Mother-infant interaction and the development of behavior problems in childhood

Abstract

Despite its long-standing assumption of the spread of early pottery innovated by the Late-Glacial hunter-gatherers in Japan, cultural diffusion as an explanatory model has not explicitly tested. This study addresses the question of the extent to which cultural diffusion played a role in proliferating the innovated early pottery technology across the Japanese Archipelago by employing the distance decay model of cultural diffusion. Based on the assembled dataset of the Late-Glacial assemblages with early pottery radiocarbon dates, distances between the presumed core where the earliest dates were obtained (i.e., Odaiyamamoto I) and the adopted sites do not exhibit the time-progressive pattern. In contrast, frequencies of potsherds relative to lithic artifacts increases as time progressed, implying that early pottery technology was gradually accumulated nearly by the end of the Younger Dryas, ca, 11,000 cal. BP. This study demonstrates that cultural diffusion does not fully explain the emergence and spread of early pottery in Japan, while the Late-Glacial travel and exchange networks enabled hunter-gatherers to transmit and accumulate knowledge of pottery use.