In today’s episode, we continue our conversation about preregistration. How flexible can we be when we preregister, without increasing flexibility in our analysis? How well do people preregister, and what does a good preregistration look like? And how do we deal with deviations from preregistrations?   Shownotes   Dubin, R. (1969). Theory building. Free Press. His full quote is: "There is no more devastating commendation that the self-designated theorist makes of the researcher than to label his work purely descriptive".  Claesen, A., Gomes, S., Tuerlinckx, F., & Vanpaemel, W. (2021). Comparing dream to reality: An assessment of adherence of the first generation of preregistered studies. Royal Society Open Science, 8(10), 211037. https://doi.org/10.1098/rsos.211037 Akker, O. van den, Bakker, M., Assen, M. A. L. M. van, Pennington, C. R., Verweij, L., Elsherif, M., Claesen, A., Gaillard, S. D. M., Yeung, S. K., Frankenberger, J.-L., Krautter, K., Cockcroft, J. P., Kreuer, K. S., Evans, T. R., Heppel, F., Schoch, S. F., Korbmacher, M., Yamada, Y., Albayrak-Aydemir, N., … Wicherts, J. (2023). The effectiveness of preregistration in psychology: Assessing preregistration strictness and preregistration-study consistency. MetaArXiv. https://doi.org/10.31222/osf.io/h8xjw Sequential analysis and alpha spending functions https://lakens.github.io/statistical_inferences/10-sequential.html  Bishop, D. V. M. (2018). Fallibility in Science: Responding to Errors in the Work of Oneself and Others. Advances in Methods and Practices in Psychological Science, 2515245918776632. https://doi.org/10.1177/2515245918776632 FDAAA Trial Tracker https://fdaaa.trialstracker.net  Ensinck, E., & Lakens, D. (2023). An Inception Cohort Study Quantifying How Many Registered Studies are Published. PsyArXiv. https://doi.org/10.31234/osf.io/5hkjz Quantitude episode on preregistration https://quantitudepod.org/s3e07-in-defense-of-researcher-degrees-of-freedom/  Lakens, D. (2023). When and How to Deviate from a Preregistration. PsyArXiv. https://doi.org/10.31234/osf.io/ha29k