115 research outputs found
SimonsohnSupplementalMaterial – Supplemental material for Two Lines: A Valid Alternative to the Invalid Testing of U-Shaped Relationships With Quadratic Regressions
No full textSupplemental material, SimonsohnSupplementalMaterial for Two Lines: A Valid Alternative to the Invalid Testing of U-Shaped Relationships With Quadratic Regressions by Uri Simonsohn in Advances in Methods and Practices in Psychological Science</p
SimonsohnOpenPracticesDisclosure – Supplemental material for Two Lines: A Valid Alternative to the Invalid Testing of U-Shaped Relationships With Quadratic Regressions
No full textSupplemental material, SimonsohnOpenPracticesDisclosure for Two Lines: A Valid Alternative to the Invalid Testing of U-Shaped Relationships With Quadratic Regressions by Uri Simonsohn in Advances in Methods and Practices in Psychological Science</p
sj-docx-1-amp-10.1177_25152459231207787 – Supplemental material for Interacting With Curves: How to Validly Test and Probe Interactions in the Real (Nonlinear) World
No full textSupplemental material, sj-docx-1-amp-10.1177_25152459231207787 for Interacting With Curves: How to Validly Test and Probe Interactions in the Real (Nonlinear) World by Uri Simonsohn in Advances in Methods and Practices in Psychological Science</p
99% impossible: a valid, or falsifiable, internal meta-analysis
No full textSeveral researchers have relied on, or advocated for, internal meta-analysis, which involves statistically aggregating multiple studies in a paper to assess their overall evidential value. Advocates of internal meta-analysis argue that it provides an efficient approach to increasing statistical power and solving the file-drawer problem. Here we show that the validity of internal meta-analysis rests on the assumption that no studies or analyses were selectively reported. That is, the technique is only valid if (a) all conducted studies were included (i.e., an empty file drawer), and (b) for each included study, exactly one analysis was attempted (i.e., there was no p-hacking). We show that even very small doses of selective reporting invalidate internal meta-analysis. For example, the kind of minimal p-hacking that increases the false-positive rate of 1 study to just 8% increases the false-positive rate of a 10-study internal meta-analysis to 83%. If selective reporting is approximately zero, but not exactly zero, then internal meta-analysis is invalid. To be valid, (a) an internal meta-analysis would need to contain exclusively studies that were properly preregistered, (b) those preregistrations would have to be followed in all essential aspects, and (c) the decision of whether to include a given study in an internal meta-analysis would have to be made before any of those studies are run
Uri Simonsohn's Quick Files
No full textThe Quick Files feature was discontinued and it’s files were migrated into this Project on March 11, 2022. The file URL’s will still resolve properly, and the Quick Files logs are available in the Project’s Recent Activity
Weather To Go To College
No full textDoes current utility bias predictions of future utility for high stakes decisions? Here I provide field evidence consistent with such Projection Bias in one of life's most thought-about decisions: college enrolment. After arguing and documenting with survey evidence that cloudiness increases the appeal of academic activities, I analyse the enrolment decisions of 1,284 prospective students who visited a university known for its academic strengths and recreational weaknesses. Consistent with the notion that "current" weather conditions influence decisions about "future" academic activities, I find that an increase in cloudcover of one standard deviation on the day of the visit is associated with an increase in the probability of enrolment of 9 percentage points. Copyright � The Author(s). Journal compilation � Royal Economic Society 2009.
Dataset for SSU 2014
No full text<p>Dataset for Silberzahn, R., Simonsohn, U., Uhlmann, E.L. (forthcoming). Matched Names Analysis Reveals No Evidence of Name Meaning Effects: A Collaborative Commentary on Silberzahn & Uhlmann (2013). [Commentary on Silberzahn & Uhlmann's “It pays to be Herr Kaiser: Germans with noble-sounding surnames more often work as managers than as employees.”] Psychological Science.</p
Spurious? Name Similarity Effects (Implicit Egotism) in Marriage, Job, and Moving Decisions
No full textThree articles published in the Journal of Personality and Social Psychology have shown that a disproportionate share of people choose spouses, places to live, and occupations with names similar to their own. These findings, interpreted as evidence of implicit egotism, are included in most modern social psychology textbooks and many university courses. The current article successfully replicates the original findings but shows that they are most likely caused by a combination of cohort, geographic, and ethnic confounds as well as reverse causality
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