A large-scale comparative study of folk songs around the world employing systematic measures (cantometrics). The aim was not just to describe variation but to test hypotheses about the relationships between song style and societal structures. Dance was also considered.

This chapter explores the relationship between cultural complexity and song. Several measures of cultural complexity are correlated with different aspects of singing. All hypotheses are supported.

The author reanalyzes hypotheses proposed by Lomax et al. (1968) that are based on Lomax's collection of cantometric data. Considering historical/regional variables, the author suggests that difusion and common history better explain certain musical features such as wordiness than functional and evolutionary processes. However, other Lomax findings are supported involving interlocked, contrapuntal singing and narrow nasal-voiced singing.

This chapter examines the relationship between singing behavior, specifically vocal rasp, and sex-role differences. Results suggest that conformity training is negatively associated with the use of vocal rasp. Results also suggest that women are more likely to sing with vocal rasp in societies where they make a more significant contribution to subsistence.

In asking whether or not there are meaningful universals in music, researchers compiled two catalogs – the Natural History of Song (NHS) Ethnography which contains ethnographic descriptions of song performances collected from eHRAF World Cultures, and the NHS Discography, which contains field recordings of performances of dance, healing, love, and lullaby. Using these two corpora, the study tests a variety of hypotheses about the universality and variability of both music behavior and music form. Specifically, whether there are meaningful universals in meaning and sound. The catalog of published sound recordings was analyzed by machine summaries, listener ratings, and manual transcriptions, which revealed that there were identifiable features of songs which could then predict their primary function cross-culturally. The results as a whole revealed that the existence of music is a cultural universal, and that the variation within music can be characterized by three factors assessing the formality, arousal, and religiosity of the song events. They also found that musical behavior varies more within societies than between them.

This study explores the prevalence of group singing and its relationship with changes in social organization's participatory dynamics, precisely community size and social differentiation. The authors use two samples: 1) 5776 audio recordings from 1024 societies and 2) 4709 ethnographic texts from 60 societies. There is significant support that group singing is more prevalent than solo singing. The results also show that community size predicts group singing in only one of the samples (GJB). However, there is no significant support for social differentiation as a predictor of group singing.

The present research investigates the theory of universality in form and function in human song in a sample of people from 60 countries listening to music from 86 mainly small-scale societies. The aims are to document whether people 1) identify the social function of a song solely on form, 2) demonstrate form-function inferences, 3) use contextual aspects to distinguish song functions, and 4) use musical features to differentiate song functions. The authors claim support for the universal perception of song form-function in music listeners.

The authors develop CantoCore, an expansion of Lomax's Cantometrics scheme, in order to code for additional candidate musical universals. No musical feature occurs with absolute universality, but several features occur with statistically significant frequency after controlling for historical relatedness, and an additional set of features were found to be universally related to each other. The authors highlight the role of these features in human coordination and cohesion, as well as their their utility to the fields of musical cognition and evolution.

In this study, the author empirically tests a formulation of Ellen Dissanayake's evolutionary theory of art, which argues that art evolved to promote group cohesion. The hypotheses derived from this theory and tested in this study specifically focus on ritual art and its relationships to various proxies for group cohesion such as community conflict and internal warfare. Results show that the presence of ritual art is significantly higher where certain measures of group cohesion are also higher (including lower internal warfare, lower conflict between communities of the same society, and lower frequency of violent conflict between groups within local communities).

The authors examine musical diversity in India using cantometric data from 32 Indian societies with the goal of better understanding how music varies between and within cultures. They find very minor musical differences between language families, greater diversity between societies but within language families, and the most variation within societies.