In Foundations of the Mind, Jean Mandler presents a new theory of cognitive development in infancy, focusing on the processes through which perceptual information is transformed into concepts. Drawing on extensive research, Mandler explores preverbal conceptualisation and shows how it forms the basis for both thought and language. She also emphasises the importance of distinguishing automatic perceptual processes from attentive conceptualisation, and argues that these two kinds of learning follow different principles, so it is crucial to specify the processes required by a given task. Countering both strong nativist and empiricist views, Mandler provides a fresh and markedly different perspective on early cognitive development, painting a new picture of the abilities and accomplishments of infants and the development of the mind.