The general aim of my research is to understand the processes involved when humans use numerical information. I do this by integrating perspectives from cognitive psychology, psychophysics, and developmental psychology. My work follows major two lines of research. The first investigates the properties of a primitive cognitive system, the Approximate Number System (ANS), which is present already in infancy and which is thought to provide the foundation for later mathematical ability. The second investigates how adults and infants extract and process statistical regularities in their environment to make intuitive statistical judgments. In my work on infants I mainly use eye tracking and behavioral paradigms.