Final answer:
Constantino is most likely to experience an increase in agreeableness over the next ten years. As he transitions into adulthood, agreeableness and conscientiousness tend to increase, which aligns with improvement in managing personal and professional relationships.
Step-by-step explanation:
The personality change Constantino is most likely to undergo over the next ten years is increased agreeableness. Research has shown that agreeableness, one of the Big Five personality factors, increases with age, typically peaking between the ages of 50 and 70. This factor involves traits like being kind, sympathetic, cooperative, warm, and considerate. As adolescents transition into adulthood, many experience a decrease in neuroticism and an increase in conscientiousness, as well as agreeableness, which aligns with their growing ability to manage personal relationships and careers more effectively.
Considering Constantino's growth trajectory and developmental stage, increased openness to experience is another possible change. However, typically, openness to experience is a trait that tends to be quite stable but can sometimes increase slightly during this period, as it is associated with curiosity, imagination, and a range of interests, which may be encouraged during college years or early adulthood.