Describes the Second International Science Study. Analyzes several variables mitigating the interpretative power of the study, including different needs and agendas, cultural bias, equivalence of data, data analysis, student retention rates, comparability of target populations, and test validity. (YP)

Whether or not the spatial cognitive development of students from distinct social-cultural milieus, specifically Anglos from the southwestern part of the United States and Native Turks, would proceed along approximately the same lines was investigated. The overall findings tend to indicate that at times the acquisition of spatial structures may be…