Normative data for 8-15 year olds for the Standard Progressive Matrices in Saudi Arabia were obtained in 1977 and 2010. The 2010 sample obtained higher average scores than the 1977 sample by 0.78d, equivalent to 11.7 IQ points. This represents a gain of 3.55 IQ points a decade over the 33 year period. (Contains 1 table.)

Every widely used psychological assessment instrument is under scrutiny in terms of cultural fairness. The expectation of the reduced-language (Nonverbal) section of the Stanford-Binet Intelligence Scales, Fifth Edition (SB5; Roid, 2003) is that language ought not to be a modifying factor in terms of final score. The purpose of the present study…

Applied reliable component analysis (RCA) to the normative data (2,100 children and adolescents) for the Universal Nonverbal Intelligence Test (UNIT) (A. Bracken and R. McCallum, 1998) to allow for the computation of reliable uncorrelated memory and reasoning scores. RCA sores were highly replicable, had good convergent validity, and had greater…