Neuroscience
As we continue to settle into ourselves, you might think that personality would be something that becomes ever more cemented through life. Not so, according to a survey of nearly 4000 New Zealanders aged from 20 to 80 years (including 2409 women). Petar Milojev and Chris Sibley report that the stability of personality increases through youth, peaks in mid-life and then gradually reduces again into old age, presumably in response to the variations in social and biological pressures we experience at the different stages of life.
The researchers asked their participants to complete short personality questionnaires twice, two-years apart. The questionnaires measured the Big Five traits (extraversion, agreeableness, conscientiousness, neuroticism, and openness to experience) and also an honesty-humility factor. The researchers then looked to see how the "rank-order stability" of people's traits (how their scores ranked compared to other people's) varied across that two-year gap, and how this stability varied as a function of age.
The participants' personalities showed "impressive" stability, as you'd expect since personality is meant to be a description of people's pervasive traits. Extraversion was the most stable trait, and agreeableness the least. However, the key finding was that personality stability varied through the lifespan, increasing from the 20s to the 40s and 50s, and then declining towards old age, up to age 80. This broad pattern was found for all traits, except for agreeableness, which showed gradually reduced stability through life. For conscientiousness, openness to experience, and honesty-humility, trait instability had returned at the oldest age to the levels seen at the youngest age.
For the five traits that showed an inverted U-shape pattern of changing stability through life, Milojev and Sibley found that the specific point of peak stability varied - extraversion and neuroticism showed highest stability in the late 30s, while the other traits (openness, honesty-humility, and conscientiousness) showed peak stability in the late 40s, early 50s. The researchers said these "domain specific" variations in personality stability point to different environmental and social demands influencing different personality traits to varying degrees at slightly different times of life.
"This report further highlights the need to test ... the effects of events that might cause the lower stability [of personality] in younger and older adulthood," the researchers said. "In addition our finding of systematically different peaks in stability between different personality dimensions suggest the need to further investigate age-specific changes in environmental and social pressures that are associated with such domain-specific effects."
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Milojev, P., & Sibley, C. (2014). The stability of adult personality varies across age: Evidence from a two-year longitudinal sample of adult New Zealanders Journal of Research in Personality, 51, 29-37 DOI: 10.1016/j.jrp.2014.04.005
--further reading--
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Neuroscience
The stability of your personality peaks in mid-life (then grows increasingly wobbly again)
The researchers asked their participants to complete short personality questionnaires twice, two-years apart. The questionnaires measured the Big Five traits (extraversion, agreeableness, conscientiousness, neuroticism, and openness to experience) and also an honesty-humility factor. The researchers then looked to see how the "rank-order stability" of people's traits (how their scores ranked compared to other people's) varied across that two-year gap, and how this stability varied as a function of age.
The participants' personalities showed "impressive" stability, as you'd expect since personality is meant to be a description of people's pervasive traits. Extraversion was the most stable trait, and agreeableness the least. However, the key finding was that personality stability varied through the lifespan, increasing from the 20s to the 40s and 50s, and then declining towards old age, up to age 80. This broad pattern was found for all traits, except for agreeableness, which showed gradually reduced stability through life. For conscientiousness, openness to experience, and honesty-humility, trait instability had returned at the oldest age to the levels seen at the youngest age.
For the five traits that showed an inverted U-shape pattern of changing stability through life, Milojev and Sibley found that the specific point of peak stability varied - extraversion and neuroticism showed highest stability in the late 30s, while the other traits (openness, honesty-humility, and conscientiousness) showed peak stability in the late 40s, early 50s. The researchers said these "domain specific" variations in personality stability point to different environmental and social demands influencing different personality traits to varying degrees at slightly different times of life.
"This report further highlights the need to test ... the effects of events that might cause the lower stability [of personality] in younger and older adulthood," the researchers said. "In addition our finding of systematically different peaks in stability between different personality dimensions suggest the need to further investigate age-specific changes in environmental and social pressures that are associated with such domain-specific effects."
_________________________________
Milojev, P., & Sibley, C. (2014). The stability of adult personality varies across age: Evidence from a two-year longitudinal sample of adult New Zealanders Journal of Research in Personality, 51, 29-37 DOI: 10.1016/j.jrp.2014.04.005
--further reading--
How your mood changes your personality
Why are extraverts happier?
Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.
- People May Be Happier When Their Neighbourhood Fits Their Personality
Levels of trait "openness to experience" are higher in central London than other areas of the city. Image from PNAS. It is surely easier to be happy in some neighbourhoods than others. But a new study suggests one size does not fit all. Based on...
- How Your Mood Changes Your Personality
Participants scored higher on neuroticism & lower on extraversion when they were sadExcept in extreme cases of illness or trauma, we usually expect each other's personalities to remain stable through life. Indeed, central to the definition of...
- Can You Fake Your Personality In A Photo?
Say you wanted your Facebook pic or Twitter avatar to convey to the world that you have a particular personality type, different from how you really are, would you be able to pose in a such a way to achieve this? A new Finnish study led by Sointu Leikas...
- What Do Your Thoughts Reveal About You?
Psychologists have spent a great deal of time investigating how much of our personalities we reveal publicly: in the clothes we wear, the arrangement of our offices, the design of our websites. But what if it were possible to tap into someone's thoughts?...
- Change Your Personality, Learn A New Language
The personality of people who are bilingual changes depending on which language they use, lending credence to the Czech proverb “Learn a new language and get a new soul”. That’s according to Nairan Ramirez-Esparza and colleagues who assessed the...