Folk psychology (sometimes calle naïve psychology, common sense psychology or vernacular psychology) is the set of background assumptions, socially-conditioned prejudices and convictions that are implicit in our everyday descriptions of others' behavior and in our ascriptions of their mental states. It includes concepts such as belief ("he thinks that Peter is wise"), desire ("she wants that piece of cake"), fear ("Alex is afraid of spiders") and hope ("she hopes that he is on time today").