The document discusses several career development theories including trait-oriented theories, trait-and-factor theory, and Holland's theory. Trait-oriented theories focus on matching individual traits to job requirements. Trait-and-factor theory, influenced by Parsons, maintains that career guidance is achieved by studying individuals, surveying occupations, and matching people to jobs. Holland's theory proposes that people are attracted to careers that match their personalities, and introduced the RIASEC model to categorize career fields and personality types. The document also discusses implications for counselors, such as relying too heavily on assessments and having a static view of careers.