• Lazare et al have demonstrated a factor structure similar to the oral, obsessive, and hysterical personality syndromes in a female patient population. The factor structure has been replicated in a sample of 99 predominantly "normal" female and male twin pairs. Furthermore, it was found that hysterical traits in female subjects and oral traits in male subjects seemed to have a genetic component. The study also indicated that environmental factors from an early age influence the development of the personality structure.
Cand Psychol ST. The Oral, Obsessive, and Hysterical Personality SyndromesA Study of Hereditary and Environmental Factors by Means of the Twin Method. Arch Gen Psychiatry. 1980;37(11):1272-1277. doi:10.1001/archpsyc.1980.01780240070008