Thomas Reid, Adam Ferguson and Dugald Stewart were exponents of the experimental philosophy of mind in the Scottish Enlightenment. The unique character of their philosophical project lies in the adoption of the mind-matter dualism as a necessary condition for the study of mental phenomena. This fact led them to recognize the importance of Descartes, both for being the first to clearly delimit the mental and material realms, and for emphasizing the relevance of reflection as an instrument for the study of mind. But at the same time, the Frenchman was also the target of their criticism for dismissing the value of experimentation and appealing to hypotheses to explain natural behaviour. This paper aims to review this group of Scottish philosop...