1. Sex differences in performance on Raven's Progressive Matrices: A review;Court;Alberta Journal of Educational Research,1983
2. Are Black scores on Raven's Standard Progressive Matrices Test an artifact of the method of test presentation?;Crawford-Nutt;Psychologica Africana,1976
3. Raising IQ level by vitamin and mineral supplementation;Eysenck,1997
4. The dynamic assessment of retarded performers;Feuerstein,1980
5. Estimating the determinants of cognitive achievement in low income countries;Glewwe,1992