1. Court, J. H., & Raven, J. (1995). Manual for Raven’s Progressive Matrices and Vocabulary Scales. Section 7: Research and references: Summaries of normative, reliability, and validity studies and references to all sections. Oxford: Oxford University Press; San Antonio, TX: The Psychological Corporation.
2. Crawford, J. R., Deary, I. J., Starr, J., & Whalley, L. J. (in press). The NART as an index or prior intellectual functioning: A retrospective validity study covering a 66 year interval. Psychological Medicine.
3. Deltour, J. J. (1993). Echelle de Vocabulaire Mill Hill de J. C. Raven: adaptation française et normes comparées du mill hill et du standard progressive matrices (PM38). Manuel et annexes. Braine le Château, Belgium: Editions L’Application des Techniques Modernes SPRL.
4. Eysenck, H. J. (1953). Uses and abuses of psychology. Harmondsworth, UK: Penguin.
5. Flynn, J. R. (1984). The mean IQ of Americans: Massive gains 1932 to 1978. Psychological Bulletin, 95,29–51.