Abstract
In the present study, the Luria-Nebraska and the Halstead-Reitan Neuropsychological Test batteries were administered to 112 male and female Arabic and English speaking Egyptians enrolled at the American University in Cario. The aims of the study were to establish normative data, test the effects of language and order of administration upon performance, and examine practice effects and test-retest reliability of the two batteries. Only minimal differences Wdre found between the Arabic and the English administrations. Results revealed strong test-retest reliability coefficients for the HRB and moderate ones for the LNNB. Practice effects were detected on six LNNB scales as well as on the HRB complex problem solving tests (Category and Tactual Performance Test). No other effects were detected. Thus, the initial performance on one battery did not interfere with nor enhance performance on the other battery.