A hypothesized dimension of personality with two
theoretical poles, extraversion and introversion. Originally the dimension was
entertained as reflecting two unitary personality types that were presumed
opposites of each other. Today most theorists doubt that either exists as a
singular type, and instead regard both as collections of a number of different
patterns of behavior. Moreover, it also seems unlikely that the two poles can be
validly regarded as opposites since many increase in their display of behaviors
reflective of one pole, without necessarily diminishing the display
of behaviors
reflective of the other.