We present the first large-scale, quantitative examination of mind and body concepts in a set of historical sources by measuring the predictions of folk mind–body dualism against the surviving textual corpus of pre-Qin (pre-221 BCE) China. Our textual analysis found clear patterns in the historically evolving reference of the word xin (heart/heart–mind): It alone of the organs was regularly contrasted with the physical body, and during the Warring States period it became less associated with emotions and increasingly portrayed as the (...) unique locus of “higher” cognitive abilities. We interpret this as a semantic shift toward a shared cognitive bias in response to a vast and rapid expansion of literacy. Our study helps test the proposed universality of folk dualism, adds a new quantitative approach to the methods used in the humanities, and opens up a new and valuable data source for cognitive scientists: the record of dead minds. (shrink)

Recent research observed a sensitive window, at about 14 years of age, in the acculturation rates of Chinese immigrants to Canada. Tapping an online sample ofusimmigrants, we tested these relationships in a broader population and explored connections with new potentially causally related variables: formal education, language ability and contact with heritage-culture and mainstream United States individuals, both now and at immigration. While we found that acculturation decreased with age at immigration and increased with years in theus, we did not observe (...) a similar sensitive window. We also present an exploratory path analysis, exposing the relationships in our sample between acculturation and the variables above. The novel relationships documented here can improve theorising about this rich and complex empirical phenomenon. (shrink)

We examined the universality of the curse of knowledge by investigating it in a unique cross-cultural sample; a nomadic Nilo-Saharan pastoralist society in East Africa, the Turkana. Forty Turkana children were asked eight factual questions and asked to predict how widely-known those facts were among their peers. To test the effect of their knowledge, we taught children the answers to half of the questions, while the other half were unknown. Based on findings suggesting the bias’s universality, we predicted that children (...) would estimate that more of their peers would know the answers to the questions that were taught versus the unknown questions. We also predicted that with age children would become less biased by their knowledge. In contrast, we found that only Turkana males were biased by their knowledge when inferring their peers’ perspectives, and the bias did not change with age. We discuss the implications of these findings. (shrink)

The target article misunderstands the research program it criticizes. The work of Boyd, Richerson, Fehr, Gintis, Bowles and their collaborators has long included the theoretical and empirical study of models both with andwithoutdiffuse costly punishment. In triaging the situation, we aim to (1) clarify the theoretical landscape, (2) highlight key points of agreement, and (3) suggest a more productive line of debate.

We respond to several important and valid concerns about our study (“The Prevalence of Folk Dualism in Early China,”Cognitive Science 35: 997–1007) by Klein and Klein, defending our interpretation of our data. We also argue that, despite the undeniable challenges involved in qualitatively coding texts from ancient cultures, the standard tools used throughout the cognitive sciences—large quantities of data, coders as blind to the hypothesis as possible, intercoder reliability measures, and statistical analysis—allow the noise of randomly distributed interpretative differences to (...) be distinguished from the signal of genuine historical patterns. (shrink)