As you age, personality traits generally shift towards greater maturity, with increased Conscientiousness (organized, disciplined) and Agreeableness (cooperative, warm), and decreased Neuroticism (anxiety, pessimism) in middle age, though this can rise again later. Extraversion (sociability, assertiveness) and Openness to Experience (curiosity, adventurousness) often decline in later life, while physical and cognitive functions like fluid intelligence, hearing, and vision also naturally diminish, impacting how we interact with the world.
Agreeableness demonstrated a fairly linear increase with age whereas the pattern for Conscientiousness was curvilinear: scores increased up to a peak somewhere between the ages of 50 to 70 and then declined. Average levels of Neuroticism generally declined with age but increased slightly starting around age 80.
A recent meta-analysis revealed that higher neuroticism and lower conscientiousness are consistent predictors of higher dementia risk, across dementia types, including Alzheimer's disease (AD), dementia assessment methods, follow-up lengths, and countries (Aschwanden et al., 2021).
Stability and Change in the Big Five across Adulthood
Previous work has shown that the Big Five are moderately-to-highly stable across adulthood, with test-retest correlations ranging from . 54 to . 70 across shorter time intervals and from . 31 to .
One of the personality traits that increase with age is agreeableness. In old age, people are more oriented towards other people, which leads to an increase in agreeableness.
And they can track how those traits increase or decrease in a group over time. To the surprise of many in the field, those kinds of studies are revealing that the strongest personality changes tend to happen before age 30—and after 60.
The top 3 rarest personality types are consistently identified as INFJ (The Advocate), ENTJ (The Commander), and INTJ (The Architect), with INFJ usually being the absolute rarest (around 1.5%), followed by ENTJ (around 1.8%), and INTJ (around 2-3%) of the general population, according to Psych Central, Redeemed Mental Health, and Reddit.
In terms of mean-level change, people show increased selfconfidence, warmth, self-control, and emotional stability with age. These changes predominate in young adulthood (age 20–40). Moreover, mean-level change in personality traits occurs in middle and old age, showing that personality traits can change at any age.
As people age, they typically gain emotional awareness, coping skills, and self-understanding. This natural maturity can reshape how certain traits appear. Our experiences and ability to regulate our emotions can influence our personality traits.
Openness has been found to be generally stable through middle adulthood, followed by decline through late adulthood (Mõttus, Johnson, Starr, & Deary, 2012; Roberts et al., 2006), a finding also observed in a previous study using SATSA data (Pedersen & Reynolds, 1998).
The "2-finger test" for dementia involves an examiner showing a hand gesture (like interlocking index and middle fingers) and asking the patient to copy it, testing motor skills, visual memory, and coordination, as difficulties can signal early cognitive decline, but it's a screening tool, not a definitive diagnosis, prompting further medical evaluation. Other related tests include finger-tapping and finger-to-nose, looking for hesitation or misjudgment in movement.
Common changes in behaviour
The 10 warning signs of dementia include memory loss, difficulty with familiar tasks, confusion about time/place, trouble with language, poor judgment, misplacing things, personality changes, loss of initiative, and problems with visual/spatial skills, requiring professional assessment to distinguish from normal aging.
Seniors may experience emotional challenges such as loneliness, grief or loss of independence. These feelings can lead to anger outbursts. It's essential to provide emotional support and encourage open communication to help seniors express their feelings.
You Maintain Physical Strength and Mobility
“Being able to move around easily, whether it's taking daily walks, climbing stairs, or carrying groceries, is a classic sign of healthy aging,” Dr. Badessa says. “Good strength, balance, and endurance mean you can stay independent and continue doing the activities you love.”
personality changes – reduced sensitivity to others' feelings, making people seem cold and unfeeling. lack of social awareness – making inappropriate jokes or showing a lack of tact, though some people may become very withdrawn and apathetic. language problems – difficulty finding the right words or understanding them.
“… relatively little decline in performance occurs until people are about 50 years old.” (Albert & Heaton, 1988). “… cognitive abilities generally remain stable throughout adult life until around age sixty.” (Plassman, et al., 1995)
Large-scale longitudinal studies have demonstrated that the most active period of personality development appears to be between the ages of 20–40.
Results. Our results found that conscientiousness significantly predicted greater longevity, even in a model including the two proposed mediator variables, gender, age, and years of education. Moreover, cognitive functioning appears to partially mediate this relationship.
As adults age, the Big Five personality traits that are likely to decline are "Neuroticism" and "Extraversion." These traits often decrease in intensity as individuals become more emotionally stable and less socially outgoing with age. As adults age, the trait that is most likely to decline is neuroticism.
Anxiety, panic, depression, post-traumatic stress disorder (PTSD), bipolar disorder, schizophrenia, and others can all fundamentally change how a person perceives and interacts with the world around them. Lastly, addiction can play a large role in these sudden personality changes.
ESFJ (the caregiver) are very warm, compassionate, and helpful people. They are often willing to go the extra mile for others. Other personality types like ISFJ, INFJ, ENFJ, ENFP, and ISFP are also loyal, kind, and gentle souls, and personalities to have as friends, leaders, and family.
Some argue Jesus might be better described as an ENFJ, the charismatic teacher and motivator. His ability to inspire crowds, lead disciples, and spark movements certainly fits. Others might suggest INFP, given his introspection, values-driven teaching, and focus on inner transformation.
The Short Answer:
INFJ (Introverted-Intuitive-Feeling-Judgment) is the most complex Myers-Briggs Personality Type. Are you curious if you belong to the most complex personality type, the INFJ?