IQ test bias

From the Bell Curve debate to race-IQ disputes and test bias allegations, explore why intelligence research remains one of science's most contested fields -- and what the evidence actually shows.

Children from low-SES families score 12-18 IQ points lower on average. Research on Head Start, Perry Preschool, and the Abecedarian Project reveals how poverty shapes cognitive development -- and what interventions actually work.

Examine how cultural bias, socioeconomic disparities, and structural factors affect IQ test scores. Review key fairness research, DIF analysis methods, and practical solutions for equitable testing.

Explore how culture-fair IQ tests like Raven's Matrices and Cattell's CFIT attempt to reduce cultural bias, what cross-cultural research reveals about their effectiveness, and why no test can be entirely culture-free.