1. The happiness of extraverts;Argyle;Personality and Individual Differences,1990
2. What is the central feature of extraversion? Social attention versus reward sensitivity;Ashton;Journal of Personality and Social Psychology,2002
3. Bradley, M. M., & Lang, P. J. (1999). Affective norms for English words (ANEW): Instruction manual and affective ratings. Technical Report C-1, The Center for Research in Psychophysiology, University of Florida.
4. Revised NEO Personality Inventory (NEO-PI-R) and NEO Five-Factor Inventory (NEO-FFI) professional manual;Costa,1992
5. Subjective well-being;Diener;Psychological Bulletin,1984