Multiple outlets report on a study examining how people pronounce everyday words such as “happy,” “baby,” “chilly,” and “city.” The articles say the researchers find patterns in pronunciation that vary by social class, suggesting that the way certain vowels are pronounced can correlate with different socioeconomic groups. According to the coverage, the study looks at speech sounds that differ across accents and then compares these differences with measures of social class. The outlets present the findings as an indicator that pronunciation choices may reflect broader social factors, rather than being random or only regional. While the reports highlight the specific words people are asked to pronounce, they do not provide additional methodological detail or direct estimates in the supplied text. Overall, the articles present the same core claim: pronunciation of particular common words can serve as a clue to a person’s social class, based on results from the referenced research.