The natural history of change in intellectual performance: who changes? How much? Is it meaningful?

Published

Journal Article

A prerequisite step for studying the magnitude and meaning of IQ change is to distinguish between true IQ change that is a researchable phenomenon and IQ "change" that can be accounted for by measurement error. We studied the reliability, magnitude and meaning of IQ change using scores on the WISC--R obtained from a representative sample of 794 children at ages 7, 9, 11 and 13. The findings suggest that, in the majority of children, IQ change is either negligible in amount, unreliably measured or both. In a nontrivial minority of children, naturalistic IQ change is marked and real, but this change is variable in its timing, idiosyncratic in its source and transient in its course. We discuss the implications of these findings for interventions that aspire to improve IQ scores.

Full Text

Duke Authors

Cited Authors

  • Moffitt, TE; Caspi, A; Harkness, AR; Silva, PA

Published Date

  • May 1993

Published In

Volume / Issue

  • 34 / 4

Start / End Page

  • 455 - 506

PubMed ID

  • 8509490

Pubmed Central ID

  • 8509490

Electronic International Standard Serial Number (EISSN)

  • 1469-7610

International Standard Serial Number (ISSN)

  • 0021-9630

Digital Object Identifier (DOI)

  • 10.1111/j.1469-7610.1993.tb01031.x

Language

  • eng