The study examined the relation of language use and logical thought to social experience with both age and class held constant. The primary assumptions under study were: that the logic of symbolic grouping was highly sensitive to a child's experience with the objects to which that logic was applied; that the existence of diglossia in a bilingual community and/or relative shifts in language dominance might create a situation of language specialization by domain, particularly along the dimension of immediacy and distance; that the content of grouping (those final organizations produced by the logic) was a far more stable aspect of cognition than the logic used to construct it. The study was conducted in a fourth grade classroom in a bilingual school in Las Vegas, New Mexico. All of the children had Spanish surnames. Twenty-eight children took part in an extensive set of interviews in two languages. These interviews were designed to examine inter-relations of language use and the logic and content of symbolic grouping to social experience. Findings included: the logic of grouping was related to children's experience with the objects of grouping; town children had a much narrower and more specialized portion of their experience occurring in Spanish than did the rural children; the logic of grouping employed by these children was not related to school achievement with the one exception of the clustering of the tight-loose factor in Spanish with achievement test scores. (NQ)