Final answer:
Characteristics shared by most members of a culture, according to Gordon Allport, are termed common traits, which are part of the central traits that define our personalities.
Step-by-step explanation:
According to Gordon Allport, characteristics that are shared by most members of a culture are termed common traits. Trait theorists, such as Allport, classify personality traits into three categories: cardinal traits, central traits, and secondary traits. Common traits are considered central traits, as they represent characteristics that make up much of our personalities and are typical within a certain culture or society. For example, if reliability and politeness are valued and widespread within a culture, these could be considered common traits among its members.