Underlying Factors
Raven's Progressive Matrices and Vocabulary tests were originally developed for use in research into the genetic and environmental origins of “cognitive ability”. Raven felt that the tests commonly in use at that time were cumbersome to administer and the results difficult to interpret. Accordingly he set about developing simple measures of the two main components of Spearman's g. These two components are (1) the ability to think clearly and make sense of complexity, which is known as eductive ability (from the Latin root "educere", meaning "to draw out") and (2) the ability to store and reproduce information, known as reproductive ability.
Raven’s tests of both were developed with the aid of what later became known as Item Response Theory.
Read more about this topic: Raven's Progressive Matrices
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