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Charles Spearman-General Intelligence

  • Though intelligence is a most sought after subject in psychology, no one has been able to define what intelligence exactly is. Some say it is one single attribute in a person while others argue that it is a combination of many abilities and skills.
  • British psychologist Charles Spearman (1863 - 1945) gave a concept of general intelligence or what he better called g factor. He performed certain tests on different persons and was surprised to find the results. He found that people who …

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Vernon’s hierarchical model

Philip Vemon stated that when skills and factors are arranged in an ascending order in consecutive order, it is intelligence. The factor which forms the highest form of hierarchy is composed of two skills verbal/academic and practical/mechanical, each having subdivision. (Verbal/academic, e. g. , includes vocabulary and verbal fluency).

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Ranges of Intelligence Scores

The range of intelligence can be given by extremely gifted less the disabled personality.

  • Children having IQ below 70 are labeled as disabled or mentally retarded. Even within this, extremities have been defined. IQ between 50 to 70 have mild disability while between 30 to 50 have moderate disability, severe disability is said to have occur between IQ levels of 20 to 35 and the severity is profound below 20 IQ level. The causes of these children being retarded may be down syndrome, …

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