Most psychological research comes from studies performed with men. So the research on the conceptualisation of psychopathy and the studies investigating the association between psychopathic traits and age are no exception. These previous studies suggest that certain psychopathic traits vary with age.
For instance, younger men (compared to older men) score higher on psychopathic traits measuring impulsive-antisocial behaviour, like impulsivity, irresponsibility, and criminal versatility.
Psychopathic traits reflecting core personality traits of interpersonal and affective dysfunction, like conning and manipulative behaviour and lack of empathy, guilt, and remorse, younger and older men remain relatively stable across different age categories.
"Do psychopathic traits vary with age among women? A cross-sectional investigation" - https://www.researchgate.net/publication/358554712_Do_psychopathic_traits_vary_with_age_among_women_A_cross-sectional_investigation is an excellent article aiming to determine whether psychopathic traits vary similarly with age among women.
This study measured psychopathy scores via the Psychopathy Checklist-Revised [PCL-R]) among a sample of 501 incarcerated women ranging from 19 to 57 years.
The results were consistent with previous studies performed with men. Younger women scored higher on psychopathic traits measuring impulsive-antisocial behaviour than older women. While the scores assessing core personality traits, including interpersonal and affective dysfunction, were comparable across women in different age categories.
It seems like men and women are not so different when it comes to the variation and stability of specific psychopathic traits across the lifespan. The study's results are consistent with previous studies performed with samples composed entirely of men.
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