Psychological influences refer to the various mental factors that affect an individual's thoughts, feelings, and behaviors. These influences can stem from personal experiences, social interactions, and cultural backgrounds. For example, cognitive biases can shape how people perceive information, while emotional states can impact decision-making processes. Additionally, psychological influences can be observed in group dynamics, where the behavior of individuals is affected by the presence of others. Concepts like conformity and peer pressure illustrate how social contexts can lead to changes in attitudes and actions. Understanding these influences is essential for fields like psychology and marketing.