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Cynthetiq: There are many ways to control for culture using the scientific method and culutral universality has become a measure of the quality of theories. As for the lack of replication, all published tests that are approved by the A.P.A. must meet certain requirements. Among those is that they clearly identify the reliability and validity coefficients of their test. A prime example of a culturally universal test is the WAIS (Wechsler adult intelligence scale). I cant cite exact numbers without getting access to one (which I can do if you would like), but I am pretty sure the reliability coefficient of the WAIS has consistently been shown to be above .95 even cross culturally.
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