Dr Thomas Johansen Oxford University Aristotle's Faculty Psychology Faculty psychology seeks to explain the multitude of psychological phenomena by reference to a limited and permanent set of capacities. First developed by ancient philosophers - Aristotle in particular - the approach was influential in the 18th and 19th centuries. In recent years, faculty psychology has resurfaced: understood as mental 'modules', faculties are widely thought to play a fundamental role in cognitive and evolutionary psychology. This study provides a re-examination of Aristotle's faculty psychology. The project has three aims: To explain what a psychological faculty is according to Aristotle and what roles the faculties play within his account of the soul. To enhance our understanding of Aristotle's psychological naturalism by placing the faculties of the soul within their biological context. To assess the relevance of Aristotle's faculty psychology today in the light of recent theorizing about faculties in cognitive and evolutionary psychology. The study falls into three parts: Part I considers Aristotle's definition and uses of the faculties of the soul in the De Anima. Part II considers the application of the faculties in the biological works to account for the composition and activities of living beings. Finally, Part III explores the relevance of Aristotle's psychology today through comparisons with cognitive and evolutionary psychology. The study is to be published as a monograph. Webpage: www.philosophy.ed.ac.uk/staff/johansen.html