David McRaney
Author, "You Are Not So Smart"
David McRaney is a science journalist fascinated with brains, minds, and culture. He started the You Are Not So Smart blog in 2009, and it became an internationally bestselling book shortly after, now available in 17 languages. It then became a podcast. His second book, You Are Now Less Dumb, was released in 2013, and his third book, How Minds Change, comes out in 2022. He also gives lectures all over the world.

The first personality tests revolved around assessing people’s reactions to ambiguous and often unsettling images. Today, the gold standard is a barrage of questions.
The twisting path to becoming less dumb has led to many stops.