Collaborative design (co-design) is a team effort fostered through the creative involvement of all participants in co-creative collaboration (co-creation). This new approach to design as a creative social activity heightens the need to study the interpersonal aspects of creativity. Though co-creation has become widely used in recent years, few studies focus on its dynamics, which emerge from intense interactions created by the shared subjectivities of participants in an intersubjective environment. The management and enhancement of interpersonal factors can help create this shared environment by leading the process from personal to interpersonal creativity. Some of these interpersonal factors could be measured by observing the data of biosignals that are used as social cues, particularly if studied in comparison with the data of one of the partners of the social interaction, thanks to the synchrony rate between these datasets. This synchrony of biosignals related to shared behaviours can be associated with the interactive level dynamics that occur during co-creation in team of two (pairwork). This study presents the results of an experiment where biosignal synchrony results were compared to subjective feedback regarding the interactive level to understand the dynamics of the interaction. The results suggest the possibility of using the synchrony rate measured by the Damerau- Levenshtein distance (Ld) or dynamic time warping method (DTW) to approximate the dynamics of the interactive level in co-creative pairwork. This study will contribute to our understanding of the influence of the socio-cognitive process on interactions during co-creation to improve the co-creative design process.