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Theories of Intelligence

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Handbook of Intellectual Disabilities

Part of the book series: Autism and Child Psychopathology Series ((ACPS))

Abstract

An extensive literature has developed over the nature of human intellectual functioning, with more than a century of research to date. This chapter surveys this field, starting with its historical roots and following the trajectory of these ideas to contemporary views on the nature and structure of intelligence. Dating back to Spearman’s and Thurstone’s original factor-analytic studies, there has been an ongoing debate as to whether intelligence is best captured by one unitary factor (psychometric g), a group of independent broad abilities, or another alternative. Whereas structural models emphasize the interrelationships among different abilities (e.g., verbal and visuospatial skills, speed of processing, etc.), conceptual theories have been more concerned with the fundamental nature of intelligence. Current issues in the field concern the origins and significance of g, the centrality of particular cognitive processes to overall intelligence, and the debate between reductive and more holistic views. The chapter concludes with an overview of the best-supported principles regarding theories of intelligence, along with their implications for intellectual disabilities.

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Notes

  1. 1.

    The name “two-factor” theory can be somewhat confusing, in the sense that it strongly emphasizes the importance of the single g factor. Nevertheless, the name refers to the assertion that any task involves contributions from two factors: g, which is common to all tasks, and s, which is unique to particular tests.

  2. 2.

    It should be noted that Thurstone himself came to recognize these issues and acknowledged the possibility of a high-order g (Carroll 1993, p. 56; Major et al. 2012, p. 544).

  3. 3.

    Although many authors have considered Carroll’s model to be a quintessential example of a hierarchical model (Deary 2000; Lubinski 2004), it has also been argued that Carroll’s view was in fact closer to the bi-factor model discussed in the next section (Beaujean 2015).

  4. 4.

    Primary simulations were based on 16 hypothetical neurocognitive processes, which were each independently sampled from pre-specified distributions to define 1000 simulated subjects. Different models specified various constraints and relationships among model parameters.

  5. 5.

    Though see Deary’s (2000, Chap. 2, and p. 68) account of several authors who espoused similar views but predated Galton

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Correspondence to Matthew J. Euler .

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Euler, M.J., McKinney, T.L. (2019). Theories of Intelligence. In: Matson, J.L. (eds) Handbook of Intellectual Disabilities. Autism and Child Psychopathology Series. Springer, Cham. https://doi.org/10.1007/978-3-030-20843-1_2

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