Konsumen
Suatu perilaku dalam mengonsumsi dapat dikatakan tidak rasional jika konsumen tersebut membeli barang tanpa dipikirkan kegunaannya terlebih dahulu. Contohnya, yaitu:
Martin Lindstrom
Di buku "Buyology: Truth and Lies About Why We Buy", Lindstrom menganalisis hal-analyzes what makes people buy in a world which is cluttered with messages like advertisements, slogans, jingle, and celebrity endorsements. Through a study of the human psyche, he discusses the subconscious mind and how it plays a major role in deciding what the buyer will buy. The author claims to have studied the behavior of 2,000 humans for three years.