The brain’s categorization process extends beyond physical characteristics to include abstract, functional features. This ability allows humans to create “social reality,” where we collectively assign functions or meanings to objects or concepts that don’t inherently possess them, such as the value of money or the concept of borders and citizenship.

The brain’s capacity for imagination, drawing from past experiences to create something entirely new, is a double-edged sword. While it allows for creativity and innovation, it can also lead to difficulties in staying present.

0:00 The debate over reality

0:57 Objective reality

3:54 Social reality

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About Lisa Feldman Barrett:

Dr. Lisa Feldman Barrett is among the top 1% most-cited scientists in the world, having published over 250 peer-reviewed scientific papers. Dr. Barrett is a University Distinguished Professor of psychology at Northeastern University with appointments at Harvard Medical School and Massachusetts General Hospital, where she is Chief Science Officer for the Center for Law, Brain & Behavior. She is the recipient of a NIH Director’s Pioneer Award for transformative research, a Guggenheim Fellowship in neuroscience, the Mentor Award for Lifetime Achievement from the Association for Psychological Science (APS) and from the Society for Affect Science (SAS), and the Distinguished Scientific Contribution Award from the American Psychological Association (APA). She is an elected fellow of the American Academy of Arts and Sciences, the Royal Society of Canada, and a number of other honorific societies. She is the author of How Emotions are Made: The Secret Life of the Brain, and more recently, Seven and a Half Lessons About the Brain.