Peder M Isager
@isager.bsky.social
Associate professor at Oslo New University College. Dungeon Master. Website: http://pedermisager.netlify.app
Reposted by Peder M Isager
New episode of Nullius In Verba! We discuss the jingle-jangle fallacy, the problem of vague concepts, how the incentive structures promote vagueness, why people who prefer more rigour have to be called the validity 'police', and much more!
nulliusinverba.podbean.com/e/episode-74...
nulliusinverba.podbean.com/e/episode-74...
Episode 74: Notiones Vague | Nullius in Verba
In this episode, we discuss the problems associated with vague concepts in psychological science. We talk about the jingle-jangle fallacy, the trade-off between broad concepts and more precise…
nulliusinverba.podbean.com
January 30, 2026 at 8:57 PM
New episode of Nullius In Verba! We discuss the jingle-jangle fallacy, the problem of vague concepts, how the incentive structures promote vagueness, why people who prefer more rigour have to be called the validity 'police', and much more!
nulliusinverba.podbean.com/e/episode-74...
nulliusinverba.podbean.com/e/episode-74...
Reposted by Peder M Isager
January 29, 2026 at 9:40 AM
Reposted by Peder M Isager
Just learned about this study looking at methodological trends in psych and econ over time: online.ucpress.edu/collabra/art....
Matches my perception well: Nobody in psych bothers to (explicitly) try causal inference unless they conducted an experiment, not a lot of theoretical work either.
Matches my perception well: Nobody in psych bothers to (explicitly) try causal inference unless they conducted an experiment, not a lot of theoretical work either.
January 29, 2026 at 9:41 AM
Just learned about this study looking at methodological trends in psych and econ over time: online.ucpress.edu/collabra/art....
Matches my perception well: Nobody in psych bothers to (explicitly) try causal inference unless they conducted an experiment, not a lot of theoretical work either.
Matches my perception well: Nobody in psych bothers to (explicitly) try causal inference unless they conducted an experiment, not a lot of theoretical work either.
Reposted by Peder M Isager
New blog post introducing Causion - a web app for causal inference teaching and learning: pedermisager.org/blog/causion....
Introducing Causion: A web app for playing with DAGs | Peder M. Isager
Personal website of Dr. Peder M. Isager
pedermisager.org
January 28, 2026 at 9:23 AM
New blog post introducing Causion - a web app for causal inference teaching and learning: pedermisager.org/blog/causion....
New blog post introducing Causion - a web app for causal inference teaching and learning: pedermisager.org/blog/causion....
Introducing Causion: A web app for playing with DAGs | Peder M. Isager
Personal website of Dr. Peder M. Isager
pedermisager.org
January 28, 2026 at 9:23 AM
New blog post introducing Causion - a web app for causal inference teaching and learning: pedermisager.org/blog/causion....
Reposted by Peder M Isager
🚨 SynthNet is out 🚨
Researchers propose new constructs and measures faster than anyone can track. We (@anniria.bsky.social @ruben.the100.ci) built a search engine to check what already exists and help identify redundancies; indexing 74,000 scales from ~31,500 instruments in APA PsycTests. 🧵1/3
Researchers propose new constructs and measures faster than anyone can track. We (@anniria.bsky.social @ruben.the100.ci) built a search engine to check what already exists and help identify redundancies; indexing 74,000 scales from ~31,500 instruments in APA PsycTests. 🧵1/3
November 26, 2025 at 11:42 AM
🚨 SynthNet is out 🚨
Researchers propose new constructs and measures faster than anyone can track. We (@anniria.bsky.social @ruben.the100.ci) built a search engine to check what already exists and help identify redundancies; indexing 74,000 scales from ~31,500 instruments in APA PsycTests. 🧵1/3
Researchers propose new constructs and measures faster than anyone can track. We (@anniria.bsky.social @ruben.the100.ci) built a search engine to check what already exists and help identify redundancies; indexing 74,000 scales from ~31,500 instruments in APA PsycTests. 🧵1/3
New blog post! ”Which variables to control for, and why”: pedermisager.org/blog/which-v...
In this post I give a beginner-friendly introduction to causal inference and statistical control, explaining why adjusting for the right variables clarifies relationships >
In this post I give a beginner-friendly introduction to causal inference and statistical control, explaining why adjusting for the right variables clarifies relationships >
Which variables to control for, and why | Peder M. Isager
Personal website of Dr. Peder M. Isager
pedermisager.org
November 17, 2025 at 3:00 PM
New blog post! ”Which variables to control for, and why”: pedermisager.org/blog/which-v...
In this post I give a beginner-friendly introduction to causal inference and statistical control, explaining why adjusting for the right variables clarifies relationships >
In this post I give a beginner-friendly introduction to causal inference and statistical control, explaining why adjusting for the right variables clarifies relationships >
Reposted by Peder M Isager
Join the next PMGS workshop where @ambra-prg.bsky.social will explain how to use Quarto for your reproducible research! 🔓🧑🔬
Registration is now open for our Quarto workshop at Paul Meehl Graduate School!
Join us on December 12 in Eindhoven to learn how to use Quarto for reproducible research and communication.
More details and registration here:
paulmeehlschool.github.io/2025-11-03-q...
Join us on December 12 in Eindhoven to learn how to use Quarto for reproducible research and communication.
More details and registration here:
paulmeehlschool.github.io/2025-11-03-q...
New workshop announced: Quarto: Write, Code, Reproduce | Paul Meehl Graduate School
We are thrilled to announce that registration is now open for our new workshop. In this workshop, Ambra Perugini will...
paulmeehlschool.github.io
November 13, 2025 at 12:14 PM
Join the next PMGS workshop where @ambra-prg.bsky.social will explain how to use Quarto for your reproducible research! 🔓🧑🔬
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...
Reposted by Peder M Isager
I built a DAG diagram with garden hoses for teaching.
Pictured: a collider bias diagram, inspired by a blocked pipe situation I experienced (which I credit with giving me the intuition though it also ruined my belongings in the flooded cellar).
Pictured: a collider bias diagram, inspired by a blocked pipe situation I experienced (which I credit with giving me the intuition though it also ruined my belongings in the flooded cellar).
October 28, 2025 at 5:50 PM
I built a DAG diagram with garden hoses for teaching.
Pictured: a collider bias diagram, inspired by a blocked pipe situation I experienced (which I credit with giving me the intuition though it also ruined my belongings in the flooded cellar).
Pictured: a collider bias diagram, inspired by a blocked pipe situation I experienced (which I credit with giving me the intuition though it also ruined my belongings in the flooded cellar).
Extremely honored to recieve Oslo New University College's science award for 2025. ONH has been a fantastic base to conduct my research at for the past 4 years, and I have an amazing team of colleagues around me to thank for that. From the bottom of my heart, thank you all!
September 26, 2025 at 1:50 PM
Extremely honored to recieve Oslo New University College's science award for 2025. ONH has been a fantastic base to conduct my research at for the past 4 years, and I have an amazing team of colleagues around me to thank for that. From the bottom of my heart, thank you all!
Reposted by Peder M Isager
Okay everyone, things are getting serious. I’m going to teach research methods again, 1st year psychology undergraduates. What would you cover with respects to philosophy of science, the research process etc.? I’m not very happy with the textbook stuff so I’m open to all ideas!
August 19, 2025 at 9:05 AM
Okay everyone, things are getting serious. I’m going to teach research methods again, 1st year psychology undergraduates. What would you cover with respects to philosophy of science, the research process etc.? I’m not very happy with the textbook stuff so I’m open to all ideas!
Reposted by Peder M Isager
An abbreviation (ABB) in a journal article (JA) or Grant Application (GA) is rarely worth the words it saves. Every ABB requires cognitive resources (CR) and at my age by the time I'm halfway through a JA or GA I no longer have the CR to remember what your ABB stood for.
August 15, 2025 at 9:39 AM
An abbreviation (ABB) in a journal article (JA) or Grant Application (GA) is rarely worth the words it saves. Every ABB requires cognitive resources (CR) and at my age by the time I'm halfway through a JA or GA I no longer have the CR to remember what your ABB stood for.
Can we infer causal relations from undirected network models of mental disorders? Some authors apparently say no. Personally, I don't see what network models are good for if they can't help us understand disease etiology (i.e. causality).
Quote from onlinelibrary.wiley.com/doi/10.1002/...
Quote from onlinelibrary.wiley.com/doi/10.1002/...
August 14, 2025 at 1:31 PM
Can we infer causal relations from undirected network models of mental disorders? Some authors apparently say no. Personally, I don't see what network models are good for if they can't help us understand disease etiology (i.e. causality).
Quote from onlinelibrary.wiley.com/doi/10.1002/...
Quote from onlinelibrary.wiley.com/doi/10.1002/...
New blog post! Why experiments are the gold standard for answering causal questions (pedermisager.org/blog/why-exp...). Many text books insist on experimental evidence to draw causal inferences bvut don't fully explain exactly what gives experiments their special powers.
August 8, 2025 at 10:33 AM
New blog post! Why experiments are the gold standard for answering causal questions (pedermisager.org/blog/why-exp...). Many text books insist on experimental evidence to draw causal inferences bvut don't fully explain exactly what gives experiments their special powers.
RE @nulliusinverba.bsky.social ep 59: Meehl seems to assume that research is harder than teaching; teachers should be paid less and if you can't do interesting research you're "demoted" to teaching. Why not the opposite? Why not pay teachers more and say "if you cannot teach, do"?
July 1, 2025 at 1:33 PM
RE @nulliusinverba.bsky.social ep 59: Meehl seems to assume that research is harder than teaching; teachers should be paid less and if you can't do interesting research you're "demoted" to teaching. Why not the opposite? Why not pay teachers more and say "if you cannot teach, do"?
Currently reading "Complex Systems Research in Psychology" (santafeinstitute.github.io/ComplexPsych/). If you're interested systems psychology/psychopathology, give this a read. van der Maas gives a very broad introduction to the topic, and supplements text with R code and practical exercises.
Complex Systems Research in Psychology
santafeinstitute.github.io
July 1, 2025 at 11:27 AM
Currently reading "Complex Systems Research in Psychology" (santafeinstitute.github.io/ComplexPsych/). If you're interested systems psychology/psychopathology, give this a read. van der Maas gives a very broad introduction to the topic, and supplements text with R code and practical exercises.
Reposted by Peder M Isager
I often talk about the need for psychology to improve. That is because I think it is worth improving. It would be very helpful if I could easily provide a few dozen examples of the contributions that have been made to support that conviction. I know they exist. I would just like them in one place.
June 26, 2025 at 6:37 AM
I often talk about the need for psychology to improve. That is because I think it is worth improving. It would be very helpful if I could easily provide a few dozen examples of the contributions that have been made to support that conviction. I know they exist. I would just like them in one place.
Just discovered "Mental health professionals’ attitudes towards the network theory of mental disorders" by @leahschumaker.bsky.social & Levente Kriston (osf.io/462cs). Fascinating read. Partly confirms suspicion I've had for a while that therapists see NTMD as "nothing new" (but see pub for details)
OSF
doi.org
June 26, 2025 at 8:03 AM
Just discovered "Mental health professionals’ attitudes towards the network theory of mental disorders" by @leahschumaker.bsky.social & Levente Kriston (osf.io/462cs). Fascinating read. Partly confirms suspicion I've had for a while that therapists see NTMD as "nothing new" (but see pub for details)
Reposted by Peder M Isager
My editorial on how journals can earn trust.
We often use journal names as proxies for quality. This is bad bc it’s not valid. But it could be. Editors could make journal name a valid signal. And we could place value on journals that show us how they do that.
journals.sagepub.com/doi/full/10....
We often use journal names as proxies for quality. This is bad bc it’s not valid. But it could be. Editors could make journal name a valid signal. And we could place value on journals that show us how they do that.
journals.sagepub.com/doi/full/10....
May 8, 2025 at 9:25 AM
My editorial on how journals can earn trust.
We often use journal names as proxies for quality. This is bad bc it’s not valid. But it could be. Editors could make journal name a valid signal. And we could place value on journals that show us how they do that.
journals.sagepub.com/doi/full/10....
We often use journal names as proxies for quality. This is bad bc it’s not valid. But it could be. Editors could make journal name a valid signal. And we could place value on journals that show us how they do that.
journals.sagepub.com/doi/full/10....
Reposted by Peder M Isager
There is still time to sign up for the last workshop of this academic year at PMGS, "Scientific Criticism and Peer Review," by @renebekkers.mastodon.social.ap.brid.gy
Check out the details here:
paulmeehlschool.github.io/workshops/cr...
Check out the details here:
paulmeehlschool.github.io/workshops/cr...
Scientific Criticism and Peer Review | Paul meehl Graduate School
June 6, 2025
paulmeehlschool.github.io
May 8, 2025 at 7:19 AM
There is still time to sign up for the last workshop of this academic year at PMGS, "Scientific Criticism and Peer Review," by @renebekkers.mastodon.social.ap.brid.gy
Check out the details here:
paulmeehlschool.github.io/workshops/cr...
Check out the details here:
paulmeehlschool.github.io/workshops/cr...
Reposted by Peder M Isager
Psych-DS is (1) spellcheck for your datasets and (2) a pathway to standardizing data in our academic fields that *everyone* can learn.
And it's live RIGHT NOW!
psych-ds.github.io
(This is the announcement post I've been leading up to)
And it's live RIGHT NOW!
psych-ds.github.io
(This is the announcement post I've been leading up to)
Psych-DS
A specification for psychological datasets. JSON metadata, predictable directory structure, and machine-readable specifications for tabular datasets.
psych-ds.github.io
April 9, 2025 at 7:37 PM
Psych-DS is (1) spellcheck for your datasets and (2) a pathway to standardizing data in our academic fields that *everyone* can learn.
And it's live RIGHT NOW!
psych-ds.github.io
(This is the announcement post I've been leading up to)
And it's live RIGHT NOW!
psych-ds.github.io
(This is the announcement post I've been leading up to)
I'll finally get to teach a workshop on one of my favourite subjects - causal inference - at the Paul Meehl graduate school may 9th! Ever wondered what the point is of controlling for variables in your regression analysis? Come find out with us!
A new free workshop of the Paul Meehl Graduate School is open for registration! On May 9 @isager.bsky.social will teach on Causal Inference and Variable Control. Check out the announcement below, and see you all @tue.nl!
paulmeehlschool.github.io/2025-04-02-c...
paulmeehlschool.github.io/2025-04-02-c...
New workshop announced: Causal Inference and Variable Control | Paul meehl Graduate School
We are excited to announce that registration is now open for the workshop “Causal Inference and Variable Control”. In this...
paulmeehlschool.github.io
April 3, 2025 at 4:35 PM
I'll finally get to teach a workshop on one of my favourite subjects - causal inference - at the Paul Meehl graduate school may 9th! Ever wondered what the point is of controlling for variables in your regression analysis? Come find out with us!
Reposted by Peder M Isager
The new workshop of Paul Meehl Graduate School, Causal Inference and Variable Control by @isager.bsky.social, is open for registration. Check out the announcement below:
paulmeehlschool.github.io/2025-04-02-c...
paulmeehlschool.github.io/2025-04-02-c...
New workshop announced: Causal Inference and Variable Control | Paul meehl Graduate School
We are excited to announce that registration is now open for the workshop “Causal Inference and Variable Control”. In this...
paulmeehlschool.github.io
April 2, 2025 at 2:26 PM
The new workshop of Paul Meehl Graduate School, Causal Inference and Variable Control by @isager.bsky.social, is open for registration. Check out the announcement below:
paulmeehlschool.github.io/2025-04-02-c...
paulmeehlschool.github.io/2025-04-02-c...
Reposted by Peder M Isager
Looking for a PhD/Postdoc in Switzerland? English speaking lab, good pay, incredible scenery.
There's lots of funding calls for projects related to my work on the meta-science of measurement, error detection and trustworthiness assessment. Reach out if you're interested in writing a grant together.
There's lots of funding calls for projects related to my work on the meta-science of measurement, error detection and trustworthiness assessment. Reach out if you're interested in writing a grant together.
March 6, 2025 at 8:31 AM
Looking for a PhD/Postdoc in Switzerland? English speaking lab, good pay, incredible scenery.
There's lots of funding calls for projects related to my work on the meta-science of measurement, error detection and trustworthiness assessment. Reach out if you're interested in writing a grant together.
There's lots of funding calls for projects related to my work on the meta-science of measurement, error detection and trustworthiness assessment. Reach out if you're interested in writing a grant together.