According to Howard Garner and his theory of multiple intelligences, "people vary in their ability levels across different domains of intellectual skill" (Psychology, pg 322). According to his criteria, Gardner developed eight different intelligences: linguistic, logico-mathematical, spatial, bodily-kinesthetic, interpersonal, intrapersonal, naturalistic, and, of course, musical. Under Gardner's theory, Taylor Swift, a popular, successful musician, contains great musical intelligence.
Gardner's theory of multiple intelligences is widely supported by the scientific community. Most agree with Gardner in that an individual's strengths and weaknesses vary among other individuals'. However, Gardner's theory is almost impossible to test, and therefore, violates the rule of falsifiability. Because of this, Gardner's theory of multiple intelligences cannot be proved.
Despite its violation of the rule of falsifiability, Gardner's theory has been applied in classrooms across the country. Using Gardner's theory, teachers work around a student's difficulties or deficits by utilizing their individual "intelligence type". While this appears to be beneficial to the student and their development, I believe it could also have damaging effects. Instead of strengthening a known deficit and building upon and acquiring a new "intelligence type", the student would only be practicing a known intelligence type. In order to ensure that a student is well rounded in their academics, I believe it is important to strengthen those intelligences that the student is not yet fully developed in.