What IQ Tests Test

  title={What IQ Tests Test},
  author={Ken Richardson},
  journal={Theory \& Psychology},
  pages={283 - 314}
As we approach the centenary of the first practical intelligence test, there is still little scientific agreement about how human intelligence should be described, whether IQ tests actually measure it, and if they don't, what they actually do measure. The controversies and debates that result are well known. This paper brings together results and theory rarely considered (at least in conjunction with one another) in the IQ literature. It suggests that all of the population variance in IQ scores… 

Figures from this paper

Does IQ Really Predict Job Performance?
It is concluded that considerable caution needs to be exercised in citing correlations of around 0.5 as evidence of test validity, and as justification for the use of the tests in developmental studies, in educational and occupational selection and in research programs on sources of individual differences.
Measurement of mental attention: Assessing a cognitive component underlying performance on standardized intelligence tests
AbstractDespite the widespread use of standardized IQ tests to measure human intelligence, problems with such measures have led some to suggest that better indices may derive from measurement of
Intelligence and academic performance: Is it all in your head?
Interplay between IQ, academic performance, and brain connectivity with behavioral and functional MRI data collected from undergraduate students as they completed an active learning or lecture-based semester-long university physics course provides evidence that physics classroom environment and pedagogy may have a gendered influence on students’ performance.
The Relational Abilities Index+: Initial Validation of a Functionally Understood Proxy Measure for Intelligence
Investigation of the validity and utility of the RAI+ aims to investigate its degree of correlation with well-established assessments of intelligence, numeracy, and educational attainment, and results indicate that the RAi+ displays considerable efficacy in predicting intellectual performance and numeracy but not educational attainment.
US Public Perceptions of an Intelligence Quotient Test Score Gap Between Black Americans and White Americans
Intelligence quotient (IQ) is a common measure of intelligence that associates with many important life outcomes. Research over several decades has indicated that the average IQ test score among
What Do Test Score Really Mean? A Latent Class Analysis of Danish Test Score Performance
Latent class Poisson count models are used to analyse a sample of Danish test score results from a cohort of individuals born in 1954–1955, tested in 1968, and followed until 2011. The procedure
Spearman’s g Found in 31 Non-Western Nations: Strong Evidence That g Is a Universal Phenomenon
Results show that g appears in many cultures and is likely a universal phenomenon in humans.
Assessing the Effect of Culture on Theory of Mind Performance in South African Students
Theory of mind (TOM) is the ability to infer another person’s beliefs, desires and feelings. TOM is believed to be a universal ability. However research has indicated differences in TOM development
The equal environments assumption of classical twin studies may not hold.
It is shown that the most crucial of these, namely, the equal environments assumption (EEA), may not hold and differences in twin correlations might be at least partly explained by treatment effects from parents, teachers, peers, and so on.
Variables in Psychology: A Critique of Quantitative Psychology
  • A. Toomela
  • Psychology
    Integrative psychological & behavioral science
  • 2008
In this article different kinds of information that can be represented in variables are described and it is shown how informational ambiguity of variables leads to problems of theoretically meaningful interpretation of the results of statistical data analysis procedures in terms of hidden mental processes.


IQ gains over time: Toward finding the causes.
T chapter describes the magnitude, pattern, duration, and prev­ alence of IQ gains over time. Its u ltimate purpose is to suggest and evaluate research strategies that might generate promising causal
Successful intelligence: finding a balance
What one intelligence test measures: a theoretical account of the processing in the Raven Progressive Matrices Test.
The cognitive processes in a widely used, nonverbal test of analytic intelligence, the Raven Progressive Matrices Test (Raven, 1962), are analyzed in terms of which processes distinguish between
Intelligence and ‘Inspection Time’
In recent years it has been widely believed that IQ tests are intrinsically ‘arbitrary’: in so far as IQ tests reflect any real differences between people at all, these differences are said to
Intelligence as the Tests Test It.
If you take on of the ready-made tests of intelligence and try it on a very large number of persons, you will find that they succeed with it in very different degrees. Repeat the test, and you will
Theoretical and Technical Issues in Identifying a Factor of General Intelligence
A main thrust of Herrnstein and Murray’s The Bell Curve 1 was to describe the role of intelligence in American society, or, in particular, the role of the famous g factor originally postulated by
Measurement in Psychology
IN the opening paragraph of “Psychology Down the Ages”, Prof. C. Spearman concludes a list of difficulties facing any who seek to define psychology, with the questions: “Do the data at its disposal
The IQ Question
If a child does badly at school, lagging behind other children in learning to read, being assigned to lower streams or classes, failing exams and finally leaving school at 16 with few if any