This article adds nuanced findings to the previous generalization that high sonority of the vowel explains its more frequent use in warmer climates. The authors find that “speakers in warm-climate languages make more use of the so-called “sonorant” consonants, that is, consonants with some of the qualities of vowels” (123).

This study examines whether language construction, specifically the number of consonant-vowel syllables, will be related to the environment and literacy of a society. Empirical analysis suggests that consonant-vowel syllables are more common in warmer climates and less common in written languages.

This article is a response to Munroe, Fought, and Fought's comments on a previous study of sonority and climate. Authors suggest that the three indices used by Munroe, Fought, and Fought to measure sonority are not the same contruct and present new results that indicate an association between climate, topography, and vowel index.

In this paper, the authors argue against the findings presented in Hay & Bauer (2007) which suggest a positive correlation between population size and phoneme inventory size in languages. In order to do so, they highlight some methodological issues in the previous study, as well as other studies addressing similar questions. To address these issues, the authors conducted their own study using a larger and more representative sample of phoneme inventories drawn from the PHOIBLE knowledge base, and applied a more rigorous statistical analysis using a hierarchical mixed model. The results indicate that correlations between population size and phoneme inventory size are quite small when compared to differences among language family groups, and that the phoneme-population relationship fluctuates around zero between families, suggesting that any relationship between population and phoneme inventory size does not generalize to language as a whole. The author concludes that the correlations seen between population and phoneme inventories are likely to be artifacts, and do not find compelling reason to consider population size as a potential causal factor in the development of phonological systems.

This article presents a reanalysis of a previous study on language rhythm and consonant-vowel syllables by Ember and Ember (2000). Communicative efficiency, climate, baby-holding, literacy, and mean number of syllables per word were all considered as factors in consonant-vowel syllable use.

This study tests predictors of consonant-vowel prevalence cross-culturally. Authors reevaluate the findings of Munroe et. al. (1996) and also test a new variable—baby-holding—for its relationship to CV score. Results suggest that baby-holding is a significant predictor of CV score.

The authors investigate the relationship between linguistic diversity and various environmental and spatial variables associated with biodiversity. Most of these variables predict linguistic diversity variably across different continents, and more so within Africa and extended Asia (Asia, the Pacific, and Australia) than within Europe and the Americas. This divide is theorized to be a result of differences in demography and impact of colonialism between the two global regions. However, two environmental factors, landscape roughness and density of river systems, are found to be significant predictors across all global regions. The authors suggest that, as in processes of speciation, rough terrain and watercourses both create physical barriers between which languages can develop in isolation while, in the case of river junctions, also providing transportation routes whereby hybrid languages can occasionally manifest.

This article focuses on environmental and social explainations for variations in sonority. As expected, results suggest that climate, vegetation density, and sexuality are associated with sonority.

This study found that the more language speakers there are, the more phonemes in the language. In addition, the more language speakers, the more vowels and consonants. While some language families have more phonemes than others, this did not affect the results. The goal of this paper was only to illustrate a link between the two and the authors hope this work encourages further examination into this relationship.

This article examines the universal tendency for languages, regardless of their historical relationships, to develop similar words for mother and father on the basis of nursery forms. Findings suggest that Ma, Na, Pa, and Ta are significantly more common sound classes denoting the mother or father.