This definition excludes highly specialized learning that can only be obtained with extensive training and information confined to a single medium. General knowledge is an important component of crystallized intelligence and is strongly associated with general intelligence, and with openness to experience.
Studies have found that people who are highly knowledgeable in a particular domain tend to be knowledgeable in many. General knowledge is thought to be supported by long-term semantic memory ability.
A number of studies have found that males tend to have greater general knowledge than females, perhaps due to gender differences in interests rather than memory ability. Recent studies have found that general knowledge is associated with exam performance in school children and proofreading skills.
Differential psychology researchers define general knowledge as “culturally valued knowledge communicated by a range of non-specialist media.” The scope of this definition includes all areas of knowledge available to lay persons without requiring extensive training. The definition excludes “ephemera”, or information confined to a single medium, such as television sitcoms. Researchers have identified 20 domains of knowledge that meet the above criteria