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This volume begins with two chapters that draw on evolutionary sociology to advance our understanding of interpersonal processes and their role in social organization. In “The Biology and Neurology of Group Processes,” Jonathan H. Turner and Alexandra Maryanski draw on three areas of evolutionary sociology (cladistic analysis, comparative neuroanatomy, and ecological analysis) to show how understanding the selection pressures acting on the brain over millions of years can help us get a better grasp on the biologically based capacities and propensities that are involved in group processes such as role-taking and role-making. An improved understanding of these processes means better explanations of how humans create, sustain, and change social structures and culture – topics that lie at the core of sociological inquiry. At the same time, Turner and Maryanski's chapter will give sociologists much to think about and debate, as one of the main conclusions of their argument is that neurology explains human capacities to develop non-kin groups more than culture. The next chapter entitled “Sacrifice, Gratitude, and Obligation: Serial Reciprocity in Early Christianity,” by Richard Machalek and Michael W. Martin, may be seen as giving more equal explanatory weight to culture and biology in a theoretical analysis that combines a focus on cognitive processes (historically unique meanings and ideas) with evolutionary sociological insights about emotions in order to generate better explanations of complex socio-historical developments. Specifically, Machalek and Martin extend Rodney Stark's analysis of how ideas contributed to the rise of Christianity by showing how the evolved features of human emotionality related to “paying it forward” (or serial reciprocity in more formal terms) may have also played an important role in this historical process. Both chapters provide excellent examples of the value of combining multiple theoretical perspectives and paying attention to the interplay of social and biological forces.

Purpose – The purpose of this chapter is to demonstrate how biosociologists can further the understanding of Autism Spectrum Disorders by combining neurology's knowledge of the brain with social scientific knowledge about paraverbal communication and interactional synchrony.

Findings – We theoretically analyze Autism Spectrum Disorders through the lens of neurosociology and develop a research agenda centered on relationships among brain function, interactional symmetry, and autism. We also derive an intervention model involving the artificial manipulation of speech communication. In our analysis we draw attention to multidisciplinary research on vocal and behavioral synchrony and demonstrate how this knowledge contributes to a neurosociological understanding of autism.

Research limitations/implications – We synthesize diverse programs of research from multiple fields and innovate a neurosociological approach to understanding biosocial interaction rituals in relation to autism. We discuss the potential use of “dichotic filtration” of speech to enhance communication efficacy for individuals with autism.

Practical implications – Our arguments suggest that the social difficulties faced by individuals with autism may be rooted in problems associated with the cerebral processing of paralanguage. As a potential remedy for these problems, we suggest an intervention method based on recent technological advancements stemming from decades of theoretical and empirical research.

Social implications – To the extent that the proposed intervention model proves successful, it will enhance the lives of individuals with autism and those with whom they interact by improving social communication and associated channels for creating social bonds.

Originality/value – This work is uniquely important as an example of how biosociologists might move “from bench to application” in the context of a cumulative program of interdisciplinary research, development, and technology transfer.

We review literature linking patterns of vocal accommodation in the paraverbal range of the voice to small group structures of status and dominance. We provide a thorough overview of the current state of vocal accommodation research, tracing the development of the model from its early focus on patterns of mutual vocal adaptation, to the current focus on structural factors producing patterns of unequal accommodation between group members. We also highlight gaps in existing knowledge and opportunities to contribute to the development of vocal accommodation as an unobtrusive, nonconscious measure of small group hierarchies.

We trace the empirical development of vocal accommodation as a measure of status and power, and discuss connections between vocal accommodation and two prominent theoretical frameworks: communication accommodation theory (CAT) and expectation states theory. We also provide readers with a guide for collecting and analyzing vocal data and for calculating two related measures of vocal accommodation.

Across multiple studies, vocal accommodation significantly predicts observers’ perceptions regarding interactants engaged in debates and interviews. Studies have specifically linked vocal accommodation to perceptions of relative power or dominance, but have not shown a relationship between accommodation and perceptions of prestige.

Vocal accommodation measures have clear applications for measuring and modeling group dynamics. More work is needed to understand how accommodation functions in clearly-defined status situations, how the magnitude of status differences affects the degree of accommodation inequality, and how vocal accommodation is related to other correlates of social status, including openness to influence and contributions to group tasks.