The names most associated with trait theory of personality are c) Gordon Allport and Raymond Cattell.
Trait theory focuses on the identification and measurement of traits, which are considered to be consistent patterns of thoughts, feelings, and behaviors. Gordon Allport was one of the first psychologists to study personality traits, and he emphasized the unique aspects of individuals’ personalities. Raymond Cattell expanded on this by introducing the concept of measuring traits through factor analysis, which helped in identifying the source traits that contribute to individual personalities. Together, their work laid the foundation for understanding personality dimensions and how they influence behavior.