Though this research is anchored within the field of Linguistics, it constitutes an interdisciplinary approach aiming to establish a dialogue between Multimodal Interaction Analysis and Phenomenology. This research examines the complex notion of identity by defining it as a verbal, technical, and intersubjective phenomenon. The bodily, sensory, relational and social human existence is henceforth engaged in digital interaction devices inducing unprecedented modalities of intersubjectivity. Therefore, in this manuscript, I propose to analyze the novel features of intersubjectivity involved in digital interactions.

In the first part of this dissertation, the theoretical exploration, I seek to apprehend the nature of identity co-construction, the stakes of interindividual encounter understood as an intersubjective phenomenon, and the spatio-temporal characteristics of digital interactions. Firstly, through a phenomenological approach, I define the encounter as a meaningful event and I explore the phenomenotechnical properties of digital intersubjectivity. Secondly, through an interactionist approach, I focus on language and its role in identity co-construction, and more specifically on sequential organization and embodied practices within hybrid interactions.

Thereafter, in the second part of this dissertation, those novel theorizations are submitted to the test of a second data analysis. This empirical exploration consists in studying online encounters between geographically distant participants. This study allows me to draw a topography of the spatio-temporal framework of hybrid interaction, a typology of the acts of enacting existence on screen and a description of the ontological process of identity co-construction.