AbstractThe present study investigated the internal consistency reliability estimates of the Raven Coloured Progressive Matrices (CPM) for Anglo and Mexican‐American third‐grade boys from low socioeconomic status background. The results showed that the reliability estimates of the CPM for the two ethnic groups were acceptably high and extremely similar in magnitude. In light of these findings, plus previous cross‐cultural reliability studies of the CPM, it appears that the CPM is a promising nonverbal intelligence measure when used with children of culturally and linguistically diverse backgr