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The purpose of this study is to investigate communication on Twitter during two unpredicted crises (the Manchester bombings and the Munich shooting) and one natural disaster (Hurricane Harvey). The study contributes to understanding the dynamics of convergence behaviour archetypes during crises.

The authors collected Twitter data and analysed approximately 7.5 million relevant cases. The communication was examined using social network analysis techniques and manual content analysis to identify convergence behaviour archetypes (CBAs). The dynamics and development of CBAs over time in crisis communication were also investigated.

The results revealed the dynamics of influential CBAs emerging in specific stages of a crisis situation. The authors derived a conceptual visualisation of convergence behaviour in social media crisis communication and introduced the terms hidden and visible network-layer to further understanding of the complexity of crisis communication.

The results emphasise the importance of well-prepared emergency management agencies and support the following recommendations: (1) continuous and (2) transparent communication during the crisis event as well as (3) informing the public about central information distributors from the start of the crisis are vital.

The study uncovered the dynamics of crisis-affected behaviour on social media during three cases. It provides a novel perspective that broadens our understanding of complex crisis communication on social media and contributes to existing knowledge of the complexity of crisis communication as well as convergence behaviour.

This research introduces and validates psychological ownership of health as a novel theoretical construct characterized by individuals’ perceived possessiveness, attachment and responsibility toward their health. This study aims to examine the construct’s ability to predict and explain consumers’ health-related decision-making for themselves and others.

Two online surveys with US participants (N = 680) were conducted. The psychological ownership of health scale was first validated through confirmatory factor analysis. Next, the influence of psychological ownership of health on positive health behaviors and blood donation intentions was assessed using multiple regression analyses and conditional process modeling.

Psychological ownership of health demonstrated significant positive associations with health-promoting behaviors (dietary choices, physical activity, sleep hygiene) mediated by health self-efficacy. In addition, psychological ownership of health predicted increased blood donation intentions, and this relationship is amplified among individuals high in cultural collectivism.

The findings suggest that interventions fostering psychological ownership of health may simultaneously promote personal health maintenance and prosocial health behaviors. These dual implications offer promising applications for individualized and public health initiatives.

This research advances psychological ownership theory by establishing and validating a health-specific dimension that predicts critical health behaviors at individual and societal levels. By identifying cultural collectivism as a moderator, this research also integrates psychological ownership theory with cultural dimensions theory, revealing cultural variability in health ownership’s influence on prosocial health outcomes.

This study examines the relationship between the writing anxiety experienced by English second language learners and their intention to employ ChatGPT for their academic writing as an automated writing evaluation tool. This research integrates writing anxiety as an additional variable to understand how much writing anxiety affects the perceived usefulness of ChatGPT as an automated writing evaluation tool, perceived ease of use of ChatGPT, and attitude towards using ChatGPT as an automated writing evaluation tool for their academic writing with the technology acceptance model (TAM) as a theoretical framework.

This is a cross-sectional study, with SEM PLS to analysis data collected from 639 undergraduate students.

This study found that writing anxiety significantly affects perceived ease of use of ChatGPT as an automated writing evaluation tool, and attitude towards using ChatGPT. Altogether they both influence students’ intention to use the ChatGPT as an automated writing evaluation tool.

This study contributes to the understanding of students intention to use ChatGPT as an automated writing evaluation tool when they suffer from writing anxiety.