Describe two common personality trait changes in early adulthood according to the Big Five model and why they occur.

• A. Neuroticism increases and openness increases due to stress.
• B. Conscientiousness increases and neuroticism decreases due to increasing responsibilities and role transitions.
• C. Conscientiousness decreases and openness remains constant.
• D. Agreeableness increases dramatically.

Answer: (B)

In early adulthood, a primary pattern is that people become more conscientious and emotionally steadier. As individuals take on adult roles—such as pursuing a career, managing finances, forming long-term relationships, and possibly parenting—there’s a push to organize time, set goals, follow through on commitments, and regulate one’s behavior. These experiences cultivate self-discipline, reliability, and goal-directed effort, which show up as higher conscientiousness.

At the same time, navigating these responsibilities helps people develop better coping strategies and emotional regulation, leading to fewer mood swings and less chronic worry. That shows up as a decrease in neuroticism. So the combination of taking on responsibilities and adapting to new life roles drives these mean-level changes.

This pattern reflects general maturation with age, though individuals vary. The other descriptions don’t align as well with typical long-term trends: neuroticism usually doesn’t rise with stress in the long run, conscientiousness doesn’t typically decrease, openness isn’t the main stable target in early adulthood, and dramatic jumps in agreeableness aren’t the most consistent change seen across this period.