merijn 😺📱📈
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merijnmestdagh.bsky.social
merijn 😺📱📈
@merijnmestdagh.bsky.social
Psychology | Statistics | Postdoc | Co-founder and developer #EMA #EMI #ESM platform http://m-Path.io
Very exciting to see the work from @katiehoemann.bsky.social at #SAA2025! Participants were able to voice record a description of events. Katie clustered these over many different topics. 2 fun ones:
- Complaints about rain (study was in Belgium 😅)
- Complaints about the study itself (ESM...)
May 27, 2025 at 11:52 AM
@rayyantutunji.bsky.social showing at #SAA2025 that wearable data (EPA) is not enough to predict mental well-being (R2 = 0.01). My bet is more on timing (triggering) surveys compared to leaving out surveys.

Impressed by the commitment to correct validation (not even touching test set until later)!
May 26, 2025 at 11:09 AM
Cool #SAA2025 talk from Niels van Hasbrouck about how an extreme response style can have a severe effect on affect dynamics.

Should we push everyone to have the same response style by only allowing discrete answers?
May 26, 2025 at 9:42 AM
Small new #EMI (ecological momentary intervention) feature that makes it very easy to create adaptive module screens or psycho education interventions. Used for:
- adaptive presentation of exercises
- Only show relevant modules for a participant (modules that actually interest the participant)
April 18, 2025 at 11:52 AM
1/3 From now on its easy to import and analyze #ESM / #EMA m-Path data in R! Lara Navarrete and Koen Niemeijer created an amazing R package to:
- Import m-Path data in R
- Preprocess
- Check participant response behavior
- Transform variables
- Analyze
- Link data with other #ESM/#EMA R packages
November 8, 2024 at 10:43 AM
📣m-Path Innovative Research Grant (MIRG) Announcement 📣

Apply now to run your original and innovative #EMA / #ESM study with a free m-Path premium account! 👩‍🎓📱

Repost = kind!
October 15, 2024 at 9:43 AM
Honorable mention for all the cans that Stijn collected over all these years :D.
September 19, 2024 at 9:52 AM
Yesterday we moved office from our offices at KU Leuven (university) to our new m-Path offices.

We took one last picture in front of the PSI. Some of us had worked here for more than 14 years.

PSI, you will be missed!
September 19, 2024 at 9:50 AM
Welcome everyone to this very first EMPOT tutorial!

The automated YouTube subtitles are not perfect yet :).

Currently creating 3 tutorial videos for researchers new to the m-Path/empot platform!
March 15, 2024 at 12:39 PM
Added new functions to PseudoR. PseudoR can be used to adapt a survey in real time. e.g.:
-as.responsetime: use to adapt a survey to a participant that answers too quickly
-distm: adapt survey if participant is close to a specific location
Let us know if you are still missing functions!
February 29, 2024 at 11:33 AM
New just Just-in-time Adaptive Intervention (#JITAI) of the day:
1) Assess location (GPS) in the background
2) Check if I am at my work
3) Trigger communication with m-Path server if I arrived
4) Automatically send mail to my colleagues urging them to come too!
January 24, 2024 at 9:52 AM
Created my first Just-in-time Adaptive Intervention (JITAI) this weekend:
1) I unlock my phone screen
2) App internally counts how often this happens
3) I get a notification when I use my phone too often

Hopefully we can roll out #JITAI features for everyone in a few weeks!
January 22, 2024 at 8:57 AM
📫Today we received a message packed with valuable (constructive) feedback about our platform. Obviously no platform is flawless, and user input is key to making it even better.

The more feedback we get, the better the platform becomes – keep it coming!
November 23, 2023 at 7:30 PM
📣 It's official!

We are launching our first m-Path Innovative Research Grant! 👩‍🎓

Apply now to run your original and innovative #EMA / #ESM study with a free m-Path premium account! 📱

More practical information: m-path.io/landing/mirg/

Repost = kind!
November 13, 2023 at 1:31 PM