A theory is a set of interrelated concepts, constructs, and propositions that present a systematic view of a domain of study for the purpose of explaining and predicting phenomena.A model, on the other hand, is a heuristic device for organizing components of a domain of phenomena to show relationships between the parts and the outcome of interest. Scholars from different disciplines distinguish...

In this article, social media in the academic context is summarized, differences between social media usage patterns in China and the United States are contrasted, Research methods are described and final results are presented. Our specific contribution is to clearly delineate the unique social media ecosystem as found in Mainland China and its subsequent impact on social media as applied to ac...

Group size is a core trait defining social systems, social complexity and social structure, so understanding group-size evolution is critical to understanding the evolution of sociality. Traditional views of group-size evolution focus on ecological factors such as predation risk and physical resources, but the additional factor of time has remained largely unexplored. Time is a valuable limited...

The measurement of cardiovascular functioning targets an important bridge between social conditions and differential well-being. Nevertheless, the biocultural, psychosocial processes that link human ecology to cardiovascular function in children remain inadequately characterized. Childrearing practices shaped by parents' cultural beliefs should moderate children's affective responses to daily e...