Study: Military Service Changes Personality

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Camp Pendleton Marines in Afghanistan

Serving in the military can subtly change a man's personality in ways that can hurt his social ties, according to a new study. Researchers from Washington University in St. Louis say this "lingering effect" on a service member can make it more difficult for him to relate to family, friends, and coworkers.

Psychology professor Dr. Joshua Jackson says his research was done with the knowledge that men who enter the military tend not to be worriers and to be less "neurotic" than those who don't. They're also more competitive and aggressive, according to Jackson:

Jackson conducted his study by researching German men for six years after they left high school - both those who entered the military and those who did not.

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