This OSF project describes the Interdependence in Daily Life (IDL) study. **Publications using data from the IDL study** Rentzsch, K., Columbus, S., Balliet, D., & Gerlach, T. M. (2022). Similarity in situation perception predicts relationship satisfaction. *Personality Science, 3*, e8007. https://doi.org/10.5964/ps.8007 Columbus, S.,* Molho, C.,* Righetti, F., & Balliet, D. (2021). Interdependence and cooperation in daily life. *Journal of Personality and Social Psychology, 120*(3), 626–650. https://doi.org/10.1037/pspi0000253 Peperkoorn, L. S., Becker, D. V., Balliet, D., Columbus, S., Molho, C., & van Lange, P. A. M. (2020). The prevalence of dyads in social life. *PLOS one, 15*(12), e0244188. https://doi.org/10.1371/journal.pone.0244188 Righetti, F., Balliet, D., Molho, C., Columbus, S., Faure, R., Bahar, Y., Iqmal, M., Semenchenko, A., & Arriaga, X. (2020). Fostering attachment security: The role of interdependent situations. *International Journal of Environmental Research and Public Health, 17*(20), 7648. https://doi.org/10.3390/ijerph17207648 Columbus, S., Thielmann, I., & Balliet, D. (2019). Situational affordances for prosocial behaviour: On the interaction between Honesty-Humility and (perceived) interdependence. *European Journal of Personality, 33*(6), 655–673. https://doi.org/10.1002%2Fper.2224