Non-native tones are considered challenging for adult second language speakers to perceive and produce. The current study examined the effect of a laboratory-based intensive training in improving American English speakers’ tone production. Participants’ task was to repeat Mandarin words after the model. There were two conditions in the experiment: in one condition, participants did not get any external feedback; whereas in the other condition, participants received detailed visual feedback, which was the pitch contour of their tone production alongside the native version. Eight participants completed training with no feedback and another eight participants were trained with visual feedback. Results revealed that participants in both groups did not improve their tone production after training, and participants trained with visual feedback did not show more improvement than those trained with no feedback. Given the lack of improvement in participants’ tone production after training, methodological and theoretical limitations with respect to the use of a repetition-based training paradigm are discussed.

Extended Reality (XR) technologies, including virtual reality (VR), mixed reality (MR) and augmented reality (AR), are increasingly being integrated into production training across various industries. As XR becomes more prevalent, ethical considerations surrounding its implementation become important. This research aims to explore the ethical dimensions of XR in production training, with a specific purpose of identifying potential ethical issues that may arise with the use of XR in production training.. The study then proposes a guiding framework that encompasses pre-adoption, adoption, and usage stages of XR implementation, addressing key ethical concerns and offering practical guidelines for organisations, particularly small and medium-sized enterprises (SMEs), in the manufacturing industry.  The research methodology involves a systematic review of existing literature on XR development, the need for production training and the ethics of XR. It also incorporates qualitative interviews with industry experts and practitioners to gather insights on the challenges and opportunities related to ethical XR implementation. The findings highlight the importance of appointing a champion for XR use cases, conducting risk assessments, establishing clear guidelines and policies, training trainers on ethical considerations, selecting appropriate XR devices, designing simulations with user experience in mind, obtaining informed consent, and monitoring employee well-being.  The implications of this research extend beyond manufacturing industry SMEs, as the proposed framework can be applied to other businesses utilising XR for training purposes. By integrating ethical considerations and promoting user involvement in XR implementation, organisations can unlock the full potential of XR technologies while ensuring inclusivity, equal opportunities, and ethical practices. This research contributes to the growing body of knowledge on XR ethics and offers practical guidance for practitioners and decision-makers in leveraging XR for production training in an ethical and inclusive manner.