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This study aims to investigate the relationships of narrative role, empathy, host identification, spatial distance, and purchase intention. This study conducts three experiments with 460 participants to analyze the influencing mechanism of narrative role (in-group vs. out-group) on consumers' purchase intentions from the perspective of empathy and host identification through three experiments in different spatial distances (distant vs. close). (a) The study found that in the context of agricultural product live stream, hosts taking an in-group character are more likely to trigger consumers' purchase intentions than hosts taking an out-group character. (b) Empathy and host identification play a mediating role in the impact of the narrative role on consumers' purchase intentions. (c) The impact of the host's narrative role on purchase intention does not significantly differ in a spatially distant location. Compared to the host as an out-group character, the host as an in-group character is more likely to promote consumers' purchase intention when the spatial distance is close.

AbstractChina faces increasing health risks from climate change. The structure and function of the eye and vision were affected by extreme heat and cold. The study aimed to evaluate the impacts of heatwaves and cold spells on glaucoma. A national cross-sectional study of the Rural Epidemiology for Glaucoma (REG-China) was conducted in ten provinces of China, and 36,081 adults aged 40 years or more were included. Glaucoma signs were assessed via a standard examination. A total of 15 heatwave definitions, based on intensity (95th to 99th percentiles of temperature distribution) and duration (≥2 days, 3 days, and 4 days), were used to quantify heatwave effects, and 6 cold spell definitions were defined based on threshold temperature percentile (5th and 10th) and duration (3 days, 5 days, and 9 days). Multivariable-adjusted logistic regression models paired with interaction analysis were performed to investigate the impacts of heatwaves and cold spells on glaucoma, and the dose-response relationships were assessed using a restricted cubic spline (RCS) model. Subgroup analysis was conducted stratified by gender, age, smoking status, occupation, and family history of glaucoma. The overall prevalence of glaucoma was 2.1% (95% CI 1.94–2.25%). Higher heatwaves were significantly correlated with higher OR of glaucoma, with the OR (95% CI) ranging from 1.014 (1.009, 1.018) to 1.090 (1.065, 1.115) by different definitions. Glaucoma was affected by heatwaves more strongly than by cold spells. The effects of both heatwaves and cold spells were higher in males than females and in smokers than nonsmokers. These results of the present study evoked the attention of prospective research to elucidate the relationship between extreme temperatures and eye diseases.