How Intelligence and IQ Work in the Brain | Dr. Richard Haier

In this episode, we sit down with neuroscientist Dr. Richard Haier to unpack what intelligence and IQ actually look like inside the brain. We talk about what decades of brain imaging research reveal about IQ, why higher intelligence is linked to more efficient brain activity, and what PET scans, genetics, and network models tell us about how intelligence works at a biological level.

We also explore common misconceptions about IQ, the limits of what training and environment can change, and what current science does and does not support when it comes to increasing intelligence.

This conversation focuses on evidence, not ideology, and draws from over 50 years of research in neuroscience and intelligence science.

Topics covered in this episode: – How IQ relates to brain efficiency – What PET scans reveal about intelligence – The Parieto-Frontal Integration Theory (PFIT) – Genetics, environment, and cognitive ability – Can IQ change over time? – What intelligence research actually shows

This is part of the RIOT IQ Podcast, where we explore human intelligence through science, data, and serious conversation. If you found this episode valuable, consider subscribing for future conversations like this and share it with someone interested in intelligence, neuroscience, or human behavior.

Dr. Richard Haier is also the founder of the HIrE Foundation, an initiative focused on supporting rigorous, open scientific research on intelligence and human cognition.

Learn more about the foundation here: https://www.hirefoundation.org/

🧪 Curious about your own IQ? If you want to explore your own ability profile, you can take a free sample of the RIOT IQ test at https://www.riotiq.com.