This article suggests that Wilson's definition of sociobiology, which incorporates underlying principles of animal social behavior, can be applied to human bahvior. Specifically, Wilson's assertion that the major ecological conditions associated with monogamy in animal societies, is tested on human societies.

This study attempts to replicate earlier findings regarding transvestism using a larger sample and a different index of sex distinctions. It is asserted that societies that maximize sex distinctions will not have institutionalized male transvestism.

Munroe and Fought attempt to add new perspective to Ember and Ember's (2007) assertion that certain environmental features help to predict mean sonority levels in speech. This article discusses the other possible elements such as word length that might raise the level of communicative efficiency.

This study examines possible correlates of the couvade. Results suggest that matri-residence, mother-infant sleeping arrangements, and low male salience all are associated with the couvade.

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 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).

Using a sample of four language families, this paper replicates previous findings on the relationship between consonant-vowel syllable use and climate. An secondary finding on the relationship between consonant-vowel syllable use and writing system was also replicated.

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 article examines institutionalized male transvestism and the couvade, finding that they are mutually exclusive in a cross-cultural sample. Possible explanations for the negative association between male transvestism and the couvade (e.g. sex-identity differentiation and confusion) are discussed.

This study examines the theory that transvestism is a way for boys to escape the male role. Munroe and Munroe use male contribution to subsistence as a new measure of a "rigorous male role." Findings suggest an association between male predominance in subsistence and presence of transvestism.