The proposed project aims to build upon the promising findings of prior work within the BOF project from Jolien Braet by exploring the nuanced roles of various interoception dimensions in shaping psychophysiological stress responses in adolescents. While previous research has highlighted the importance of interoceptive accuracy, sensibility, and awareness in stress reactivity and recovery, this project seeks to delve deeper into these dimensions, potentially offering novel insights into their complex interactions and implications for emotional regulation and stress resilience. In this project, data will be used from a cohort of adolescents who underwent a series of assessments to measure interoceptive accuracy, sensibility, and awareness using an adapted heartbeat counting task. Following this, participants were subjected to a standardized stress-induction protocol, during which physiological responses (such as respiratory sinus arrhythmia, RSA) and self-reported emotional states were recorded. The central hypothesis posits that higher interoception will be associated with more adaptive stress responses, characterized by less pronounced negative affect during stress induction and a more efficient recovery phase. Conversely, it is expected that distinct patterns of RSA reactivity and recovery will emerge based on varying levels of interoceptive accuracy, sensibility, and awareness. By leveraging advanced multilevel modeling techniques, this project aims to disentangle the differential impacts of each interoception dimension on stress-related physiological and emotional outcomes. The findings are anticipated to extend the current understanding of interoception in adolescence, highlighting its potential role in fostering resilience to stress. Additionally, this project will lay the groundwork for future postdoctoral research, focusing on interoception using alternative paradigms to further elucidate its underlying mechanisms and broader implications. Overall, this study strives to contribute valuable knowledge to the field of adolescent psychophysiology, potentially informing targeted interventions aimed at enhancing interoceptive skills to improve stress management and emotional well-being during this critical developmental period.