We study the correlation between phylogenetic and geographic distances for the languages of the Andic branch of the East Caucasian (Nakh-Daghestanian) language family. For several alternative phylogenies, we find that geographic distances correlate with linguistic divergence. Notably, qualitative classifications show a better fit with geography than cognacy-based phylogenies. We interpret this result as follows: The better fit may be due to implicit geographic bias in qualitative classifications. We conclude that approaches to classification other than those based on cognacy run a risk to implicitly include geography and geography-related factors as one basis of genealogical classifications.

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Recent empirical studies have highlighted the large degree of analytic flexibility in data analysis that can lead to substantially different conclusions based on the same data set. Thus, researchers have expressed their concerns that these researcher degrees of freedom might facilitate bias and can lead to claims that do not stand the test of time. Even greater flexibility is to be expected in fields in which the primary data lend themselves to a variety of possible operationalizations. The multidimensional, temporally extended nature of speech constitutes an ideal testing ground for assessing the variability in analytic approaches, which derives not only from aspects of statistical modeling but also from decisions regarding the quantification of the measured behavior. In this study, we gave the same speech-production data set to 46 teams of researchers and asked them to answer the same research question, resulting in substantial variability in reported effect sizes and their interpretation. Using Bayesian meta-analytic tools, we further found little to no evidence that the observed variability can be explained by analysts’ prior beliefs, expertise, or the perceived quality of their analyses. In light of this idiosyncratic variability, we recommend that researchers more transparently share details of their analysis, strengthen the link between theoretical construct and quantitative system, and calibrate their (un)certainty in their conclusions.

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Glottalized sonorants are a rare sound type that has been under scrutiny for a number of reasons of general relevance to the phonetic theory. It has been claimed that the timing of glottalization of glottalized sonorants may shift in accordance with the position in the syllable onset (pre-glottalization) or coda (post-glottalization), to provide a cue for its place of articulation; other studies argued against this claim. The paper investigates acoustic properties of the glottalized lateral in Rikvani Andi, a one-village dialect of Andi (East Caucasian). Based on the data from elicitations and free narratives, we consider the acoustic correlates that have been argued in the literature to differentiate glottalized sonorants from their modal counterparts, including aperiodicity, intensity, duration and spectral tilt. In Rikvani Andi, all of the correlates prove to be statistically significant in recordings of isolated words, but the differences tend to decrease in free narratives. The timing of glottalization does not support the existing generalizations – while the glottalized lateral only occurs in Rikvani Andi in the syllable onset, it tends to be mid- to post-glottalized. We discuss two possible explanations of why the Rikvani Andi glottalized sonorant fails to comply with typological expectations.