A "spectrum" refers to a range of different values or characteristics that can be measured or observed. It is often used in various fields, such as physics, where it describes the range of electromagnetic waves, including visible light, radio waves, and X-rays. Each type of wave has a specific wavelength, and together they form the electromagnetic spectrum. In psychology, the term "spectrum" can describe a range of behaviors or conditions, such as in the case of the autism spectrum. This concept acknowledges that individuals may exhibit varying degrees of traits or symptoms, rather than fitting into a single category. Understanding these spectra helps in recognizing diversity within different phenomena.