The document discusses two theories of personality - Eysenck's and Cattell's. Eysenck's theory evaluates personality based on extraversion, neuroticism, and psychoticism dimensions. Cattell identifies 16 primary personality traits that can be grouped into global factors like extraversion and anxiety. Both theories can be useful for personnel selection and job matching to improve employee satisfaction and organizational performance. The document encourages readers to evaluate their own personalities using online tools based on these theories.