Personality development is ________.
a. the mean level change of a trait over time
b. the cross-situational consistency of a trait
c. the change in social status of an individual over time
d. the rank-order change of a trait across individuals
The answer is a, the mean level change of a trait over time, it is because a personality development focuses more on the personality of an individual and over time, the changes continue as the person or the individual grows.