Chapter 6: Further Reading

Essential Sources

McCrae, R. R., & Costa, P. T., Jr. (2008). "The five-factor theory of personality." In O. P. John, R. W. Robins, & L. A. Pervin (Eds.), Handbook of Personality: Theory and Research (3rd ed., pp. 159–181). Guilford Press. The definitive overview of the Big Five model, including the measurement of extroversion as a continuous dimension with multiple facets.

Roberts, B. W., Walton, K. E., & Viechtbauer, W. (2006). "Patterns of mean-level change in personality traits across the life course: A meta-analysis of longitudinal studies." Psychological Bulletin, 132(1), 1–25. The meta-analysis showing that personality traits, including extroversion, change systematically over the lifespan. Critical evidence against the "introversion is fixed" claim.

Grant, A. M. (2013). "Rethinking the extraverted sales ideal: The ambivert advantage." Psychological Science, 24(6), 1024–1030. Research showing that ambiverts outperform both strong introverts and strong extroverts in sales, challenging the idea that extroversion is always advantageous.

Cain, S. (2012). Quiet: The Power of Introverts in a World That Can't Stop Talking. Crown. The book that launched the introvert movement. Read it for its cultural argument (which is valuable) while noting its reinforcement of the binary framework (which is oversimplified).

Jang, K. L., Livesley, W. J., & Vernon, P. A. (1996). "Heritability of the big five personality dimensions and their facets: A twin study." Journal of Personality, 64(3), 577–591. Twin study estimating the heritability of Big Five dimensions, including extroversion (approximately 54%). Key evidence that personality is partly genetic but not deterministic.

Eysenck, H. J. (1967). The Biological Basis of Personality. Charles C. Thomas. Eysenck's original presentation of the cortical arousal theory of introversion-extroversion. Historical foundation of the scientific study.

Bernstein, E. S., & Turban, S. (2018). "The impact of the 'open' workspace on human collaboration." Philosophical Transactions of the Royal Society B, 373(1753), 20170239. The study finding that open-plan offices decreased face-to-face interaction by about 70% — supporting the argument that forced collaboration doesn't work for everyone.

DeYoung, C. G., Quilty, L. C., & Peterson, J. B. (2007). "Between facets and domains: 10 aspects of the Big Five." Journal of Personality and Social Psychology, 93(5), 880–896. Refined Big Five model distinguishing 10 aspects (two per factor), helping explain within-dimension variation.

Fleeson, W. (2001). "Toward a structure- and process-integrated view of personality: Traits as density distributions of states." Journal of Personality and Social Psychology, 80(6), 1011–1027. Research showing that even people with strong personality traits display substantial variation in their behavior across situations — the "density distribution" model.

Online Resources

International Personality Item Pool (IPIP). Free, scientifically validated personality inventories including Big Five measures. Use the IPIP-NEO for a detailed extroversion profile with facet scores.

Personality Project (personality-project.org). Open-source tools and resources for personality measurement, maintained by personality researchers.