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May 8, 2024 – A strong sense of egocentricity and a grandiose sense of self-worth are also common, making them overconfident and disdainful of others. Individuals with pronounced psychopathic traits tend to be impulsive, showing poor behavior controls and a disregard for social norms and the law.  Scientists have also studied behavioral specificities of individuals with pronounced psychopathic traits. One study found that psychopathic murderers tend to use subordinating conjunctions when they talk (e.g., because, since, etc.) more often than non-psychopathic murderers. Other studies found that incarcerated psychopathic men tend to use higher number of hand gestures serving to break up communication, that psychopathic men in general tend to use more hand gestures compared to non-psychopathic individuals, and that they blinked more often.

Study author Samantha N. Rodriguez and her colleagues aimed to determine whether individuals with psychopathic traits exhibit specific patterns of head movement. The researchers noted that head movements are a crucial part of nonverbal communication, often used to support or contradict spoken words and convey various messages. Additionally, multiple studies have associated specific head movement patterns with various psychopathological conditions. The authors hypothesized that psychopathic traits might be linked to distinctive head movement patterns.

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