Attribution: Why did that person do that? Foundation for more complex human behavior (e.g., altruism, agPerception (objects or people): The phenomenology : one-to-one correspondence between what I see and what is out there (i.e., feels simple, direct, & accurate). The reality : Perception is not simple, involves many steps, and is often inaccurate (though it is generally lawful ). UNCONSCIOUS INFERENCES Unconscious inferences from built-in assumptions fill in the gaps. Without such assumptions, we would have a difficult time making sense of the world. BUT: They can sometimes lead to mistakes, illusions. Person perception is like object perception in some key ways, different in others. HEIDER and the Logical Attributional Approach Heider (1958): The inferential processes by which we understand people based on their behaviourappearance are similar to how we understand objects based on their motionappearance . What do they have in common? Basic principles of causal analysis.