Current models of signal evolution explain diversity by invoking a variety of social, perceptual and environmental factors. Social systems and spacing patterns determine the active space of signals and their function. Receiver sensory systems and habitat characteristics interact to constrain signal design. These factors are traditionally implicated in promoting directional evolutionary change, ...

The concept of ‘community’ has a deep genealogy, extending from the classical social science literature of the nineteenth century to its wide and confused employment in policy contexts and textual analyses discourses. This paper will focus on one aspect of community whose lineage extends theoretically from the communal concept of a ‘consciousness of kind’. In the desert community of Mt Liebig, ...

Understanding the behavioral and psychological mechanisms underlying social behaviors is one of the major goals of social evolutionary theory. In particular, a persistent question about animal cooperation is to what extent it is supported by other-regarding preferences-the motivation to increase the welfare of others. In many situations, animals adjust their behaviors through learning by respon...

What is the evolutionary origin of the human ability to understand and predict the behavior of others? Recent studies suggest that human infants' early capacity for understanding others' goal-directed actions relies on nonmentalistic strategies [1-8]. However, there is no consensus about the nature of the mechanisms underpinning these strategies and their evolutionary history. Comparative studi...

Evolution of a particular social community can be represented as a sequence of events (changes) following each other in the successive timeframes within the temporal social network. In other words, the evolution is described by identified group transformations from time Ti to Ti+1 (i is the period index). There are several approaches to definition of possible events in the social group evolutio...

Moral norms are the rules of morality, those that people actually follow, and those that we feel people ought to follow, even when they don’t. Historically, the social sciences have been primarily concerned with describing the many forms that moral norms take in various cultures, with the emerging implication that moral norms are mere arbitrary products of culture. Philosophers, on the other ha...

A number of studies have investigated the roles played by individual and social learning in cultural phenomena and the relative advantages of the two learning strategies in variable environments. Because social learning involves the acquisition of behaviours from others, its utility depends on the availability of 'cultural models' exhibiting adaptive behaviours. This indicates that social netwo...

Representing and reasoning about the social universe is a major task for the young child, one that almost certainly involves specialized knowledge structures. Individuals in interaction are fundamental elements of sociality, and, unsurprisingly, evolution has prepared children with special-purpose mechanisms for drawing attention to and processing information about persons. Social aggregates ar...

Predation risk is a major ecological factor selecting for group living. It is largely ignored, however, as an evolutionary driver of social complexity and cooperative breeding, which is attributed mainly to a combination of habitat saturation and enhanced relatedness levels. Social cichlids neither suffer from habitat saturation, nor are their groups composed primarily of relatives. This demand...

BACKGROUND The criteria for stopping Delphi studies are often subjective. This study aimed to examine whether consensus and stability in the Delphi process can be ascertained by descriptive evaluation of trends in participants' views. METHODS A three round email-based Delphi required participants (n = 12) to verify their level of agreement with 8 statements, write comments on each if they con...