Howard Gardner's theory of Multiple Intelligence proposes that there are nine distinct types of intelligence, each reflecting different ways of interacting with the world. Introduced in 1983 and expanded in subsequent years, Gardner's framework challenges the traditional notion of a single, generalized intelligence.

1. Verbal-linguistic Intelligence: This intelligence involves the ability to think in words and use language to express ideas. Careers that align with this intelligence include authors, journalists, and speakers.
2. Logical-mathematical Intelligence: This intelligence enables an individual to carry out mathematical operations and think logically. Occupations such as scientists, engineers, and accountants typically reflect strengths in this area.
3. Spatial Intelligence: The ability to think three-dimensionally characterizes this intelligence. Architects, artists, and sailors are often examples of those who excel in spatial reasoning.
4. Bodily-kinesthetic Intelligence: This type of intelligence involves using the body effectively to manipulate objects and perform physical tasks. Surgeons, craftspersons, dancers, and athletes are examples of this type of intelligence.
5. Musical Intelligence: Individuals with a high level of musical intelligence are sensitive to pitch, melody, rhythm, and tone. This intelligence is prominent among composers and musicians.
6. Interpersonal Intelligence: This intelligence involves understanding and interacting effectively with others. Teachers and mental health professionals often exhibit strong interpersonal skills.
7. Intrapersonal Intelligence: This is the capacity to understand oneself, including one's thoughts and feelings. Theologians and psychologists are examples of professions where intrapersonal intelligence is crucial.
8. Naturalistic Intelligence: The ability to observe patterns in nature and understand natural and human-made systems is the essence of naturalistic intelligence. Farmers, botanists, and ecologists typically exhibit this form of intelligence.
9. Existential Intelligence: This intelligence involves grappling with deep questions about human existence, such as the meaning of life. Although not tied to a specific occupation, philosophers often explore these concepts.

Gardner's interpersonal and intrapersonal intelligence have sometimes been grouped under the broader concept of Emotional Intelligence (EI). EI, popularized by Daniel Goleman, involves understanding and managing emotions in oneself and others. While some consider EI to be a better predictor of success than traditional intelligence, it also faces scrutiny regarding its definition and measurement.

Gardner argues that everyone possesses all these intelligences to varying degrees, and individuals learn best when teaching methods align with their dominant intelligences. Despite its popularity in education, Gardner's theory has faced criticism from cognitive psychologists due to a lack of empirical evidence. However, it remains influential, particularly in educational settings, because it resonates with the democratic idea that everyone can excel in some way.