Stuart James Ritchie is a Scottish psychologist and science communicator known for his research in human intelligence.

He works at the artificial intelligence research company Anthropic.

[1] Ritchie has served as a lecturer at the Institute of Psychiatry, Psychology and Neuroscience at King's College London since the summer of 2018.

[2][3][4] In 2021, his book Science Fictions was nominated for the £25,000 Royal Society Prize for Science Books but lost to Merlin Sheldrake's Entangled Life.

[5] Ritchie writes a newsletter titled Science Fictions for the newspaper i (previously for his own newsletter prior to 2023) which, like his book of the same name, focuses on scientific controversies and bias and fraud in scientific research.