Social/cultural learning is an effective way to reduce uncertainty about the environment,
helping individuals adopt an adaptive behavior cheaply. Although this is evident for learning …

Laughter is a nonverbal vocal expression that often communicates positive affect and
cooperative intent in humans. Temporally coincident laughter occurring within groups is a …

How should groups make decisions? The authors provide an original evaluation of 9 group
decision rules based on their adaptive success in a simulated test bed environment. When …

In our digital and connected societies, the development of social networks, online shopping,
and reputation systems raises the questions of how individuals use social information and …

… Taken together, these results illustrate the general advantages of social sharedness (Kameda,
1994) and support … The summary results are available from Tatsuya Kameda on request. …

Although much of the research on small groups in social psychology has emphasized cognitive,
information-processing tasks (decision-making and problem solving), only recently have …

It is often taken for granted that social/cultural learning increases human adaptability, because
it allows us to acquire useful information without costly individual learning by trial and error…

Although norms can potentially serve useful constructs to understand human minds, being
fundamentally social in evolutionary as well as cultural senses, there are as yet no useful …

In humans and other gregarious animals, collective decision-making is a robust behavioural
feature of groups. Pooling individual information is also fundamental for modern societies, …

… Correspondence conceming this article should be addressed to Tatsuya Kameda, Department
of Social Psychology, Faculty of Letters, University of Tokyo, Hongo, Bunkyo-ku, Tokyo …