attribution biases

Human behavior can be understood as issuing from "internal" factors or personal characteristics--such as motives, intentions, or personality traits--and from "external" factors--such as the physical or social environment and other factors deemed out of one's personal control. Self-serving creatures that we are, we tend to attribute our own successes to our intelligence, knowledge, skill, perseverance, and other positive personal traits. Our failures are blamed on bad luck, sabotage by others, a lost lucky charm, and other such things. These attribution biases are referred to as the dispositional attribution bias and the situational attribution bias. They are applied in reverse when we try to explain the actions of others. Others succeed because they're lucky or have connections and they fail because they're stupid, wicked, or lazy.