In this article the Learning Potential Test for Ethnic Minorities (LEM) is presented. The contribution focuses on whether Turkish, Moroccan, and Duthc children aged 5 to 8 years, obtain comparable results on items and whether patterns of factor loadings are equivalent in these groups. At item level, rank order correlations of item difficulty were computed. Also, the Mantel-Haenszel procedure was used to test the suitability of each item. To examine the factor structure of the tests in each group, Tucker's φ coefficients were computed and Simultaneous Components Analysis was performed. The results demonstrate that, despite some minor deviations, the LEM measures the same abilities with children from different groups.