What term does Cattell use for traits that lie at a deeper level of personality and must be inferred?

Cattell referred to traits that lie at a deeper level of personality and must be inferred as source traits. Source traits are fundamental characteristics that underlie more visible behaviors, known as surface traits. While surface traits can be observed and measured directly, source traits require deeper analysis and understanding to uncover, as they are not immediately apparent in an individual's behavior. Cattell's theory suggests that these source traits form the foundation of personality and can explain and predict behavior more effectively than surface traits can. This differentiates them from other concepts, which might focus on observable characteristics or different aspects of personality that do not necessarily delve into the underlying structures. Understanding source traits is crucial for a comprehensive grasp of personality, as they represent the core drivers of our actions and responses.