophy to begin with. I don't know why there should be a wall built up between the two fields.
Think about the dawn of computer science as another example. A lot of the foundational work was done by people who would have considered themselves philosophers, and most of the work firmly remained in philosophical and mathematical journals until people started physically realizing their work in the new machines, and then it became 'engineering' and 'science'. There's not a fine line where one guy was doing philosophy and another guy started doing 'computer science'. It was a gradual shift.