Against the background of an unchanging sequence of representational development, we demonstrate that implicit processes of learning and cognition can change from one historical period to another. One generation of Zinacantec Maya children was studied in 1969 and 1970, the next generation in 1991 and 1993. In the intervening two decades, the community, located in Chiapas, Mexico, was involved in a transition from an economy based primarily on subsistence and agriculture to an economy based primarily on money and commerce. A naturalistic study of weaving apprenticeship and an experimental study of visual representation showed that the ecological transition was linked to greater emphasis on independent cultural learning, abstract representation, and innovation, and, correlatively, a movement away from scaffolded guidance, detail-oriented representation, and imitative representational strategies. These changes constituted automatic adaptations with an implicit nature. In addition, historical variability in implicit modes of cultural apprenticeship predicted shifts in implicit processes of child and adolescent cognition. In sum, socialization and development are not fixed but adapt, in a coordinated way, to changing ecological conditions. (C) 2003 Elsevier Inc. All rights reserved.
