This is the website of Gwern Branwen, writer & independent researcher. I specialize in psychology, statistics, and technology; I am best known for my work on the darknet markets & Bitcoin, blinded self-experiments & Quantified Self analyses, dual n-back & spaced repetition, and modafinil.

For information about my site’s philosophy, method, traffic statistics, and implementation, see the About page; for information about myself, my use of other websites, and contact information, see the Links page; for information about recently added pages, see the Changelog; to be notified of updates, subscribe to my newsletter or RSS.