Human brains have an enormous capacity to adapt to their environment. Brain plasticity relies on our ability to construct complex internal representations and to apply them to predict and act according to changing conditions in the world. Focusing largely on the auditory modality, the Jacoby Research Group  explores the roles of experience and exposure in creating and affecting our perception of the world. Using novel methodologies including massive online experiments, transmission chains, and cross-cultural research we aim to characterize the ways in which people from diverse backgrounds internalize and process external conditions. Studying such differences and similarities can help us better ascertain the interaction of nature and nurture in generating individual sensory experiences.

The group comprises three main areas of inquiry:

• Characterizing internal representations with massive online experiments: Harnessing techniques from Bayesian perception and machine learning techniques (such as transmission chains and Monte Carlo Markov Chain with People) to the investigation of foundational questions in psychophysics, this area of research explores the geometry of internal representations of complex perceptual spaces.

• Computational music cognition: Using corpus analysis, syntax modeling, causal analysis, and behavioral experiments, this branch of the project investigates latent structures in musical performance, works, and improvisation.
• Cross-cultural auditory perception: this branch of the project integrates elements from neuroscience, psychology, cultural anthropology, and ethnomusicology with the aim of significantly increasing our knowledge about the role of experience in determining auditory perception.