Final answer:
Personality traits can change over time and are influenced by genetics and environmental factors. The Five Factor Model identifies five dimensions of personality that are relatively stable over the lifespan.
Step-by-step explanation:
Research on personality traits has demonstrated that they can change over time. Personality traits are relatively consistent patterns of thought and behavior, but they are not fixed from birth. Many studies have shown that personality traits are influenced by both genetics and environmental factors. For example, the Five Factor Model of personality identifies five dimensions of personality: openness, conscientiousness, extraversion, agreeableness, and neuroticism, and these traits have been found to be relatively stable over the lifespan.