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Yannick Morvan

@ymorvan.bsky.social
586 followers 1.1K following 103 posts

Psychologist PhD - Professor Université Paris Nanterre / Associate researcher Inserm CESP - Clinical FSEF & St-Anne Hospital - SHU - C3RP

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Reposted by Yannick Morvan
Omid V. Ebrahimi @omidvebrahimi.bsky.social · 24/09/2026
Tired of the centrality debate? Of seeing one application where centrality is influential & others where it's more arbitrary? We have the article for you: osf.io/preprints/ps... Turns out centrality can indeed matter; but when it does depends on underlying network structure & mechanism of spread 🧵
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
Actually they charge you for norms, you can use SF-36 or SF-20 see www.rand.org/health/surve... but indeed the SF-12 is not on public domain for non-commercial use
rand.org
36-Item Short Form Survey from the RAND Medical Outcomes Study
The 36-Item Short Form Health Survey (SF-36) is a set of generic, coherent, and easily administered quality-of-life measures.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
Last/ First institutional report (in French) is about to come out in july 2026 since for this kind of exercice a report in French is mandatory before publishing in scientific journals. Well that'it for now and sorry for the long story.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
24/24 So in 2024 we had the opportunity to make a follow-up from the 2023 National Student Survey respondant. Again there was some negociations and we were able to add PHQ9 and GAD7 to MHI-5 and CIDI-SF measures that we already had back in 2016.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
23/24 And yes I know about lack of longitudinal measurment invariance, I'm trying to be pedagogical about that since more than 10 years now ;) Anyway, COVID changed things a bit and mental health is way more on the political agenda now that it was 20 or even 10 years ago.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
22/24 So we had our first measure in 2016 and then, as a short tool and "close enough" to the old indicator, in 2020 National Student Survey MHI-5 was the new "mental health indicator". Again it is important to understand the logic behind to get trends with a "stable" indicator through time.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
21/24 Again no hard feelings, I can understand that and maybe I was not convincing or pedagogical enough. So I tried to adapt and just knowing well the French National Health Barometer, I propose to use its questionnaire as a basis. This is how we came to use MHI-5 and CIDI-SF with students.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
20/24 In this kind of situation there is an important discussion/negociation fabout what kind of indicators to choose and how long the survey will be. I made several proposition, some were rejected (sometimes mental health questions can be difficult to accept for people outside of our field).
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
19/24 So back in 2012 it was to short for 2013 national student survey but I got my chance in 2016 not with the usual national survey but we got an opportunity since the french government asked for more student health indicators in a new dedicated survey.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
18/24 And there was one existing "measure" of "well being" based on 5 yes/no items & I couldn't trace the origin of the scale (inspired from another scale, reformulation, made on the go). I proposed to change but with national survey the point is to get "stable" indicators throughout time
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
17/24 As a starting point, back in these days mental health wasn't much a preocupation. No hard feelings the observatory was more composed of sociologist and demographs. And they were doing a great job on many issues (housing, financial, academic conditions...) no problem there!
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
16/24 Then the story goes on how do we end up with MHI-5 in National Student Survey in France. In 2012 as a young assistant professor I joined the scientific board on the French National Student Observatory & one of my role there is to advocate for better mental health measures.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
15/24 This is what I call a moving perimeter that makes me being cautious on details such as this. Another usual suspect I like wich is not often clearly specified (even more without open science and code) is the precision around the threshold < or <= (sometimes this piece of info is just missing)
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
14/24 Going back to MHI-5 and measurement things can get difficult when not clearly specified. Usual suspect is rules with missing answers... if only one answer is included score can range from (1 to 25) and even if you use average, you can average with one to four missing answers.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
13/24 Side note to Dereck Briggs book p292 "What is measurement ? [...] the assignement of numerals to objects or events according to rules" (Stevens, 1946 Science) Of course there is more to this and please go listen to him on this wonderful podcast : quantitudepod.org/s3e12-the-hi...
quantitudepod.org
S3E12: The History of Measurement: A Conversation with Derek Briggs – QuantitudePod
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
12/24 In the French case you already see one hurdle, you can't use this transformation since one answer category is missing (ranging now from 5 to 25). So I guess colleagues used threshold of 56 as a % of max score (25) equivalent to 14 sum score of items.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
11/24 You might think how do I get a score ranging form 0 to 100 with 5 item ranging from 1 to 6 (range 6 to 30)? You need to transform by recoding each items and then averaging them (see www.rand.org/health/surve...)
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
10/24 But scoring categories is also something whe need to get a closer look at. Here you see some items and the MHI-5 items (24 25 26 28 30 available here : www.rand.org/health/surve...)
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
9/24 instead of 6 as initially validated (All of the time / Most of the time / A good bit of the time / Some of the time / A little of the time / None of the time) www.jclinepi.com/article/S089... (note I still don't know why a response category was dropped, coudn't trace the exact reason)
jclinepi.com
The French SF-36 Health Survey
This article reports on the main developmental stages and on the preliminary psychometric assessment of the final French version of the SF-36. A standard forward/backward translation procedure was fol...
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
8/24 This is probably because the MHI-5 in France used a different response scale format 5 categories (All of the time A good bit of the time / Some of the time / A little of the time / None of the time)
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
7/24 In the paper you can read "In this 5-point Likert scale, MH-5 can be used as a categorical instrument with a cut-off point of 56, where lower scores indicate the presence of PD" (Psychological Distress). Now you see the cut-off is 56 and not 52 as previously reported and you might ask why ?
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
6/24 In 2014 colleagues published a paper using MHI-5 from the 2010 National Health Barometer Data (nb did my PhD on 2005 CIDI-SF data) pointing to 2003 European report for MHI-5 (NB often report are published in French before being allowed to write&submit scientific papers) doi.org/10.1186/1471...
doi.org
Psychological distress in French college students: demographic, economic and social stressors. Results from the 2010 National Health Barometer - BMC Public Health
Background Psychological distress (PD) in students is under-investigated, since its prevalence can be high in certain subgroups of students and it has been seen to be associated with other mental health issues and academic achievement. In a sample of French college students, this study investigated factors associated with PD, and looked more closely at the impact of social and interpersonal variables. Methods Data were extracted from the 2010 French “National Health Barometer”. 946 students were interviewed. Mental health was assessed using the MH-5 five-item scale. Results The PD rate in this sample was 13.8% (7.2% in males, 19.5% in females). Low income, nonsexual assault in the last 12 months, studying law and low social participation were associated with PD in multivariate analyses. Conclusions French students show specific characteristics that are discussed in order to explain the relatively low rate of PD observed. The impact of loneliness and social isolation are a major focus for preventive policies based on community resources and early detection of the symptoms of PD.
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
5/24 So "psychological distress" is defined by crossing the threshold of 52 sum score on the MHI-5. I know you'll ask why 52 ? I think the answer is close to the one Cassidy gave for his 6 out of 10 symptoms for depression ;) but as you know, one needs a threshold to get a binary yes or no outcome
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
4/24 This is where things "get interesting" (hang on you'll see a bit a Schmeasurement there ;) In this report you can read p7 : “In the following, estimates of the occurrence (%) of mental health problems in terms of a sum score of 52 or less using the MHI-5 of the SF-36 are reported"
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
3/24 And for the MHI-5 it came from The Mental Health Status of the European Population a 2003 report commissioned by the European Commission but written by a cross-national consortium of market research agencies, as part of the 2002 Eurobarometer survey ec.europa.eu/health/ph_de...
ec.europa.eu
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
2/24 Also In 2005 the National Health Barometer used the CIDI-SF as a measure of depression (last 12 month) inspired by the ESEMED sudy (pubmed.ncbi.nlm.nih.gov/12459795/)
pubmed.ncbi.nlm.nih.gov
The European Study of the Epidemiology of Mental Disorders (ESEMeD/MHEDEA 2000) project: rationale and methods - PubMed
The European Study of the Epidemiology of Mental Disorders (ESEMeD/MHEDEA 2000) is a new cross-sectional study investigating the prevalence and the associated factors of mental disorders, as well as t...
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Yannick Morvan @ymorvan.bsky.social · 23/06/2026
1/24 Hi @eikofried.bsky.social sorry for the late/long response. We have experienced MHI-5 with National Health Barometer and National Student Survey. It was first introduced in 2005 National Health Barometer Survey to measure psychological distress (last month).
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Reposted by Yannick Morvan
Eiko Fried @eikofried.bsky.social · 21/06/2026
What a wonderful study highlighting the value of studying dynamic topics using ... dynamic data.
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Reposted by Yannick Morvan
Omid V. Ebrahimi @omidvebrahimi.bsky.social · 04/06/2026
🌟 Out in Clinical Psychology Review after years in the making: Pleased to share the 1st meta-analytic network analysis (MAGNA) investigating core maintaining features of anxiety symptoms pooling 156 networks (N = 303,151). w/Belli, Tichelaar, @sachaepskamp.bsky.social & @cycology.bsky.social 🧵:
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simine vazire @simine.com · 29/05/2026
Psychology researchers: Got questions about what kinds of submissions we’re looking for at Psych Science (the journal)? (Short answer: empirical research in any area of psychology!) If you’re at #APS26BCN, stop by the APS booth in the exhibit hall between 4-5pm today to chat with me!
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Yannick Morvan @ymorvan.bsky.social · 29/05/2026
If you want to know more about how fish relates to the talk please see his paper : Fried (2026). Mental Disorders as Homeostatic Property Clusters — A Narrative Review. Jama Psychiatry on his website : eiko-fried.com/publications/
eiko-fried.com
Publications » Eiko Fried
These are the scientific publications of Associate Professor Dr Eiko Fried at Leiden University, including manuscripts and book chapters.
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Yannick Morvan @ymorvan.bsky.social · 29/05/2026
And I cannot point enough how great the speakers were this morning, another picture to share from @eikofried.bsky.social
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Yannick Morvan @ymorvan.bsky.social · 29/05/2026
What a great way to start the day #APS2026BCN
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Yannick Morvan @ymorvan.bsky.social · 28/05/2026
A beautiful day to start with Bayesian estimators in intensive longitudinal models this morning and network models for risk and resilience this afternoon #APS26BCN
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Alex Fornito @alexfornito.bsky.social · 11/05/2026
Working with ABCD data? Been using the CBCL? Check our latest out now led by K Pavlovich with T Constable & J Tiego. Diving deep into the psychometric properties of the CBCL, we find that widely assumed latent structures are not valid in the ABCD sample. onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Assessing the Psychometric Properties of the Child Behaviour Checklist in the ABCD Study
The Child Behaviour Checklist (CBCL) is a widely used measure of psychopathology in developmental research and serves as the primary measure in the landmark Adolescent Brain Cognitive Development st...
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The Dissenter @thedissenteryt.bsky.social · 17/05/2026
In episode 1235, I talk with Dr. Nicole Rust about her fascinating book, Why Neuroscience Hasn’t Solved Brain Disorders―and How We Can Change That. #Neuroscience #Science youtu.be/TwU1w2uzclA
youtu.be
#1235 Nicole Rust: Why Neuroscience Hasn’t Solved Brain Disorders―and How We Can Change That
YouTube video by The Dissenter
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Kevin Mitchell @wiringthebrain.bsky.social · 17/05/2026
World models in natural and artificial intelligence royalsocietypublishing.org/rsta/issue/3... - super interesting and very timely collection of articles on what it means to understand the world...
royalsocietypublishing.org
Volume 384 Issue 2320 | Philosophical Transactions of the Royal Society A | The Royal Society
Influential themed journal issues across the physical mathematical and engineering sciences.
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Julien Gossa @juliengossa.cpesr.fr · 17/05/2026
Incroyable travail de montage qui rend mes bafouillements comestibles, grâce notamment aux formidables directions données par @alinevanso.bsky.social Bref, si vous voulez un podcast d'une heure sur ce que je pense être la crise de notre #ESR, c'est là. (idéal pour faire le ménage ou la cuisine)
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Jonathan Repple @jonathanrepple.bsky.social · 17/05/2026
New paper in Nature Mental Health: www.nature.com/articles/s44... After decades of seeing limited progress in depression research despite enormous scientific effort, we started asking a more fundamental question:
nature.com
Key challenges in advancing research on depression phenotyping - Nature Mental Health
In this Review the authors discuss the reasons behind the limited advance in depression phenotyping and provide strategic points for addressing this gap.
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Eiko Fried @eikofried.bsky.social · 09/05/2026
Wimsatt: Perhaps, just perhaps, the best explanation of a phenomenon at a given level is to be found at the same level. Kendler: Noone would seek to explain hypertension at the level of quarks. A few of my favourite papers on this topic of absurd biological reductionism: 🧵
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Eiko Fried @eikofried.bsky.social · 12/05/2026
New paper showing insufficient evidence for neuroimaging features to define reproducible, biologically valid, & clinically meaningful schizophrenia subtypes. The subtypes identified to date likely reflect continuous variation within the disorder rather than discrete, biologically distinct entities.
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Eiko Fried @eikofried.bsky.social · 12/05/2026
Cool work by Josip, Jasmina, @bringmannlaura.bsky.social & @domimaciejewski.bsky.social in which uni students were unable to identify their own estimated EMA networks above chance level. Looking forward to seeing whether this replicates in people w mental health problems! osf.io/preprints/ps...
osf.io
OSF
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Miri Forbes @miriforbes.bsky.social · 12/05/2026
Turns out empirically derived phenotypes (data-driven symptom sets) nested within traditional mental disorders can help reduce diagnostic heterogeneity! We learned so much cool and interesting stuff in this study. I could talk (/post) about it all day, but here’s a few highlights (🧵)
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Omid V. Ebrahimi @omidvebrahimi.bsky.social · 10/04/2026
Our new article on socioeconomic disadvantage, mental distress & functional impairment is out #OpenAccess in American Psychologist. Led by the brilliant @emkbridger.bsky.social, with J. Maltby, @eikofried.bsky.social, co-supervised by me & @ludvigdb.bsky.social. 🧵 psycnet.apa.org/fulltext/202...
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Paul Smaldino @psmaldino.bsky.social · 02/04/2026
I've been thinking a lot about the foundations of cultural evolutionary theory. While there's been a lot of work on transmission mechanisms, there has been far less work on cultural *selection*. Here's a new working paper presenting a taxonomy of cultural selection processes. osf.io/preprints/so...
Title page for working paper: "The Varieties of Cultural Selection"
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Dominique Maciejewski 🟥 @domimaciejewski.bsky.social · 24/03/2026
@eeskevanroekel.bsky.social @charlottev.bsky.social & myself are recruiting a PhD student on momentary emotion beliefs and well-being in adolescents (includes ESM & qualitative methods). Position requires Dutch (for data collection). Happy to answer questions! 👉 Apply: tiu.nu/23638 (27 april 2026)
tiu.nu
PhD kandidaat Emotie overtuigingen en emotie regulatie bij jongeren (23638)
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Eiko Fried @eikofried.bsky.social · 19/03/2026
3 new studies on using psychedelics as treatments for mental disorders just came out; 2 in JAMA Psychiatry, 1 in Lancet Psychiatry. I reviewed one of these submissions. Here are the core results. 🧵
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Tom Rodebaugh @drrodebaugh.bsky.social · 06/03/2026
Contribute to open science! Collabra: Psychology needs a new senior editor for the clinical section as well as several new associate editors for the social section. If you are interested, please fill out the application form before 30 April 2026. Repost please! forms.gle/DgM3484SuLVD...
forms.gle
Application Form Senior Editor Clinical/Associate Editor Social Section Collabra: Psychology
Starting from 1 July 2026, Collabra: Psychology is on the look-out for a new senior editor for the clinical section as well as several new associate editors for the social section. If you are interest...
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Eiko Fried @eikofried.bsky.social · 27/02/2026
Great new paper led by @bringmannlaura.bsky.social, highlight the need to collect qualitative data in ESM / EMA research. #PsychSciSky 🧪 www.nature.com/articles/s44...
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Caspar van Lissa 🟥 @cjvanlissa.bsky.social · 20/02/2026
Call for Submissions for the Theory Methods Conference 2026, September 30-October 2! theorymethodssociety.org/conference.h... We invite you to: 1) Submit your proposal: edu.nl/mj9x6 2) Invite your colleagues/lab/(PhD) students, and encourage them to submit 3) Share this post
theorymethodssociety.org
Conference –
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