This paper reports an analysis of descriptions of children with IQs of 155 or better. It is suggested that these children be distinguished from gifted children by the label exceptionally gifted. The paper reports some important cognitive differences between the two groups as well as the high rate of early parental loss among historically famous highly intelligent persons. This finding is discussed in the light of how certain parent-child relationships might contribute to the development of cognitive giftedness into high level of creative behavior.
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Robert S. Albert (1971) studied this question.
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