Charles Edward Spearman

Charles Edward Spearman (1863-1945) studied psychology in Germany and received his PhD at Leipzig. Spearman is noted as a pioneer in psychology and believed in the two-factor theory of intelligence. He wrote his first paper outlining this theory in 1904 with Bernard Hart (Gregory, 1987). Spearman claimed that testing a persons abilites to complete tasks against expected outcomes could be measured and expressed in a mathemactical formula, that mathematical formula is now known as the Tetrad Equation. Spearman believed the results of this mathematical equation could be considered ones intelligence. Spearman believed each ability result could be divided into two factors; first, the general factor or other wise referred to as "g" and the second, the specific factor. The general factor states that if tasks required a similar ability the same expectance of results for one individual remains the same. And the variation of expectance from the ability to another is the specific factor. Spearman hypothesized that if a person did well on an intelligence test that the questions requiring a related task would be similar in score and for the tasks on the test that require a particularly different ability a specific factor is involved in acquiring the answer. With the combination of these factors Spearman was able to determine ones intelligence. Many psychologists disagreed with Spearman's Model of Intelligence.

Howard E. Gardner a more recent addition to psychology formulated a definition and criteria of multiple intelligences. Howard Gardner wrote of his first existence of this theory in 1979 on a grant from the Bernard Van Leer Foundation of the Netherlands (Gardner, 1999). The outcome of this grant assisted Gardner in writing the Frames of Mind: The Theory of Multiple Intelligences (1983). The Multiple Intelligence Theory explains seven types of intelligence and Gardner is currently exploring three additional types. In order for Gardner to accept a type of intelligence it must meet eight criteria designed by Gardner. The eight criteria are broken into four groups, the first group, Biological Sciences, contain the first and second criteria, first, the potential of isolation by brain damage and second, an evolutionary history. The second group, Logical Analysis, explains the third and fourth criteria, three, an identifiable core operation and four, susceptibility to encoding in a symbol system. Group three, Developmental Psychology and contains number five and six of his criteria, five, a distinct developmental history and six, the existence of idiot savants, prodigies, exceptional persons. And finally the fourth group contains number seven and eight of Gardner's criteria. Seven, supported from experimental psychological tasks and eight, support from psychometric findings (intelligence tests).

Based on the eight criteria Gardner identified his seven intelligences. Nubmer one, Linguistic Intelligence, the ability to learn, speak and write language. Number two, Logical-Mathmatical Intelligence, the ability to solve math equations and solve problems. These first two intelligences are most valued in school (Gardner, 1999). Number three, Musical Intelligence, having skill a in performing and recognizing a musical pattern. Number four, Bodily-Kinesthetic Intelligence, the ability to use you body or needed part of your body to complete a task or solve problems. Number five,