  Because of the long tradition of exposition which has developed around Aristotle’s De Anima, the interpretation of even its most central theses is sometimes disputed. Moreover, because of its evident affinities with some prominent approaches in contemporary philosophy of mind, Aristotle’s psychology has received renewed interest and has incited intense interpretative dispute in recent decades. Consequently, this entry proceeds on two levels. The main article recounts the principal and distinctive claims of Aristotle’s psychology, avoiding so far as possible exegetical controversy and critical commentary. At the end of appropriate sections of the main article, readers are invited to explore problematic or advanced features of Aristotle’s theories by following the appropriate links.