If intellect in a broadly Aristotelian sense is at least partly nonpsychological and has a significant linguistic/cultural/social/historical aspect, how does the nonpsychological aspect relate to the psychological aspect?
Many 20th century authors, from Frege and Husserl to Lacan, sharply rejected the idea that thought should be approached primarily in psychological terms. Also, we should not consider the individual psyche to be like an island with unambiguous boundaries. Aristotle uses the single word ethos (the main subject matter of “ethics” in his view) both for individual acquired character and for culture. Character is a sort of micro-culture. Plato already famously compared the soul to a city.
Beatrice Longuenesse, who previously wrote a marvelous book on the Kantian transcendental deduction, recently suggested an unexpected connection between Kantian transcendental considerations and Freudian metapsychology. Meanwhile, at the end of the day, Kant ends up relatively closer to Aristotelian ethics than it would first appear. (Many scholars have debated the fine points of this, and Nancy Sherman wrote a whole book on it.) So what about an Aristotelian metapsychology?
Actually, it seems to me that Aristotle is more interested in metapsychology than in what we call psychology, and that his views on thought are better considered in this light. Frege and Husserl might part company with us here, but logically oriented criticisms of psychologism do not rule out all uses of metapsychology (or even psychology, for that matter).