Is a hotdog a sandwich?Well, that depends on your definition of a sandwich (and a hotdog), and according to the most recent research in cognitive science, the odds that your concept of a sandwich is the same as another person's concept are shockingly low.In this episode we explore how understanding why that question became a world-spanning argument in the mid 2010s helps us understand some of the world-spanning arguments vexing us today. Our guest is psychologist Celeste Kidd who studies how we acquire and conceptualize information, form beliefs around those concepts, and, in general, make sense of the torrent of information blasting our brains each and every second. Her most recent paper examines how conceptual misalignment can lead to semantic disagreements, which can lead us to talk past each other (and get into arguments about things like whether hotdogs are sandwiches).• Celeste Kidd's Website: https://www.kiddlab.com• Celeste Kidd's Twitter: https://twitter.com/celestekidd• How Minds Change: www.davidmcraney.com/howmindschangehome• David McRaney’s Twitter: https://twitter.com/davidmcraney• YANSS Twitter: https://twitter.com/notsmartblog• Show Notes: www.youarenotsosmart.com• Newsletter: https://davidmcraney.substack.com• Latent Diversity in Human Concepts: https://tinyurl.com/25544m3v

Celeste Kidd is a professor of psychology at UC Berkeley. Her lab studies the processes involved in knowledge acquisition; essentially, how we form our beliefs over time and what allows us to select a subset of all the information we encounter in the world to form those beliefs. In this episode, we chat about attention and curiosity, beliefs and expectations, where certainty comes from, and much more.

Why are babies small and grownups big? Why are babies so helpless, instead of little versions of adults? Do babies know they're babies? How do babies grow? How do babies learn to talk? Kids have been sending us lots of questions about babies! This week we're learning more about the development of the human brain with Celeste Kidd, professor of psychology and primary investigator at the Kidd Lab at the University of California Berkeley. Download our learning guides: PDF | Google Slides | Transcript

Psychologist Celeste Kidd discusses how semantic disagreements, like the hotdog sandwich debate, arise from conceptual misalignment. Exploring the complexities of human communication, understanding, and the impact of semantic variability on shared reality.

Why are babies small and grownups big? Why are babies so helpless, instead of little versions of adults? Do babies know they're babies? How do babies grow? How do babies learn to talk? Kids have been sending us lots of questions about babies! This week we’re learning more about the development of the human brain  with Celeste Kidd, professor of psychology and primary investigator at the  Kidd Lab at the University of California Berkeley. Download our learning guides: PDF | Google Slides | Transcript It seems like a really bad idea, right? Human babies rely on adult humans for everything, while babies of some species never meet their parents and are able to take care of themselves as soon as their born! Why is that? While researchers aren’t sure on this one, Celeste Kidd says there are a lot of theories. “Because we are very intelligent, we need bigger brains to account for all the things we can do that other animals can’t do. If you have a big brain and you’re born via live birth – meaning you aren’t born from an egg – then there’s an upper limit on how big your head can be when you go through the birth canal,” she explains. In other words, we need those big brains to do all the things humans do, but a human head with a fully developed brain can’t fit through the birth canal. “The bigger your head needs to be ultimately, the more immature you need to be born,” Celeste says. So we have to develop and grow outside of the womb. We’re born with some of our brain power, but our brains keep growing long after we’re born, well into our 20s. And there are some advantages to that long period of childhood. “If you require dependence on your parents for a really long time, which humans do, that creates a lot of opportunity for you to learn a lot of stuff about your culture and the other people that you’re being raised with. We have a lot of knowledge that is unique to us as a species, and that’s unique to us as social groups,” Celeste says. The long childhood allows for a lot of cultural transmission – learning about tools, language, manners and arts. Some of these exist in other species, but the human systems are a lot more elaborate and take more time to learn!