Trait Ascription Bias

Trait ascription bias is the belief that other people's behavior and reactions are generally predictable while you yourself are more unpredictable. This is essentially fooling one's self about how much other people really know or expect from your behavior. Think about people you have known in your life and how many of them thought that they were keeping confidential information, yet everyone around them knew what was going on: things like having a "secret" romance or family problems. These so-called "secrets" were often quite transparent to those around them.