Fortin Morales, A. M., van de Vijver, F. J. R., & Poortinga, Y. H. (2014). Differential Item Functioning and Educational Risk Factors in Guatemalan Reading Assessment. Revista Interamericana De PsicologĂ­a/Interamerican Journal of Psychology, 47(3). https://doi.org/10.30849/rip/ijp.v47i3.236