

Nullius in Verba
Smriti Mehta and Daniël Lakens
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. 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. 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
Mentioned books

9 snips
Jul 27, 2024 • 1h 13min
Episode 39: Activismus
In this episode, we discuss activism in science. How do political and personal values affect science? When is activism just part of the job? And should one be careful about activism in the classroom? Enjoy.
Shownotes:
Frisby, C. L., Redding, R. E., & O’Donohue, W. T. (2023). Ideological and Political Bias in Psychology: An Introduction. In Ideological and Political Bias in Psychology: Nature, Scope, and Solutions (pp. 1-14). Cham: Springer International Publishing.
McCaughey, M. (2023). The Trouble with Scholar-Activists. AAUP.
McCaughey, M. (2024). Against Scholar Activists. The James G. Martin Center for Academic Renewal.
Honeycutt, N., & Jussim, L. (2023). Political bias in the social sciences: A critical, theoretical, and empirical review. Ideological and Political Bias in Psychology: Nature, Scope, and Solutions, 97-146.
Sargent, R. M. (2012). From Bacon to Banks: The vision and the realities of pursuing science for the common good. Studies in History and Philosophy of Science Part A, 43(1), 82-90.
Weber, M. (1946). Science as a Vocation. In Science and the Quest for Reality (pp. 382-394). London: Palgrave Macmillan UK.

28 snips
Jul 12, 2024 • 55min
Episode 38 - Replicatio - II
In this episode, we continue our discussion of replications. We talk about how to analyze replication studies, which studies are worth replicating, and what is the status of replications in other scientific disciplines.
Shownotes
Mack, R. W. (1951). The Need for Replication Research in Sociology. American Sociological Review, 16(1), 93–94. https://doi.org/10.2307/2087978
Smith, N. C. (1970). Replication studies: A neglected aspect of psychological research. American Psychologist, 25(10), 970–975. https://doi.org/10.1037/h0029774
Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology (New edition). Cambridge Center for Behavioral.
Ebersole, C. R., Mathur, M. B., Baranski, E., Bart-Plange, D.-J., Buttrick, N. R., Chartier, C. R., Corker, K. S., Corley, M., Hartshorne, J. K., IJzerman, H., Lazarević, L. B., Rabagliati, H., Ropovik, I., Aczel, B., Aeschbach, L. F., Andrighetto, L., Arnal, J. D., Arrow, H., Babincak, P., … Nosek, B. A. (2020). Many Labs 5: Testing Pre-Data-Collection Peer Review as an Intervention to Increase Replicability. Advances in Methods and Practices in Psychological Science. https://doi.org/10.1177/2515245920958687
Isager, P. M., van Aert, R. C. M., Bahník, Š., Brandt, M. J., DeSoto, K. A., Giner-Sorolla, R., Krueger, J. I., Perugini, M., Ropovik, I., van ’t Veer, A. E., Vranka, M., & Lakens, D. (2023). Deciding what to replicate: A decision model for replication study selection under resource and knowledge constraints. Psychological Methods, 28(2), 438–451. https://doi.org/10.1037/met0000438
Aldhous, P. (2011). Journal rejects studies contradicting precognition. New Scientist. https://www.newscientist.com/article/dn20447-journal-rejects-studies-contradicting-precognition/
Stanley, D. J., & Spence, J. R. (2014). Expectations for Replications: Are Yours Realistic? Perspectives on Psychological Science, 9(3), 305–318. https://doi.org/10.1177/1745691614528518
Simonsohn, U. (2015). Small telescopes: Detectability and the evaluation of replication results. Psychological Science, 26(5), 559–569. https://doi.org/10.1177/0956797614567341
Nosek, B.A., Errington, T.M. (2017) Reproducibility in Cancer Biology: Making sense of replications. eLife 6:e23383. https://doi.org/10.7554/eLife.23383

21 snips
Jun 28, 2024 • 55min
Episode 37: Replicatio - I
In the next two episodes, we will discuss replication studies, which are essential to building reliable scientific knowledge.
Shownotes
Mack, R. W. (1951). The Need for Replication Research in Sociology. American Sociological Review, 16(1), 93–94. https://doi.org/10.2307/2087978
Smith, N. C. (1970). Replication studies: A neglected aspect of psychological research. American Psychologist, 25(10), 970–975. https://doi.org/10.1037/h0029774
Sidman, M. (1960). Tactics of Scientific Research: Evaluating Experimental Data in Psychology (New edition). Cambridge Center for Behavioral.
Ebersole, C. R., Mathur, M. B., Baranski, E., Bart-Plange, D.-J., Buttrick, N. R., Chartier, C. R., Corker, K. S., Corley, M., Hartshorne, J. K., IJzerman, H., Lazarević, L. B., Rabagliati, H., Ropovik, I., Aczel, B., Aeschbach, L. F., Andrighetto, L., Arnal, J. D., Arrow, H., Babincak, P., … Nosek, B. A. (2020). Many Labs 5: Testing Pre-Data-Collection Peer Review as an Intervention to Increase Replicability. Advances in Methods and Practices in Psychological Science. https://doi.org/10.1177/2515245920958687
Isager, P. M., van Aert, R. C. M., Bahník, Š., Brandt, M. J., DeSoto, K. A., Giner-Sorolla, R., Krueger, J. I., Perugini, M., Ropovik, I., van ’t Veer, A. E., Vranka, M., & Lakens, D. (2023). Deciding what to replicate: A decision model for replication study selection under resource and knowledge constraints. Psychological Methods, 28(2), 438–451. https://doi.org/10.1037/met0000438
Aldhous, P. (2011). Journal rejects studies contradicting precognition. New Scientist. https://www.newscientist.com/article/dn20447-journal-rejects-studies-contradicting-precognition/
Stanley, D. J., & Spence, J. R. (2014). Expectations for Replications: Are Yours Realistic? Perspectives on Psychological Science, 9(3), 305–318. https://doi.org/10.1177/1745691614528518
Simonsohn, U. (2015). Small telescopes: Detectability and the evaluation of replication results. Psychological Science, 26(5), 559–569. https://doi.org/10.1177/0956797614567341

4 snips
Jun 21, 2024 • 28min
Prologus 37: Replication studies: A neglected aspect of psychological research (N. C. Smith)
Nathaniel C. Smith, a pioneering psychologist, discusses the critical yet overlooked role of replication studies in psychological research. He reveals how neglecting these studies has led to significant biases and challenges in validating findings. Smith highlights the influence of participant backgrounds and experimental conditions on research outcomes. By advocating for tailored methodologies, he emphasizes the need for reliable and generalizable data to enhance the credibility of psychological theories.

Jun 14, 2024 • 1h 12min
Episode 36: Leges Eponymae
In this episode, we discuss a fun mix of eponymous laws, which are laws named after individuals who postulate them.
Shownotes
Campbell, D. T. (1979). Assessing the impact of planned social change. Evaluation and Program Planning, 2(1), 67–90. https://doi.org/10.1016/0149-7189(79)90048-X
Merton, R. K. (1995). The Thomas Theorem and the Matthews Effect. Social Forces, 74(2), 379–422.
Stigler, S. M. (1980). Stigler’s Law of Eponymy*. Transactions of the New York Academy of Sciences, 39(1 Series II), 147–157. https://doi.org/10.1111/j.2164-0947.1980.tb02775.x
Clarke, A. C. (Arthur C. (1962). Profiles of the future: An inquiry into the limits of the possible. New York : Bantam Books. http://archive.org/details/profilesoffuture00clar
Brandolini’s Law: Based on a tweet, after reading Kahneman Thinking fast and slow: https://twitter.com/ziobrando/status/289635060758507521
Preston, I. L. (1980). Researchers at the Federal Trade Commission—Peril and Promise. Current Issues and Research in Advertising, 3(1), 1–15.
Twyman’s Law: “The more unusual or interesting the data, the more likely they are to have been the result of an error of one kind or another.” Earliest scholarly reference is in Journal of the Royal Statistical Society, Series A, Vol 138, No 4, 1975. The Teaching of Statistics by A. S. C. Ehrenberg.
Bloch, A. (1990). Murphy's law complete: All the reasons why everything goes wrong. Arrow Books Limited.

May 31, 2024 • 1h 8min
Episode 35: Praedictio Clinica Versus Statistica
In this final episode of the three-part series on the Philosophical Psychology lectures by Paul Meehl, we discuss lectures 6-8, which cover the ten obfuscating factors in "soft areas" of psychology and a host of advice Meehl provides for researchers, reviewers, editors, and educators on how to improve practice.
Shownotes
Krefeld-Schwalb, A., Sugerman, E. R., & Johnson, E. J. (2024). Exposing omitted moderators: Explaining why effect sizes differ in the social sciences. Proceedings of the National Academy of Sciences, 121(12), e2306281121. https://doi.org/10.1073/pnas.2306281121
Lakens, D., & Etz, A. J. (2017). Too True to be Bad: When Sets of Studies With Significant and Nonsignificant Findings Are Probably True. Social Psychological and Personality Science, 8(8), 875–881. https://doi.org/10.1177/1948550617693058

May 17, 2024 • 1h 14min
Episode 34: Aestimatio et Emendatio Theoriarum
In this episode, we continue the discussion of Meehl's Philosophy of Psychology course, focusing on lectures 3, 4, and 5.
Shownotes
The quote "Don't make a mockery of honest ad-hockery" is probably from Clark Glymour: https://en.wikipedia.org/wiki/Clark_Glymour
Good, I. J. (1965). The Estimation of Probabilities: An Essay on Modern Bayesian Methods. M.I.T. Press.
Shepard, R. N. (1987). Toward a universal law of generalization for psychological science. Science, 237(4820), 1317–1323.

10 snips
May 10, 2024 • 1h 2min
Prologus 34: Using scientific methods to resolve questions in the history and philosophy of science (Faust & Meehl)
D. Faust and P. E. Meehl discuss using scientific methods in the history and philosophy of science. They cover topics like the evolution of the scientific method, role of case studies, sampling techniques, theory selection, psychosocial properties, evaluation of theories, and truth likeness in science.

6 snips
May 3, 2024 • 59min
Episode 33: Risicae Theoreticae et Asterisci Tabulares
Video lectures: https://meehl.umn.edu/video
Faust, D., & Meehl, P. E. (1992). Using scientific methods to resolve questions in the history and philosophy of science: Some illustrations. Behavior Therapy, 23(2), 195–211. https://doi.org/10.1016/S0005-7894(05)80381-8
Serlin, R. C., & Lapsley, D. K. (1985). Rationality in psychological research: The good-enough principle. American Psychologist, 40(1), 73–83. https://doi.org/10.1037/0003-066X.40.1.73
Meehl, P. E. (1990). Appraising and amending theories: The strategy of Lakatosian defense and two principles that warrant it. Psychological Inquiry, 1(2), 108–141. https://doi.org/10.1207/s15327965pli0102_1
Meehl, P. E. (1992). Cliometric metatheory: The actuarial approach to empirical, history-based philosophy of science. Psychological Reports, 71, 339–467.

8 snips
Apr 26, 2024 • 40min
Prologus 33: Paul E. Meehl
In advance of the next three episodes discussing the Philosophical Psychology lectures by Paul E. Meehl, we present a brief reading from his autobiography in A history of psychology in autobiography.
Meehl, P. E. (1989). Paul E. Meehl. In G. Lindzey (Ed.), A history of psychology in autobiography (Vol. 8, pp. 337–389). Stanford, CA: Stanford University Press.


