Nullius in Verba
Nullius in Verba is a podcast about science—what it is and what it could be. It is hosted by Smriti Mehta from UC Berkeley and Daniël Lakens from Eindhoven University of Technology. We draw inspiration from the book Novum Organum, written in 1620 by Francis Bacon, which laid the foundations of the modern scientific method. Our logo is an homage to the title page of Novum Organum, which depicts a galleon passing between the mythical Pillars of Hercules on either side of the Strait of Gibraltar, which have been smashed by Iberian sailors to open a new world for exploration. Just as this marks the exit from the well-charted waters of the Mediterranean into the Atlantic Ocean, Bacon hoped that empirical investigation will similarly smash the old scientific ideas and lead to a greater understanding of the natural world. The title of the podcast comes from the motto of the Royal Society, set in typeface Kepler by Robert Slimbach. Our theme song is Newton’s Cradle by Grandbrothers.
Episodes

Friday Mar 08, 2024
Episode 29: Theoria Aedificans - Pars I
Friday Mar 08, 2024
Friday Mar 08, 2024
In this episode we discussed the 8-step method of theory building proposed by Robin Dubin in his classic 1969 book Theory Building.
Shownotes
Dubin, R. (1969). Theory building. Free Press. http://catalog.hathitrust.org/api/volumes/oclc/160506.html
Lynham, S. A. (2002). Quantitative Research and Theory Building: Dubin’s Method. Advances in Developing Human Resources, 4(3), 242–276. https://doi.org/10.1177/15222302004003003
Elms, A. C. (1975). The crisis of confidence in social psychology. American Psychologist, 30(10), 967.
Meehl, P. E. (1978). Theoretical Risks and Tabular Asterisks: Sir Karl, Sir Ronald, and the Slow Progress of Soft Psychology. Journal of Consulting and Clinical Psychology, 46(4), 806–834. https://doi.org/10.1037/0022-006X.46.4.806
Swedberg, R. (2014). The art of social theory. Princeton University Press.
Ben Wright: https://en.wikipedia.org/wiki/Benjamin_Drake_Wright
Yarkoni, T., & Westfall, J. (2017). Choosing Prediction Over Explanation in Psychology: Lessons From Machine Learning. Perspectives on Psychological Science, 12(6), 1100–1122. https://doi.org/10.1177/1745691617693393
Isaac, M. G., Koch, S., & Nefdt, R. (2022). Conceptual engineering: A road map to practice. Philosophy Compass, 17(10), e12879. https://doi.org/10.1111/phc3.12879

Friday Feb 23, 2024
Episode 28: Scientia Cumulativa
Friday Feb 23, 2024
Friday Feb 23, 2024
In this episode, we discuss the barriers to cumulative science, including inconsistent measurement tools, overreliance on single studies, and the large volume of research publications. Can replications, interdisciplinary collaborations, and prospective meta-analyses help us solve this issue? Can AI solve all our problems? And do most scientists treat their theories like toothbrushes?
Shownotes
Opening quote by George Sarton
Sarton, G. (1927). Introduction to the History of Science (Vol. 376).
Is Science Cumulative? a Physicist Viewpoint: https://link.springer.com/chapter/10.1007/978-1-4020-6279-7_10
Psychological Methods. (2009). Special Issue: Multi-Study Methods for Building a Cumulative Psychological Science.
Walter Mischel, Becoming a Cumulative Science
Dorothy Bishop - Why we need cumulative science (AIMOS)
Watkins, J. W. (1984). Science and Skepticism. Princeton University Press.

Friday Feb 16, 2024
Prologus 28: Chaos in the Brickyard (B. K. Forscher)
Friday Feb 16, 2024
Friday Feb 16, 2024
A reading of:
Forscher, B. K. (1963). Chaos in the Brickyard. Science, 142(3590), 339–339. https://doi.org/10.1126/science.142.3590.339

Friday Feb 09, 2024
Episode 27: Vocans Ictus Tuos - Pars II
Friday Feb 09, 2024
Friday Feb 09, 2024
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

Friday Jan 26, 2024
Episode 26: Vocans Ictus Tuos - Pars I
Friday Jan 26, 2024
Friday Jan 26, 2024
In this two part episode we discuss the fine art of preregistration. We go back into the history of preregistration, its evolution, and current use. Do we preregister to control the Type 1 error rate, or to show that we derived our prediction from theory a priori? Can and should we preregister exploratory or secondary data analysis? And how severe is the issue of severe testing?
Shownotes
ClinicalTrials.gov
You can preregister on AsPredicted and the OSF
Johnson, M. (1975). Models of Control and Control of Bias. European Journal of Parapsychology, 36–44.
SPIRIT Checklist
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, 1(3), 432–438. https://doi.org/10.1177/2515245918776632
FDA trials 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
van den Akker, O. R., van Assen, M. A. L. M., Enting, M., de Jonge, M., Ong, H. H., Rüffer, F., Schoenmakers, M., Stoevenbelt, A. H., Wicherts, J. M., & Bakker, M. (2023). Selective Hypothesis Reporting in Psychology: Comparing Preregistrations and Corresponding Publications. Advances in Methods and Practices in Psychological Science, 6(3), 25152459231187988. https://doi.org/10.1177/25152459231187988
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
Bakan, D. (1966). The test of significance in psychological research. Psychological Bulletin, 66(6), 423–437. https://doi.org/10.1037/h0020412
Rosenthal, R. (1966). Experimenter effects in behavioral research. Appleton-Century-Crofts.
Johnson, M. (1975). Models of Control and Control of Bias. European Journal of Parapsychology, 36–44.
de Groot, A. D. (1969). Methodology. Mouton & Co.
Claesen, A., Lakens, D., Vanpaemel, W., & Dongen, N. van. (2022). Severity and Crises in Science: Are We Getting It Right When We’re Right and Wrong When We’re Wrong? PsyArXiv. https://doi.org/10.31234/osf.io/ekhc8

Friday Jan 12, 2024
Episode 25: Reverentia Ad Auctoritatem
Friday Jan 12, 2024
Friday Jan 12, 2024
In the first episode of 2024, we discuss the double-edged sword: reverence to authority. Should scientists respect others on whose shoulders they stand? Or should they be wary of appeal to authority? How should scientists deal with other sources of authority in science, like for example, the government or academic societies? And how can we differentiate true expertise from mere authority? Enjoy.
Shownotes
Frank, P. (1956). The role of authority in the interpretation of science. Synthese, 10, 335–338.
Barber, B. (1952). Science and the social order. Glencoe, Ill. : Free Press. http://archive.org/details/sciencesocialord0000barb
Barber, B. (1961). Resistance by Scientists to Scientific Discovery. Science, 134(3479), 596–602.
Kitcher, P. (1992). Authority, deference, and the role of individual reasoning in science. In E. Mcmullin (Ed.), The social dimensions of science. Notre Dame: The University of Notre Dame Press
Polanyi, M. (1962). The republic of science. Minerva, 1(1), 54–73
The practice of two-spaces after the end of a sentence comes from when type-writers used monospaced typefaces: https://slate.com/technology/2011/01/two-spaces-after-a-period-why-you-should-never-ever-do-it.html

Friday Jan 05, 2024
Prologus 25: The Fixation of Belief (C. S. Peirce)
Friday Jan 05, 2024
Friday Jan 05, 2024
The Fixation of Belief. Charles S. Peirce. Popular Science Monthly 12 (November 1877), 1-15.
http://peirce.org/writings/p107.html

Friday Dec 29, 2023
Episode 24: Contra Creativitatem Epistolae - Pars II
Friday Dec 29, 2023
Friday Dec 29, 2023
In this second installment of The Anticreativity Letters, we continue discussing the Tempter's tactics for stifling creativity and how to overcome them.

Friday Dec 15, 2023
Episode 23: Contra Creativitatem Epistolae - Pars I
Friday Dec 15, 2023
Friday Dec 15, 2023
In the first of a two-part episode, we discuss The Anticreativity Letters by Richard Nisbett, in which a senior "tempter" advises a junior tempter on ways to prevent a young psychologist from being a productive and creative scientist.
Nisbett, R. E. (1990). The anticreativity letters: Advice from a senior tempter to a junior tempter. American Psychologist, 45(9), 1078–1082.
BMJ Christmas issue: https://www.bmj.com/about-bmj/resources-authors/article-types/christmas-issue
Quote by Ira Glass: https://www.goodreads.com/quotes/309485-nobody-tells-this-to-people-who-are-beginners-i-wish

Friday Dec 08, 2023
Prologus 23: The Anticreativity Letters (R. E. Nisbett)
Friday Dec 08, 2023
Friday Dec 08, 2023
A reading of:
Nisbett, R. E. (1990). The anticreativity letters: Advice from a senior tempter to a junior tempter. American Psychologist, 45(9), 1078–1082. https://doi.org/10.1037/0003-066X.45.9.1078