Chris Frith

Frith's pioneering cognitive neuropsychology research explains schizophrenia as a disorder of self-monitoring and predicting one's own actions. He theorized that a breakdown in the brain's ability to distinguish self-generated thoughts from external stimuli leads to hallucinations and delusions of control. His work shifted the understanding of schizophrenia from purely psychotic breaks to fundamental cognitive processing errors.

The sense of agency is the subjective feeling of being in control of one's own actions and their outcomes. Frith's neuroimaging studies examine how the brain's predictive models create this feeling by matching intended actions with actual sensory feedback. When this prediction mechanism fails, as it can in schizophrenia, people feel that their thoughts or bodies are being controlled by outside forces.

*Making Up the Mind: How the Brain Creates Our Mental World* is a book by Chris Frith that explains how our brain constructs our experience of reality through prediction. It uses neuroimaging and cognitive experiments to show that what we perceive is heavily filtered and constructed, rather than a direct readout of the physical world. The book bridges the gap between physical brain mechanics and conscious experience.

Frith relies heavily on cognitive experiments paired with functional magnetic resonance imaging (fMRI) to study how we understand others. His research helped identify the mirror neuron system and the mentalizing network in the brain. He uses these tools to see how healthy brains simulate the intentions and beliefs of other people during social interactions.