Inadequacy and insensitivity of intelligence testing

Abuse of IQ evaluations
Lack of definition of intelligence
Inadequate means of measuring intelligence

Nature

The theory that there is one, over-all general kind of intelligence is not scientifically demonstrable; the profusion of intelligence testing and the assignment to an individual for most of his or her student life of an arbitrary intelligence quotient rating may be an infringement of civil liberties. Such ratings may be used to unfairly screen out students for educational programmes, or applicants for job or promotional opportunities. The tests themselves are often biased towards privileged backgrounds and the dominant ethnic culture. Thus gifted but disadvantaged individuals' scores will not reflect their capabilities.

Background

Concerns about the inadequacy and insensitivity of intelligence testing emerged globally in the early 20th century, particularly as standardized IQ tests proliferated in education and employment. Initial adoption exposed cultural, linguistic, and socio-economic biases, sparking international debate during the civil rights movements of the 1960s and 1970s. Subsequent cross-cultural studies and legal challenges underscored persistent inequities, prompting ongoing scrutiny of intelligence assessments’ validity and fairness in diverse societal contexts.

Incidence

The inadequacy and insensitivity of intelligence testing impact educational placement, employment opportunities, and social mobility on a global scale. Standardized intelligence tests are frequently critiqued for systemic biases that disadvantage individuals from marginalized cultural, linguistic, and socio-economic backgrounds. As these tests are widely used in schools and workplaces worldwide, millions are affected annually, leading to widespread questioning of their validity and fairness in diverse populations.
In 2023, controversy arose in the United States after a school district in Texas used outdated IQ assessments for determining special education services, resulting in numerous minority students being misclassified and denied adequate support. This case reignited national debate over test bias.

Claim

Aptitude, intelligence and general ability testing are inseparable phenomena illustrating the belief that human nature and human potential are fully understood by scientists; that they can be classified in 7, 13, 22, or 66 categories, and individuals pigeon-holed according to their predominant top scores. These premises underlie a large amount of educational thinking that seeks an assembly-line efficiency by putting students on the supposed right track in accordance with their abilities at the earliest age. Such educational perspectives accord very well with state politics, centrally-controlled social behaviour, and 'scientific' human breeding programmes. Intelligence testing has been turned into a tool for role modification if not for behaviour modification, and is one of the growing techniques for the factory-farming of human beings.

Counter-claim

Identical twins separated at or soon after birth have IQs which correlate higher than either the IQs of ordinary siblings reared apart or the IQs of fraternal twins reared together. This suggests that, according to some studies, genetic factors account for nearly 60% of the variability in IQs. Most experts in the field, while agreeing that there is no adequate understanding of the nature of intelligence, believe IQ tests measure something that can be reasonably called general intelligence. IQ tests also predict reasonably well the academic and job performance of both blacks and whites suggesting that they are not culturally biased.