The purpose of this study was to examine whether orrnnot scores on Raven's Standard Progressive MatricesrnTest, a 'culture-fair' measure of general mental ability,rnare affected by cultural and environmental influences.rnThe Raven's Standard Progressive Matrices Testrn(1958) Was therefore, administered to 599, Seventh;rnninth-, and eleventh-grade Ethiopian students who hadrna considerably heterogeneous. cultural and environmentalrnexperiences. It was hypothesized that, the mean scoresrnobtained on the Raven's Standard Progressive MatricesrnTest would not be different when the subjects arerngrouped under type of schooling, socioeconomic status,rngrade level and sex.rnDifferent levels of factorial designs were employedrnto examine group mean differences, and simple andrnpartial correlations were computed in examining relatio~shipsrnbetween the Raven's Test and the treatmentrnvariables.rnThe results of the study indicated that, meanrnscores on the Raven's Test vary significantly with typernof schooling, SES, and grade level. No significantrnmean difference was obtained for sex. In addition, veryrnlow but significant correlations were obtained betweenrnthe Raven's Test and the treatment variablea exceptrnwi th sex.rnThe results generally support the previous. findingsrnobtained in other contexts, and suggest that the Baven'srnTest is not a 'culture-fair' test of general mentalrnability. Future. research may be undertaken to findrnout the effect of factors considered in this study andrnother factors with regard to the usefulness of thernRaven's Test, more specifically the influence ofrnenvironmental experiences and academic achievement onrnthe Bevan Test.