Considering the effects of public urban spaces on social interaction and participation, this study aimed to provide guidelines for designing public urban spaces to enhance social interaction and trust in urban spaces. In this research, a quantitative-qualitative research method is applied. Furthermore, the Delphi method was utilized for data collection to construct a content table and questionnaires. Randomized cluster sampling was implemented. The data underwent evaluation using SPSS, employing R factor analysis to generate an analytical model in Amos. The research findings suggest that physical attributes of the space, encompassing sociability, spatial diversity, flexibility, physical comfort, social trust and interaction, pedestrian accessibility, ease of navigation, and psychological comfort, significantly influence alterations in social interaction and trust within public urban spaces. The results demonstrate that social, physical, design, and psychological environmental characteristics in urban spaces establish the requisite conditions for enhancing socialization and pedestrian access, thereby fostering trust and social participation
