Abstract

In contemporary philosophy of mind, the status of commonsense psychology has been vigorously discussed. However, philosophers have spent relatively little time determining what the commonsense theory is. In the thesis, I try to uncover the essential features of commonsense psychology. I use philosophical analysis as well as evidence from anthropology, linguistics, and psychology to develop an account of the theory. ;In the first chapter, I defend the claim that we rely on a psychological theory in the lay prediction of behavior. I argue that the rival view of this capacity, simulation theory, has a number of philosophical and empirical shortcomings. ;In Chapter Two, I maintain that causation is the central explanatory relation in commonsense psychology. However, I argue that the type of causation invoked by commonsense psychology is quite different from the Humean notion of causation that reigns in philosophy and psychology. ;In Chapter Three I argue that, contrary to the received view, at least part of commonsense psychology is not intentional psychology. An intentional psychology individuates mental states by their contents. However, I argue that there is no theory of content according to which content individuation will parallel belief individuation. I also argue that in contrast to intentional psychology, we can attribute beliefs that lack intelligible content. ;In Chapter Four I sketch an account of belief that makes explicit appeal to linguistic behavior. I extol the virtues of such accounts and argue that the standard objections against such accounts are far from decisive. ;In the final chapter, I argue that on the commonsense view beliefs are typically internal representations. I also argue that the generalizations of commonsense psychology, like the generalizations of Stich's syntactic psychology, specify the causal relations between mental states via the formal relations among content sentences. The picture of commonsense psychology that emerges is a benign representational theory of mind according to which mental states typically have content, but content isn't essential to the prediction and explanation of behavior.