1. Twin resemblances in cognitive abilities in an Egyptian sample;Abdel-Rahim;Behavior Genetics,1990
2. Effects of inbreeding on Raven Matrices;Agrawal;Behavior Genetics,1984
3. Individual differences in process outcomes for analogy and classification solution;Alderton;Intelligence,1985
4. School sector and cognitive performance;Alexander;Sociology of Education,1985
5. Pattern and action;Allport,1980