The term "illusory" refers to something that is deceptive or misleading, often creating a false impression of reality. It can describe experiences, perceptions, or objects that appear to be one way but are actually different upon closer inspection. For example, an optical illusion tricks the brain into seeing something that isn't there or misinterpreting what is seen. In psychology, illusory effects can influence how people perceive their surroundings or make decisions. Cognitive biases can lead individuals to form incorrect beliefs based on incomplete or misleading information. Understanding these illusions helps in recognizing the difference between perception and reality.