Constantin Späth
@cspaeth.bsky.social
Sport and Exercise Psychology, University of Potsdam, Germany
Reposted by Constantin Späth
New 'Preliminary Report' submission format at Science and Medicine in Football. An idea that should be interesting for other journals! Explicitly make space for honestly reported smaller sample-size studies www.tandfonline.com/doi/full/10....
November 6, 2025 at 2:40 PM
New 'Preliminary Report' submission format at Science and Medicine in Football. An idea that should be interesting for other journals! Explicitly make space for honestly reported smaller sample-size studies www.tandfonline.com/doi/full/10....
It seems, I was not up-to-date. Discipline specific examples have already been discussed, or should I say "will be discussed" ;)
Your output is insane! @crist14n.bsky.social
sportrxiv.org/index.php/se...
bsky.app/profile/cspa...
Your output is insane! @crist14n.bsky.social
sportrxiv.org/index.php/se...
bsky.app/profile/cspa...
November 6, 2025 at 1:13 PM
It seems, I was not up-to-date. Discipline specific examples have already been discussed, or should I say "will be discussed" ;)
Your output is insane! @crist14n.bsky.social
sportrxiv.org/index.php/se...
bsky.app/profile/cspa...
Your output is insane! @crist14n.bsky.social
sportrxiv.org/index.php/se...
bsky.app/profile/cspa...
Reposted by Constantin Späth
The package formerly known as papercheck has changed its name to metacheck! We're checking more than just papers, with functions to assess OSF projects, github repos, and AsPredicted pre-registrations, with more being developed all the time.
scienceverse.github.io/metacheck/
scienceverse.github.io/metacheck/
Check Research Outputs for Best Practices
A modular, extendable system for automatically checking research outputs for best practices using text search, R code, and/or (optional) LLM queries.
scienceverse.github.io
November 3, 2025 at 4:20 PM
The package formerly known as papercheck has changed its name to metacheck! We're checking more than just papers, with functions to assess OSF projects, github repos, and AsPredicted pre-registrations, with more being developed all the time.
scienceverse.github.io/metacheck/
scienceverse.github.io/metacheck/
Just discovered this great preprint by
@crist14n.bsky.social @lakens.bsky.social
sportrxiv.org/index.php/se...
I wish someone had given me tutorials/easy-to-understand explanations like these when I was doing my bachelor's degree!
@crist14n.bsky.social @lakens.bsky.social
sportrxiv.org/index.php/se...
I wish someone had given me tutorials/easy-to-understand explanations like these when I was doing my bachelor's degree!
What is your hypothesis? : On the importance of knowing your hypothesis before conducting a hypothesis test
| SportRxiv
sportrxiv.org
November 2, 2025 at 9:34 AM
Just discovered this great preprint by
@crist14n.bsky.social @lakens.bsky.social
sportrxiv.org/index.php/se...
I wish someone had given me tutorials/easy-to-understand explanations like these when I was doing my bachelor's degree!
@crist14n.bsky.social @lakens.bsky.social
sportrxiv.org/index.php/se...
I wish someone had given me tutorials/easy-to-understand explanations like these when I was doing my bachelor's degree!
Reposted by Constantin Späth
Relatedly, I think SESOI is a tremendously useful and under-appreciated concept. It's become a regular tool in my power analysis workflows, and I wish I understood it sooner in my career.
Great points about the clarity the SESOI brings in this context
There still seems to be a lot of confusion about significance testing in psych. No, p-values *don’t* become useless at large N. This flawed point also used to be framed as "too much power". But power isn't the problem – it's 1) unbalanced error rates and 2) the (lack of a) SESOI. 1/ >
October 31, 2025 at 3:42 PM
Relatedly, I think SESOI is a tremendously useful and under-appreciated concept. It's become a regular tool in my power analysis workflows, and I wish I understood it sooner in my career.
Reposted by Constantin Späth
These are exactly the right discussions to have IMO, especially when they help us better understand what knowledge we need (and might still be missing) for setting up meaningful, informative tests.
October 31, 2025 at 10:28 AM
These are exactly the right discussions to have IMO, especially when they help us better understand what knowledge we need (and might still be missing) for setting up meaningful, informative tests.
Reposted by Constantin Späth
I think the thing that most people struggle with though is how to set that SESOI... @cspaeth.bsky.social and I been chatting about it in this thread (and I give examples of how we've gone about it... though our recent theory prediction + practical SESOI is best I think) bsky.app/profile/cspa...
New Commentary published in the German Journal for Sport and Exercise Research, emphasizing not only the need to specify a SESOI when testing a claim, but recommending also to start a discussion about best practices to determine a SESOI
link.springer.com/article/10.1...
From best practices to severe testing: A methodological response to Büsch and Loffing (2024) - German Journal of Exercise and Sport Research
This commentary builds on the Büsch and Loffing (2024) exploration of methodological best practices for validly evaluating intervention studies. Extending their perspective, it is argued that research...
link.springer.com
October 31, 2025 at 10:16 AM
I think the thing that most people struggle with though is how to set that SESOI... @cspaeth.bsky.social and I been chatting about it in this thread (and I give examples of how we've gone about it... though our recent theory prediction + practical SESOI is best I think) bsky.app/profile/cspa...
Reposted by Constantin Späth
There still seems to be a lot of confusion about significance testing in psych. No, p-values *don’t* become useless at large N. This flawed point also used to be framed as "too much power". But power isn't the problem – it's 1) unbalanced error rates and 2) the (lack of a) SESOI. 1/ >
But here's, the thing, p values and significance become useless at such large sample sizes. When you're dividing the coefficient by the SE and the sample size is in the tens of thousands, EVERYTHING IS SIGNIFICANT. All you're testing is whether the coefficient is different than zero.
October 31, 2025 at 8:13 AM
There still seems to be a lot of confusion about significance testing in psych. No, p-values *don’t* become useless at large N. This flawed point also used to be framed as "too much power". But power isn't the problem – it's 1) unbalanced error rates and 2) the (lack of a) SESOI. 1/ >
New Commentary published in the German Journal for Sport and Exercise Research, emphasizing not only the need to specify a SESOI when testing a claim, but recommending also to start a discussion about best practices to determine a SESOI
link.springer.com/article/10.1...
From best practices to severe testing: A methodological response to Büsch and Loffing (2024) - German Journal of Exercise and Sport Research
This commentary builds on the Büsch and Loffing (2024) exploration of methodological best practices for validly evaluating intervention studies. Extending their perspective, it is argued that research...
link.springer.com
October 30, 2025 at 9:43 PM
New Commentary published in the German Journal for Sport and Exercise Research, emphasizing not only the need to specify a SESOI when testing a claim, but recommending also to start a discussion about best practices to determine a SESOI
link.springer.com/article/10.1...
Reposted by Constantin Späth
My paper with @lakens.bsky.social and @annaveer.bsky.social - “Replication value as a function of citation impact and sample size” - has just been published in Meta psychology! open.lnu.se/index.php/me...
October 30, 2025 at 9:11 AM
My paper with @lakens.bsky.social and @annaveer.bsky.social - “Replication value as a function of citation impact and sample size” - has just been published in Meta psychology! open.lnu.se/index.php/me...
"the very core of science – an institution that promotes mutual criticism, while accepting our fallibility"
bsky.app/profile/lake...
bsky.app/profile/lake...
New blog post: Why we should stop using statistical techniques that have not been adequately vetted by experts in psychology daniellakens.blogspot.com/2025/10/why-... where I reflect on how we should check the quality of novel statistical techniques.
October 29, 2025 at 8:02 AM
"the very core of science – an institution that promotes mutual criticism, while accepting our fallibility"
bsky.app/profile/lake...
bsky.app/profile/lake...
Reposted by Constantin Späth
New release of PowerLMM.js! Browser-based power analysis for longitudinal models with dropout.
Now includes:
- Power analysis summary report
- Reproducible & shareable configs (URL/JSON)
- Calculations validated against R
- Hypothesis region visualization
powerlmmjs.rpsychologist.com
Now includes:
- Power analysis summary report
- Reproducible & shareable configs (URL/JSON)
- Calculations validated against R
- Hypothesis region visualization
powerlmmjs.rpsychologist.com
October 28, 2025 at 2:02 PM
New release of PowerLMM.js! Browser-based power analysis for longitudinal models with dropout.
Now includes:
- Power analysis summary report
- Reproducible & shareable configs (URL/JSON)
- Calculations validated against R
- Hypothesis region visualization
powerlmmjs.rpsychologist.com
Now includes:
- Power analysis summary report
- Reproducible & shareable configs (URL/JSON)
- Calculations validated against R
- Hypothesis region visualization
powerlmmjs.rpsychologist.com
Reposted by Constantin Späth
We're struggling to get reviews for our recent stage 1 at @pci-regreports.bsky.social
www.medrxiv.org/content/10.1...
If you've expertise in the methods proposed and/or subject area and would be happy to review then please get in contact and I can let the recommender handling the submission know.
www.medrxiv.org/content/10.1...
If you've expertise in the methods proposed and/or subject area and would be happy to review then please get in contact and I can let the recommender handling the submission know.
Preserving musculoskeletal health through resistance training in individuals undergoing Glucagon-like Peptide-1 Receptor Agonist Therapy: a controlled interrupted time-series analysis (Stage 1 Registe...
Glucagon-like peptide-1 receptor agonists (GLP-1-RAs) are increasingly prescribed for weight loss and cardiometabolic health but have been evidenced to lead to loss of lean soft tissue mass. Resistanc...
www.medrxiv.org
October 24, 2025 at 3:26 PM
We're struggling to get reviews for our recent stage 1 at @pci-regreports.bsky.social
www.medrxiv.org/content/10.1...
If you've expertise in the methods proposed and/or subject area and would be happy to review then please get in contact and I can let the recommender handling the submission know.
www.medrxiv.org/content/10.1...
If you've expertise in the methods proposed and/or subject area and would be happy to review then please get in contact and I can let the recommender handling the submission know.
Reposted by Constantin Späth
I think this is kind of neat and I don't think anyone else has noticed it (I've looked and I can't find anyone who has) osf.io/preprints/so...
Maybe I should back off "justification" language, but it's at least a remarkable coincidence. I still think someone else *must* have noticed it...
Maybe I should back off "justification" language, but it's at least a remarkable coincidence. I still think someone else *must* have noticed it...
October 24, 2025 at 12:23 PM
I think this is kind of neat and I don't think anyone else has noticed it (I've looked and I can't find anyone who has) osf.io/preprints/so...
Maybe I should back off "justification" language, but it's at least a remarkable coincidence. I still think someone else *must* have noticed it...
Maybe I should back off "justification" language, but it's at least a remarkable coincidence. I still think someone else *must* have noticed it...
Reposted by Constantin Späth
It also reminded me of the “stats maven” concept coined by @sanjaysrivastava.com some very long time ago, I believe here? thehardestscience.com/2014/12/04/s...
October 22, 2025 at 4:18 PM
It also reminded me of the “stats maven” concept coined by @sanjaysrivastava.com some very long time ago, I believe here? thehardestscience.com/2014/12/04/s...
New study exploring a potential strategy for increasing affective responses during exercise while emphasizing the need to rigorously test related auxiliary assumptions and determine an SESOI for confirmatory research:
doi.org/10.1080/0264...
doi.org/10.1080/0264...
Making the exercise experience more pleasurable: Exploring the psychological effect of allowing intensity adjustments during exercise
Feeling good during exercise is a key predictor of whether people stay active. One factor thought to influence this is whether exercisers perceive control over their training intensity. A meta-anal...
doi.org
October 21, 2025 at 12:49 PM
New study exploring a potential strategy for increasing affective responses during exercise while emphasizing the need to rigorously test related auxiliary assumptions and determine an SESOI for confirmatory research:
doi.org/10.1080/0264...
doi.org/10.1080/0264...
Reposted by Constantin Späth
When is it appropriate to deviate from a pre-registration, and how should this be done? 🧐
Join us to find out from Daniël Lakens @lakens.bsky.social at the next ReproducibiliTea!
October 28, 1pm GMT.
Sign up: www.eventbrite.co.uk/e/when-and-h...
@tabeasch.bsky.social @reproducibilitea.org
Join us to find out from Daniël Lakens @lakens.bsky.social at the next ReproducibiliTea!
October 28, 1pm GMT.
Sign up: www.eventbrite.co.uk/e/when-and-h...
@tabeasch.bsky.social @reproducibilitea.org
When and How to Deviate From a Preregistration, with Prof Daniël Lakens
Prof Daniël Lakens will share guidance on appropriate circumstances and methods for deviating from a pre-registration
www.eventbrite.co.uk
October 13, 2025 at 10:41 AM
When is it appropriate to deviate from a pre-registration, and how should this be done? 🧐
Join us to find out from Daniël Lakens @lakens.bsky.social at the next ReproducibiliTea!
October 28, 1pm GMT.
Sign up: www.eventbrite.co.uk/e/when-and-h...
@tabeasch.bsky.social @reproducibilitea.org
Join us to find out from Daniël Lakens @lakens.bsky.social at the next ReproducibiliTea!
October 28, 1pm GMT.
Sign up: www.eventbrite.co.uk/e/when-and-h...
@tabeasch.bsky.social @reproducibilitea.org
Reposted by Constantin Späth
Final version of our high-powered, pre-registered test of theoretically derived precise predictions regarding comparative RT interventions (full vs lengthened partial range of motion) in trained particiapnts now published in Journal of Sport Sciences: doi.org/10.1080/0264...
The effects of lengthened-partial range of motion resistance training of the limbs on arm and thigh muscle area: A multi-site randomised trial
This project represents a highly powered pre-registered comparison of full ROM (fROM) and ‘lengthened partial’ ROM (lpROM) resistance training [RT]. A randomized controlled cluster trial across 15 ...
doi.org
October 8, 2025 at 10:18 AM
Final version of our high-powered, pre-registered test of theoretically derived precise predictions regarding comparative RT interventions (full vs lengthened partial range of motion) in trained particiapnts now published in Journal of Sport Sciences: doi.org/10.1080/0264...
Reposted by Constantin Späth
Doing the right thing, just because it is the right thing is underappreciated by academics.
October 4, 2025 at 9:30 AM
Doing the right thing, just because it is the right thing is underappreciated by academics.
"Each study has to be considered on its own. RCTs are fine, but they are just one of the techniques in the armory that one would use to try to discover things. Gold standard thinking is magical thinking."
medium.com/@timothyogde...
medium.com/@timothyogde...
Experimental Conversations: Angus Deaton
This is a chapter from the forthcoming book Experimental Conversations, to be published by MIT Press in 2016. The book collects interviews…
medium.com
October 2, 2025 at 4:58 PM
"Each study has to be considered on its own. RCTs are fine, but they are just one of the techniques in the armory that one would use to try to discover things. Gold standard thinking is magical thinking."
medium.com/@timothyogde...
medium.com/@timothyogde...
Reposted by Constantin Späth
why I’m happy to admit to my research failures, and you should too
https://www.newsbeep.com/uk/173671/
The open-science movement has promoted the sharing of scientific protocols, statistical-analysis programs and data files. These efforts have…
https://www.newsbeep.com/uk/173671/
The open-science movement has promoted the sharing of scientific protocols, statistical-analysis programs and data files. These efforts have…
why I’m happy to admit to my research failures, and you should too - United Kingdom News Beep
The open-science movement has promoted the sharing of scientific protocols, statistical-analysis programs and data files. These efforts have undoubtedly made
www.newsbeep.com
October 1, 2025 at 9:30 PM
why I’m happy to admit to my research failures, and you should too
https://www.newsbeep.com/uk/173671/
The open-science movement has promoted the sharing of scientific protocols, statistical-analysis programs and data files. These efforts have…
https://www.newsbeep.com/uk/173671/
The open-science movement has promoted the sharing of scientific protocols, statistical-analysis programs and data files. These efforts have…
Reposted by Constantin Späth
Now that this is done, I have no goals left in life.
meth.psychopen.eu/index.php/me...
(* I hope I can repeat this joke a few more times.)
#falsification #popper #science #replication #statistics #metascience
meth.psychopen.eu/index.php/me...
(* I hope I can repeat this joke a few more times.)
#falsification #popper #science #replication #statistics #metascience
September 30, 2025 at 9:44 AM
Now that this is done, I have no goals left in life.
meth.psychopen.eu/index.php/me...
(* I hope I can repeat this joke a few more times.)
#falsification #popper #science #replication #statistics #metascience
meth.psychopen.eu/index.php/me...
(* I hope I can repeat this joke a few more times.)
#falsification #popper #science #replication #statistics #metascience
Reposted by Constantin Späth
Sport and exercise science doesn't need papers telling researchers how to "make the most" of their small samples. The field needs to either grow the fuck up and collect sufficient data for adequate power/precision, or continue with their small samples but shut the fuck up and wait for a decent meta.
September 25, 2025 at 3:53 PM
Sport and exercise science doesn't need papers telling researchers how to "make the most" of their small samples. The field needs to either grow the fuck up and collect sufficient data for adequate power/precision, or continue with their small samples but shut the fuck up and wait for a decent meta.
Reposted by Constantin Späth
Not having to deviate from your preregistration is how you impress peers. You demonstrate you know something, because knowledge allows you to make good predictions. The more deviations, the less impressive the tests in a study are.
September 24, 2025 at 4:11 AM
Not having to deviate from your preregistration is how you impress peers. You demonstrate you know something, because knowledge allows you to make good predictions. The more deviations, the less impressive the tests in a study are.