In this episode of The Testing Show, Michael Larsen interviews Señor Performo, Leandro Melendez, about cognitive biases and how they can affect testing. They discuss various biases such as confirmation bias, the halo effect, the sunk cost fallacy, and more. We like to think that we are immune to cognitive biases and logical fallacies because we testers prize critical thinking but as Leandro points out, you would be wrong, we are as prone to them as anyone else.