A Cognitive Bias is a multichannel video projection that explores the concept of frequency illusions. A frequency illusion is a type of cognitive bias in which a person believes they are seeing a number, color, word or other thing at a higher frequency. In the case of this video, I am exploring my own cognitive bias towards the numbers 237, 238 and 239. This is an invitation to the viewer to take part in my frequency illusions and to make them aware of their own.