A total of 1,954 volunteers without a formal diagnosis of dementia took part in the study, filling out personality questionnaires that were cross-checked against their health records and any cognitive problems as they got older. Curiously enough, organized and self-disciplined people appeared less likely to develop mild cognitive impairment, whereas neurotic people were more prone to it.
As this was a correlational study, it's not clear if there are fundamental aspects of biology underpinning the link, but the researchers have their suspicions.
"Personality traits reflect relatively enduring patterns of thinking and behaving, which may cumulatively affect engagement in healthy and unhealthy behaviors and thought patterns across the lifespan," says psychologist Tomiko Yoneda, from the University of Victoria in Canada.
"The accumulation of lifelong experiences may then contribute to susceptibility of particular diseases or disorders, such as mild cognitive impairment, or contribute to individual differences in the ability to withstand age-related neurological changes."
Personality traits are usually divided into the so-called 'Big Five', which are agreeableness, openness to experience, conscientiousness, neuroticism, and extraversion. This particular study examined the last three.
Conscientiousness covers traits including being responsible, being well organized, working hard, and being goal-oriented. Those who scored highly for conscientiousness on a scale of 0–48 were less likely to develop impairments – a 6 point increase on the scale was associated with a 22 percent lower risk. READ MORE...
