Dr. Mark Ettensohn examines the common claim that personality disorders such as narcissistic personality disorder (NPD) are either caused by trauma or are primarily genetic. He argues that this framing presents a false dichotomy and does not reflect how personality development is understood in contemporary psychology.
The discussion begins by reconsidering what psychologists mean by the word trauma. Rather than treating trauma as a particular kind of event, Dr. Ettensohn explores the idea that trauma is better understood as the psychological injury resulting from life experiences. This distinction helps explain why children raised in the same family can have very different developmental outcomes despite sharing many of the same experiences.
The episode also examines the role of temperament and other heritable factors in personality development. While genetic predispositions influence how individuals experience and respond to their environments, they do not determine personality disorders in isolation. Instead, personality emerges through the ongoing interaction between biology and developmental experience.
Finally, Dr. Ettensohn addresses common arguments based on brain imaging and twin studies, explaining why these findings are often misunderstood in discussions about heritability. The episode considers the importance of construct validity, operationalization, and measurement when interpreting research on personality disorders, arguing that simplistic claims about either trauma or genetics fail to capture the complexity of human psychological development.
Additional Resources
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About Heal NPD
Heal NPD is a clinical practice specializing in the assessment and treatment of pathological narcissism, narcissistic personality disorder, and related personality difficulties. We offer comprehensive diagnostic assessments, individual psychotherapy, and consultations for partners and family members.
Learn more or inquire about services: https://healnpd.org
