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Some symbollic language talents are developed at University end of this stage. 2. Pre operational stage Toddler and Early Childhood. In this period, intelligence is verified through University use of symbols, language use matures, and memory and creativeness are built, but considering is done in quizzes nonlogical, nonreversable manner. Egocentric considering predominates. 3. This later Spearman Holzinger model was identical exam Carrolls hierarchical three stratum theory, except that it covered only University top two stratathe specific group elements and University g factor Roid, 2003. Besides, Thurstone 1938 identified seven basic mental potential: verbal, word fluency, number facility, spatial visualization, reasoning, memory and perceptual speed. Carroll 1993 indicated that University modern three stratum model was quizzes direct outgrowth of Thurstones 1947 method of successive factorization of correlation matrices at higher orders. In quizzes multidimensional scaling reanalysis of Thurstones data performed by Snow, Kyllonen, and Marshalek 1984, three superordinate clusters of testsverbal, spatial, and quantitativewere identified Roid, 2003. In an alternate hierarchical model, Vernon 1961 described quizzes superordinate g factor and two lower order factors called v:ed verbal educational capability and k:m mechanical spatial skill. The v: ed subdivides into verbal and numerical, while k:m subdivides into space capability, manual ability and mechanical guidance.

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