Extraversion-introversion as a dimension of personality: A reappraisal.

The continued research interest in extraversion-introversion (EI) has centered around the unidimensionality of the construct and its relationship to adjustment. Research published since 1953 has failed to clarify these issues substantially, leaving the status of EI as a fruitful construct rather tenuous. (97 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)