Visibility and availability of single cigarettes around schools in four Latin American countries.

INTRODUCTION: Single cigarette sales at tobacco-selling points of sale (POS) may promote smoking. We explored visibility and availability of single cigarettes in POS around schools in Argentina, Guatemala, Mexico and Peru, countries where their sale is banned. METHODS: Between April and July 2023, an observational study was conducted at POS around high schools in urban and rural areas in Argentina, Guatemala, Mexico and Peru. A sampling frame of schools was generated from public registries, with schools categorised according to their socioeconomic status and randomly selected within socioeconomic strata. A total of 2081 POS were surveyed based on their proximity to these randomly selected schools. Data were collected on the visibility of single cigarettes (any cigarette sticks or open cigarette packs on display and able to be seen by customers were coded as visible) and their availability (ie, whether singles were sold, whether visible or not). RESULTS: Single cigarettes were visible in 37.2% of POS and available in most (84.9%), with neighbourhood stores the primary source. In most (84.1%) POS with visible single cigarettes, they were displayed near candy or toys. Prices of the cheapest single cigarette sticks ranged from US$0.03 in Argentina to US$0.13 in Guatemala. CONCLUSION: The findings indicate widespread availability of single cigarettes in four Latin American countries where their sale is banned. The low price of single cigarettes, and their proximity to candy/toys, may increase the appeal of smoking to youth. Stricter enforcement of bans on single cigarettes, which may serve as a gateway to experimentation and continued smoking, is needed.

Development of phonological constancy: toddlers' perception of native- and Jamaican-accented words.

Efficient word recognition depends on detecting critical phonetic differences among similar-sounding words, or sensitivity to phonological distinctiveness, an ability evident at 19 months of age but unreliable at 14 to 15 months of age. However, little is known about phonological constancy, the equally crucial ability to recognize a word's identity across natural phonetic variations, such as those in cross-dialect pronunciation differences. We show that 15- and 19-month-old children recognize familiar words spoken in their native dialect, but that only the older children recognize familiar words in a dissimilar nonnative dialect, providing evidence for emergence of phonological constancy by 19 months. These results are compatible with a perceptual-attunement account of developmental change in early word recognition, but not with statistical-learning or phonological accounts. Thus, the complementary skills of phonological constancy and distinctiveness both appear at around 19 months of age, together providing the child with a fundamental insight that permits rapid vocabulary growth and later reading acquisition.