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Gjalt-Jorn Peters

@matherion@mastodon.nl
mastodon 4.6.5+procolix.mnl
  • Open on mastodon.nl

Striving for validity, not validation 📏🧠

Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands.

Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity.

🧠#BehaviorChange & #Psychology
🔬#OpenScience
📈 #Methodology & #Statistics
🎙️ #QualitativeMethods
💻 #rstats, #r, @rstats@gup.pe
🗺 #InterventionMapping
🌃🎶 #Nightlife risk behavior
🍻💊 #Substance use

and

4🐈

they/him

1273 Followers
1443 Following
10 Posts
Joined November 01, 2022
Site:
https://behaviorchange.eu
#r #rstats 📦:
https://opens.science
Open Science:
https://osf.io/txfec
OpenAlex (publications):
https://openalex.org/authors/a5039009028

Posts

Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Jan 29, 2026
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl

RE: @CryptPad@social.xwiki.com

Today you get 50% off at CryptPad! 🥳

If you ever thought in the past year or so that it might be good to become less dependent of ditch US Big Tech, this is the time! 🤩

Nice move to simultaneously get a safe place for your documents *and* support development of sovereign Open Infrastructure in Europe ✊

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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Jan 07, 2026
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl
Replying to @matherion@mastodon.nl
By the way - the actual *development* on {qualchemy} is done by the awesome @romainfrancois@mastodon.social - highly recommended if you have any #Rstats needs or wishes 🤩
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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Jan 07, 2026
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl
Replying to @matherion@mastodon.nl
The Reproducible Open Coding Kit (the ROCK 🤘) is a standard for open qualitative research, born in 2018, and with v1 in https://doi.org/qcf6 a tutorial in https://doi.org/jrfb and more basics at https://sciencer.eu/posts/2024-12-rock-basics.html With an NWO #OpenScience grant, Szilvia Zorgo and me are now working on a number of new resources for the ROCK, and one is the #RStats package {qualchemy} 🔮, which converts between REFI-QDA projects (whihc Atlas, NVivo, MaxQDA, Dedoose export to) and ROCK projects. 🧵 3/3
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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Jan 07, 2026
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl
Replying to @matherion@mastodon.nl
If you use proprietary qualitative analysis software, it would be great if you can help. To test and improve this new software ({qualchemy} 🔮), we need two things: 1️⃣ More exported projects (in REFI-QDA format) file so we can test imports; 2️⃣ Tests where a project exported by {qualchemy} is imported into proprietary software. In return, we will happily give you an intro re: the Reproducible Open Coding Kit (the ROCK 🤘) and help you open up your projects if you want. 🧵 2/3
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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Jan 07, 2026
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl

Dear #QualitativeResearch people! 🎙️

We need your help - more specifically, your exported projects 🙂 We're working on a way to liberate qualitative projects from Closed, proprietary software such as NVivo, Atlas, MaxQDA, Dedoose, etc.

This project will allow converting projects exported to the REFI-QDA file format to the Reproducible Open Coding Kit project format, which is much more accessible, much simpler to work with in other software, and so lends itself better for #OpenScience.

🧵 1/3

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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Jan 07, 2026
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl

The UNESCO Open Science Recommendation was adopted by the UN member states in 2021.

Open Infra is an important part: science should use publicly/community-owned infrastructure and avoid proprietary software and platforms.

This means Open Science requires some switches, eg:

👉️ Qualtrics 🔁 LimeSurvey/formr

👉️ NVivo/Atlas/MaxQDA 🔁 QualCoder/ROCK

👉️ Mendeley/Endnote 🔁 Zotero

👉️ SPSS/SAS/STATA 🔁 jamovi/JASP/R

Who would you say share the responsibility for making these changes?

[ please boost! 🙏 ]

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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Oct 16, 2025
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl
Replying to @matherion@mastodon.nl
@auzdavenice @ingorohlfing (Come to think of it - the statistical framing that is often used when discussing preregistration probably does more harm than good)
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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Oct 16, 2025
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl
Replying to @auzdavenice@mastodon.social
@auzdavenice @ingorohlfing I share Alex' perspective here. For example, look at this one, a qualitative, observational study without hypotheses: https://osf.io/ns2z6/overview We just say what we expect to observe. You always have _some_ idea, otherwise you wouldn't engage in an exercise (at least not with public funds hopefully 😬), and the prereg is just describing what you know/plan/expect in advance. This may not be common in some area's, but it's possible everywhere, including e.g. law I think.
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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Aug 09, 2024
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl
Replying to @Brendan@phpc.social
@Brendan@phpc.social @davewalker@mastodon.social Just wanted to chime in: yes, this is awesome @davewalker@mastodon.social, thank you! And yes, the t-shirt is a great idea, the first person I shared it with also immediately responded that they wanted a t-shirt with that 🙂 You could maybe consider licensing it under CC-BY, so that everybody's allowed to print it on whatever they want? That way it wouldn't cost you any time 🙂 (maybe a stupid idea for lots of reasons, but as we say in NL: You already have 'no', you might get 'yes' 🙂
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Open post
matherion
Gjalt-Jorn Peters @matherion@mastodon.nl · Dec 03, 2023
Gjalt-Jorn Peters
@matherion@mastodon.nl

Striving for validity, not validation 📏🧠 Associate professor of Theory, Methods & Statistics, Psychology, Open University of the Netherlands. Started out in behavior change research & intervention development and shifted towards methodology, measurement and validity. 🧠#BehaviorChange & #Psychology 🔬#OpenScience 📈 #Methodology & #Statistics 🎙️ #QualitativeMethods 💻 #rstats, #r, @rstats@gup.pe 🗺 #InterventionMapping 🌃🎶 #Nightlife risk behavior 🍻💊 #Substance use and 4🐈 they/him

mastodon.nl
Replying to @djfiander@code4lib.social
@djfiander@code4lib.social @RustyBertrand@toot.wales @maryrobinette@wandering.shop Wow, cool that you know it, thanks 🤩 I actually needed this to realize the original part was a joke 🤦
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