Observations serve as the raw data of social perception—an interplay of three sources: persons, situations, and behavior. These sources are used as evidence in supporting a person's impression or inference about others. Another important factor to understand when talking about social perception is attribution. Attribution is expressing an individual's personality as the source or cause of their behavior during an event or situation. To fully understand the impact of personal or situational attributions, social perceivers must integrate all available information into a unified impression. To finally confirm these impressions, people try to understand, find, and create information in the form of various biases. Most importantly, social perception is shaped by an individual's current motivations, emotions, and cognitive load capacity. Cognitive load is the complete amount of mental effort utilized in the working memory. All of this combined determines how people attribute certain traits and how those traits are interpreted.