#pvalues

Gilles DePemig :OpenAccess:DePemig@social.coop
2025-05-22

@lakens Your discussion of #pvalues is really a bit odd. "Just calculate a number that has no real interpretation, and then interpret it cautiously."* That's bogus.

Importantly, you missed the opportunity to making the point that, relatively, your p-values do have an interpretation: If you order your effects by p-value from low to high, the top of this list contains better candidates for a future study than the bottom.

*these are my words paraphrasing/interpreting Daniel Lakens

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-05-06

#337 Confidence intervals and tests are two sides of the same research question

Thoughts: Comment describing the connection between NHST p-values/test and Confidence Intervals (CI).

doi.org/10.3389/fpsyg.2015.000

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-03-27

#309 The statistical significance filter leads to overoptimistic expectations of replicability

Thoughts: Not sure how many researchers interpret p-values are indexes of replicability, but they shouldn't.

doi.org/10.1016/j.jml.2018.07.

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-03-14

#300 (!!!) ๐Ÿฅณ๐ŸŽ‰
Beyond the forest plot: The drapery plot

Thoughts: I can't believe they didn't call these 'tepee plots'.
I think they are cluttered, but can be useful.

doi.org/10.1002/jrsm.1410

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-03-12

#298 Replication: Do not trust your p-value, be it small or large

Thoughts: Even under exact replications, a p-values is not very good at predicting the p-value in a future study. p=.05 ~ 50% rep.

physoc.onlinelibrary.wiley.com

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-03-07

#295 The Fallacy of the Null-Hypothesis Significance Test

Thoughts: "the [..] aim of a scientific experiment is not to precipitate decisions, but to make an appropriate adjustment in the degree to which one accepts, or believes, the hypothesis"

stats.org.uk/statistical-infer

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-02-27

#289 The meaning of significance in data testing

Thoughts: Fisherian significance testing =/= Neyman-Pearson statistical hypothesis testing. Many debates on p-values and frequentist stats are due to this confusion.

doi.org/10.3389/fpsyg.2015.012

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-02-25

#287 Dance of the p Values

Thoughts: One of my go-to demonstrations for the variability of p-values, and why they say so little about a study.

youtu.be/5OL1RqHrZQ8

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-02-04

#272 Different meanings of p-values

Thoughts: A riveting (& confusing) discussion on the definitions & properties of p-values. W/ guest appearance from some big names in stats, from all camps.

statmodeling.stat.columbia.edu

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2025-01-10

#255 The p-value and model specification in statistics

Thoughts: Little thought is given to the appropriateness of the test and its assumptions.

gpsych.bmj.com/content/32/3/e1

2024-12-29

"In real life, we weigh the anticipated consequences of the decisions that we are about to make. That approach is much more rational than limiting the percentage of making the error of one kind in an artificial (null hypothesis) setting or using a measure of evidence for each model as the weight."
Longford (2005) stat.columbia.edu/~gelman/stuf

#modeling #nullHypothesis #probability #probabilities #pValues #statistics #stats #statisticalLiteracy #bias #inference #modelling #regression #linearRegression

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2024-11-28

#234 Not all alphas can be justified

Thoughts: When using discrete distributions, with few outcomes, your alpha cannot always take the values you want. Same with the distribution of p-values under the null.

osf.io/preprints/psyarxiv/erwvk

2024-11-21

Surveys, coincidences, statistical significance ๐Ÿงต

"What Educated Citizens Should Know About Statistics and Probability"
By Jessica Utts, in 2003: ics.uci.edu/~jutts/AmerStat200 via @hrefna

@edutooters

#nullHypothesis #probability #probabilities #pValues #statistics #stats #education #higherEd #statisticalLiteracy #bias #media #causalInference

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2024-11-05

#217 The distribution of p-values obtained in replications depends only on the original p-value. How can it be true?

Thoughts: A great discussion where the author @thenewstats chimes in to explain the issue.

guyjantic has moved!guyjantic@c.im
2024-11-03

Jacob Cohen: we, as teachers, consultants, authors, and otherwise perpetrators of quantitative methods, are responsible for the ritualization of null hypothesis significance testing,,, to the point of meaninglessness and beyond.

Wendy's teenager: Um, sir...

#whycharactergotsirthisiswendys
#hashtaggames

#psychology #statistics #pvalues #rants

Coach Pฤแน‡ini ยฎpaninid@mastodon.world
2024-11-01
An awareness of the history of p-values might elp deflate their swollen stature and encourage more judicious use. We were surprised to learn, in the course of writing this article, that the p < 0.05 cutoff was established as a competitive response to a disagreement over book royalties between two foundational statisticians. In the early 1920s, Kendall Pearson, whose income depended on the sale of extensive statistical tables, was unwilling to allow Ronald A. Fisher to use them in his new book. To work around this barrier, Fisher created a method of inference based on only two values: p-values of 0.05 and 0.01 (Hurlbert and Lombardi,
2009). Fisher himself later admitted that Pearson's more continuous method of inference was better than his binary approach: "no scientific worker has a fixed level of significance at which from year to year, and in all circumstances, he rejects [null] hypotheses; he rather gives his mind to each particular case in the light of his evidence and ideas (Hurlbert and Lombardi, 2009: 316). A fair interpretation of this history is that we use p-values at east in part because a statistician from the 1920s was afraid that sharing his work would undermine his income
Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2024-10-24

#209 Limitations of empirical calibration of p-values using observational data

Thoughts: Obs. research doesn't need p-values (imo) but ppl keep tryin to make'em happen

pmc.ncbi.nlm.nih.gov/articles/
rebuttal
pubmed.ncbi.nlm.nih.gov/275925

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2024-09-23

#186 Are Multiple Contrast Tests Superior to the ANOVA?

Thoughts: Focuses more on the statistical aspects of the comparison than the theoretical ones. But insightful for newbies.


degruyter.com/document/doi/10.

Dr Mircea Zloteanu ๐ŸŒผ๐Ÿmzloteanu
2024-09-17

#182 P-values as percentiles

Thoughts: "The percentile heuristic is a more accurate model [] for interpreting observed p-values."

doi.org/10.3389%2Ffpsyg.2015.0

Client Info

Server: https://mastodon.social
Version: 2025.04
Repository: https://github.com/cyevgeniy/lmst