#statstab #371 Safeguard Power as a Protection Against Imprecise Power Estimates

Thoughts: tl;dr - when replicating a study, use the lower end of the CI of the original study as your effect in a power analysis.

#poweranalysis #samplesize #replication

https://journals.sagepub.com/doi/10.1177/1745691614528519

New blog post : Your Study Is Too Small (If You Care About Practically Significant Effects)

#effectsize #precision #poweranalysis #research #Psychology #MCID #SESOI #samplesize

https://open.substack.com/pub/mzloteanu/p/your-study-is-too-small-if-you-care?r=3b457w&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true

#statstab #230 Power and Sample Size Determination

Thoughts: Frequentist power is a complicated and non-intuitive thing, so it's good to read various tutorials/papers until you find one that sticks.

#stats #poweranalysis #power #NHST #effectsize

https://sphweb.bumc.bu.edu/otlt/mph-modules/bs/bs704_power/bs704_power_print.html

#statstab #192 Statistical Power from Pilot Data

Thoughts: One new use for pilot data - estimating the SE to power your study. If you can follow the formula. By @CarlisleRainey

#pilot #experiments #poweranalysis #standarderror #simulation #methodology

https://www.carlislerainey.com/blog/2024-06-03-pilot-power/

#statstab #189 Post Hoc Power: Not Empowering, Just Misleading

Thoughts: "the observed power is a 1:1 function of the P value" If you need a ref for why "post hoc" power is nonsense (paywalled).

#power #posthoc #QRPs #errorcontrol #poweranalysis

https://www.sciencedirect.com/science/article/pii/S0022480420305023

#statstab #155 Power & Sample Size calculations for ordinal data {Hmisc}

Thoughts: An appropriate sample size is just as important as an appropriate (ordinal) analysis. Nice guide for a 2-group design with a Likert-type DV.

#ordinal #NHST #poweranalysis

https://library.virginia.edu/data/articles/power-and-sample-size-calculations-ordered-categorical-data

Undo Arduino Encryption with an Oscilloscope https://hackaday.com/2024/07/14/undo-arduino-encryption-with-an-oscilloscope/ #SecurityHacks #poweranalysis #ArduinoHacks #cryptography #arduino #crypto #rsa

Undo Arduino Encryption with an Oscilloscope https://hackaday.com/2024/07/14/undo-arduino-encryption-with-an-oscilloscope/ #SecurityHacks #poweranalysis #ArduinoHacks #cryptography #arduino #crypto #rsa

Undo Arduino Encryption with an Oscilloscope - Cryptography ain’t easy. Seemingly small details like how many times a computation... - https://hackaday.com/2024/07/14/undo-arduino-encryption-with-an-oscilloscope/ #securityhacks #poweranalysis #arduinohacks #cryptography #arduino #crypto #rsa

it is very easy to tell two chips apart based on their startup power consumption. reset is negated at around 6500; after that moment, code starts executing. so the part before it should depend solely on the chip.

source: Gregory Hancock from Quantitude Podcast on X
#PowerAnalysis

Last week I attended the 6th Perspectives on Scientific Error Conference at @TUEindhoven
I learned so much! About #metascience #preregistration #replicability #qrp questionable research practices, methods to detect data fabrication, #peerreview, #poweranalysis artefacts in #ML machine learning...
I'm impressed by the commitment of participants to improve science through error detection & prevention. Thanks to the organizers Noah van Dongen, @lakens @annescheel Felipe Romero and @annaveer

Finishing my migration to #substack here is:

What NOT to do with NON-“null” results Part III: Underpowered study, but significant results https://open.substack.com/pub/mzloteanu/p/what-not-to-do-with-non-null-results?r=3b457w&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true
#rstats #statistics #poweranalysis #typeM #falsediscoveryrate #NHST

Statistical #PowerAnalysis currently dominates #ExperimentalDesign. In this Essay, @itchyshin &co argue that we should move away from the current focus on power analysis and instead encourage smaller scale studies & collaborative projects #PLOSBiology https://plos.io/48Gk8Og

How Good Is The Cheapest Generator On Amazon? https://hackaday.com/2024/01/04/how-good-is-the-cheapest-generator-on-amazon/ #electricalgenerator #poweranalysis #Reviews

How Good Is The Cheapest Generator On Amazon? - Although an internal combustion engine-based generator isn’t exactly one of the mo... - https://hackaday.com/2024/01/04/how-good-is-the-cheapest-generator-on-amazon/ #electricalgenerator #poweranalysis #reviews

Hello #statstodon! A reviewer asks me to perform a post-hoc #PowerAnalysis. I know this is generally not advised because if you replace the a priori effect size by the effect size measured in the experiment, this will introduce an erroneous relationship between the significance level of the test and the measured power.
… but does that mean that there is no proper way of measuring power retrospectively? For example, if you refrain from using the measured effect size and instead simulate a range of “a priori” effect size unrelated to the results of the test, then the dependency of the power to the significance level should not happen?
#stats #statschat @lakens

Had a lot of fun figuring out how modals work in Shiny in order to add this pop-up window of individual interaction simulations to my power analysis web app for interactions/moderation: https://david-baranger.shinyapps.io/InteractionPoweR_analytic/
#rstats #shiny #PowerAnalysis

Online #workshop:
Simulation-based power analyses in (generalized) linear mixed models
17.05.2023, 10-12h CEST

The workshop will cover basics of power analysis, linear mixed models, and why the combination of both requires a simulation-based approach.

In my experience, this is for many areas of #HealthSciences and #HRQL research a key problem when designing studies.

Maybe worth a read as well:
https://link.springer.com/article/10.3758/s13428-021-01546-0