Mathias Harrer
@mathiasharrer.bsky.social
🎓 Researcher @ TU Munich & VU Amsterdam
🔍 Meta-Analysis, Statistical Software, Mental Health Research
🧑🏻💻 Maintainer: {dmetar}, {metapsyData}, {metapsyTools} in #rstats
🌎 mharrer.dev | metapsy.org
🦣 fediscience.org/@mathiasharrer
🔍 Meta-Analysis, Statistical Software, Mental Health Research
🧑🏻💻 Maintainer: {dmetar}, {metapsyData}, {metapsyTools} in #rstats
🌎 mharrer.dev | metapsy.org
🦣 fediscience.org/@mathiasharrer
Reposted by Mathias Harrer
No innovation in the treatment of depression will be a ’silver bullet’ that will dramatically change the outcomes. Only together can innovations really improve outcomes. Read our new paper in the Br J Psychiatry. With @mathiasharrer.bsky.social and @toshi-frkw.bsky.social
doi.org/10.1192/bjp....
doi.org/10.1192/bjp....
Assessing the strength of innovations in the treatment of depression | The British Journal of Psychiatry | Cambridge Core
Assessing the strength of innovations in the treatment of depression
doi.org
May 21, 2025 at 11:08 AM
No innovation in the treatment of depression will be a ’silver bullet’ that will dramatically change the outcomes. Only together can innovations really improve outcomes. Read our new paper in the Br J Psychiatry. With @mathiasharrer.bsky.social and @toshi-frkw.bsky.social
doi.org/10.1192/bjp....
doi.org/10.1192/bjp....
Reposted by Mathias Harrer
Psychological internet interventions are effective in people suffering from depressive symptoms who do not meet criteria for depression yet. Particularly for those with at least moderate symptom severity @mathiasharrer.bsky.social @toshi-frkw.bsky.social
bit.ly/4kcYMxS
bit.ly/4kcYMxS
May 14, 2025 at 2:30 PM
Psychological internet interventions are effective in people suffering from depressive symptoms who do not meet criteria for depression yet. Particularly for those with at least moderate symptom severity @mathiasharrer.bsky.social @toshi-frkw.bsky.social
bit.ly/4kcYMxS
bit.ly/4kcYMxS
Reposted by Mathias Harrer
Our new network meta-analysis of treatment formats in CBT for eating disorders found no significant difference between individual, group, guided self-help and unguided self, and all were effective. With @mathiasharrer.bsky.social, @claramiguel.bsky.social and others
doi.org/10.1080/1650...
doi.org/10.1080/1650...
Delivery formats of cognitive behavior therapy in adults with eating disorders: a network meta-analysis
Although CBT has been found to be effective in the treatment of eating disorders, it is not clear if there are differences between treatment formats. We conducted a network meta-analysis (NMA) of r...
doi.org
April 29, 2025 at 6:59 PM
Our new network meta-analysis of treatment formats in CBT for eating disorders found no significant difference between individual, group, guided self-help and unguided self, and all were effective. With @mathiasharrer.bsky.social, @claramiguel.bsky.social and others
doi.org/10.1080/1650...
doi.org/10.1080/1650...
Reposted by Mathias Harrer
Published today in Nature Medicine. In one of the world’s largest RCTs of its kind (n=3,936), a smartphone app teaching 5 key cognitive-behavioral therapy skills improved subthreshold depression—and the effects lasted 6 months.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Cognitive behavioral therapy skills via a smartphone app for subthreshold depression among adults in the community: the RESiLIENT randomized controlled trial - Nature Medicine
A trial that used a master randomized design found that the skills commonly found in smartphone-based cognitive behavioral therapy, when tested alone or in combination with behavioral activation, were...
www.nature.com
April 23, 2025 at 10:01 AM
Published today in Nature Medicine. In one of the world’s largest RCTs of its kind (n=3,936), a smartphone app teaching 5 key cognitive-behavioral therapy skills improved subthreshold depression—and the effects lasted 6 months.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Reposted by Mathias Harrer
Pim Cuijpers and the team has published a comprehensive meta-analysis of CBT for 12 mental disorders, from psychosis to depression to specific phobia. jamanetwork.com/journals/jam...
@pimcuijpers.bsky.social @mathiasharrer.bsky.social @claramiguel.bsky.social
@pimcuijpers.bsky.social @mathiasharrer.bsky.social @claramiguel.bsky.social
Cognitive Behavior Therapy for Mental Disorders in Adults
This unified series of meta-analyses examines the effect sizes of cognitive behavior therapy for many mental and eating disorders on symptoms of the respective disorders using uniform methodologies fo...
jamanetwork.com
April 21, 2025 at 3:19 AM
Pim Cuijpers and the team has published a comprehensive meta-analysis of CBT for 12 mental disorders, from psychosis to depression to specific phobia. jamanetwork.com/journals/jam...
@pimcuijpers.bsky.social @mathiasharrer.bsky.social @claramiguel.bsky.social
@pimcuijpers.bsky.social @mathiasharrer.bsky.social @claramiguel.bsky.social
Reposted by Mathias Harrer
Today our new unified series of meta-analyses of CBT for 11 mental disorders was published in JAMA Psychiatry. Another nice example of a 'next level' meta-analysis of the Metapsy initiative. With @mathiasharrer.bsky.social, @claramiguel.bsky.social, and many others
jamanetwork.com/journals/jam...
jamanetwork.com/journals/jam...
Cognitive Behavior Therapy for Mental Disorders in Adults
This unified series of meta-analyses examines the effect sizes of cognitive behavior therapy for many mental and eating disorders on symptoms of the respective disorders using uniform methodologies fo...
jamanetwork.com
April 16, 2025 at 6:21 PM
Today our new unified series of meta-analyses of CBT for 11 mental disorders was published in JAMA Psychiatry. Another nice example of a 'next level' meta-analysis of the Metapsy initiative. With @mathiasharrer.bsky.social, @claramiguel.bsky.social, and many others
jamanetwork.com/journals/jam...
jamanetwork.com/journals/jam...
Reposted by Mathias Harrer
Our new paper on self-reports vs clinician ratings of efficacies of psychotherapies for depression can be read open-access in Epidemiology and Psychiatric Sciences!
Here is a short summary of our findings🧵
www.cambridge.org/core/journal...
Here is a short summary of our findings🧵
www.cambridge.org/core/journal...
Self-reports vs clinician ratings of efficacies of psychotherapies for depression: a meta-analysis of randomized trials | Epidemiology and Psychiatric Sciences | Cambridge Core
Self-reports vs clinician ratings of efficacies of psychotherapies for depression: a meta-analysis of randomized trials - Volume 34
www.cambridge.org
March 13, 2025 at 8:20 PM
Our new paper on self-reports vs clinician ratings of efficacies of psychotherapies for depression can be read open-access in Epidemiology and Psychiatric Sciences!
Here is a short summary of our findings🧵
www.cambridge.org/core/journal...
Here is a short summary of our findings🧵
www.cambridge.org/core/journal...
Reposted by Mathias Harrer
One could say that the research field on prevention of depression is stuck. Interested in this field and in solutions how to continue? Read my new open access paper in Current Directions in Psychological Science
doi.org/10.1177/0963...
doi.org/10.1177/0963...
Sage Journals: Discover world-class research
Subscription and open access journals from Sage, the world's leading independent academic publisher.
doi.org
December 4, 2024 at 3:39 PM
One could say that the research field on prevention of depression is stuck. Interested in this field and in solutions how to continue? Read my new open access paper in Current Directions in Psychological Science
doi.org/10.1177/0963...
doi.org/10.1177/0963...
Reposted by Mathias Harrer
Starting my job search: I just finished my PhD in Clinical Psychology and am looking for opportunities to make an impact.
I have expertise in meta-analyses, advanced stats, psychometrics, R, and project management.
If you know of a position that might be a great fit, please feel free to reach out.
I have expertise in meta-analyses, advanced stats, psychometrics, R, and project management.
If you know of a position that might be a great fit, please feel free to reach out.
Constantin Yves Plessen
constantinyvesplessen.com
December 3, 2024 at 9:55 AM
Starting my job search: I just finished my PhD in Clinical Psychology and am looking for opportunities to make an impact.
I have expertise in meta-analyses, advanced stats, psychometrics, R, and project management.
If you know of a position that might be a great fit, please feel free to reach out.
I have expertise in meta-analyses, advanced stats, psychometrics, R, and project management.
If you know of a position that might be a great fit, please feel free to reach out.
Just wanted to let everyone know that the one and only Pim Cuijpers and Toshi Furukawa are now on Bluesky as well! :)
@pimcuijpers.bsky.social
@toshi-frkw.bsky.social
#PsychSciSky #psychiatry #statssky #psychsky
@pimcuijpers.bsky.social
@toshi-frkw.bsky.social
#PsychSciSky #psychiatry #statssky #psychsky
November 22, 2024 at 1:23 PM
Just wanted to let everyone know that the one and only Pim Cuijpers and Toshi Furukawa are now on Bluesky as well! :)
@pimcuijpers.bsky.social
@toshi-frkw.bsky.social
#PsychSciSky #psychiatry #statssky #psychsky
@pimcuijpers.bsky.social
@toshi-frkw.bsky.social
#PsychSciSky #psychiatry #statssky #psychsky
Reposted by Mathias Harrer
In "What if we wait? Using synthetic waiting lists to estimate treatment effects in routine outcome data", we demonstrated how to estimate putative between-group effects from data sets with only within-subjects measurements. Basically a g-estimation approach.
www.tandfonline.com/doi/full/10....
www.tandfonline.com/doi/full/10....
What if we wait? Using synthetic waiting lists to estimate treatment effects in routine outcome data
Objective: Due to the lack of randomization, pre–post routine outcome data precludes causal conclusions. We propose the “synthetic waiting list” (SWL) control group to overcome this limitation.Meth...
www.tandfonline.com
November 21, 2024 at 11:18 AM
In "What if we wait? Using synthetic waiting lists to estimate treatment effects in routine outcome data", we demonstrated how to estimate putative between-group effects from data sets with only within-subjects measurements. Basically a g-estimation approach.
www.tandfonline.com/doi/full/10....
www.tandfonline.com/doi/full/10....
Reposted by Mathias Harrer
Question for my #EvidenceSynthesis #MetaAnalysis #SystematicReview folks:
I'm organizing the 2025 meeting of the Society for Research Synthesis Methods (www.srsm.org). Currently working on the call for submissions, which it has me dreaming about sessions I would love to see at the conference....
I'm organizing the 2025 meeting of the Society for Research Synthesis Methods (www.srsm.org). Currently working on the call for submissions, which it has me dreaming about sessions I would love to see at the conference....
Society for Research Synthesis Methodology
The Society for Research Synthesis Methodology (SRSM) is an organization of scholars and practitioners interested in the development and application of research synthesis methodology. This website ser...
www.srsm.org
November 20, 2024 at 9:51 PM
Question for my #EvidenceSynthesis #MetaAnalysis #SystematicReview folks:
I'm organizing the 2025 meeting of the Society for Research Synthesis Methods (www.srsm.org). Currently working on the call for submissions, which it has me dreaming about sessions I would love to see at the conference....
I'm organizing the 2025 meeting of the Society for Research Synthesis Methods (www.srsm.org). Currently working on the call for submissions, which it has me dreaming about sessions I would love to see at the conference....
Read our new article just published in The Lancet Psychiatry.
Thanks to everyone involved in the IPD-PrevDep Consortium \w Claudia Buntrock, @pimcuijpers.bsky.social, @toshi-frkw.bsky.social, and so many more.
Thanks to everyone involved in the IPD-PrevDep Consortium \w Claudia Buntrock, @pimcuijpers.bsky.social, @toshi-frkw.bsky.social, and so many more.
Depression is preventable. Our individual participant data meta-analysis based on >7000 participants proved that psychological interventions reduce the incidence of depression within a year from 10% to 6%. authors.elsevier.com/sd/article/S...
ScienceDirect.com | Science, health and medical journals, full text articles and books.
authors.elsevier.com
November 20, 2024 at 8:15 AM
Read our new article just published in The Lancet Psychiatry.
Thanks to everyone involved in the IPD-PrevDep Consortium \w Claudia Buntrock, @pimcuijpers.bsky.social, @toshi-frkw.bsky.social, and so many more.
Thanks to everyone involved in the IPD-PrevDep Consortium \w Claudia Buntrock, @pimcuijpers.bsky.social, @toshi-frkw.bsky.social, and so many more.
Reposted by Mathias Harrer
Okay made a starter pack for folks into evidence synthesis, systematic review, meta-analysis. I've surely missed people, so please ping with suggestions or self-nominations.
go.bsky.app/JLw77VZ
go.bsky.app/JLw77VZ
November 13, 2024 at 10:23 PM
Okay made a starter pack for folks into evidence synthesis, systematic review, meta-analysis. I've surely missed people, so please ping with suggestions or self-nominations.
go.bsky.app/JLw77VZ
go.bsky.app/JLw77VZ
Digital interventions are attractive to increase treatment uptake in depression, but we also need to know who requires other forms of care.
Here, we use meta-analytic predictive models to derive a precision treatment rule for digital stress interventions in Px with depression. bit.ly/3S9V6Sq
Here, we use meta-analytic predictive models to derive a precision treatment rule for digital stress interventions in Px with depression. bit.ly/3S9V6Sq
January 10, 2024 at 9:15 AM
Digital interventions are attractive to increase treatment uptake in depression, but we also need to know who requires other forms of care.
Here, we use meta-analytic predictive models to derive a precision treatment rule for digital stress interventions in Px with depression. bit.ly/3S9V6Sq
Here, we use meta-analytic predictive models to derive a precision treatment rule for digital stress interventions in Px with depression. bit.ly/3S9V6Sq
A highly relevant insight, especially for psychotherapy trialists 👇
Sometimes forming clusters as an immediate consequence of individual randomisation is the same as randomising pre-existing clusters.
tpmorris.substack.com/p/cluster-ra...
tpmorris.substack.com/p/cluster-ra...
December 21, 2023 at 8:43 PM
A highly relevant insight, especially for psychotherapy trialists 👇
New paper on five decades of depression psychotherapy research in the American Psychologist (led by Pim Cuijpers): doi.org/10.1037/amp0...
We found CBT is not only by far the best-examined therapy, but that the share of CBT among all published trials is increasing with every year.
We found CBT is not only by far the best-examined therapy, but that the share of CBT among all published trials is increasing with every year.
November 18, 2023 at 11:37 AM
New paper on five decades of depression psychotherapy research in the American Psychologist (led by Pim Cuijpers): doi.org/10.1037/amp0...
We found CBT is not only by far the best-examined therapy, but that the share of CBT among all published trials is increasing with every year.
We found CBT is not only by far the best-examined therapy, but that the share of CBT among all published trials is increasing with every year.
"For in psychology, there are experimental methods and conceptual confusion. The experimental method makes us think we have the means of getting rid of the problems which trouble us; but problem and method pass one another by."
Great paper on W.'s mysterious remark: jhaponline.org/jhap/article...
Great paper on W.'s mysterious remark: jhaponline.org/jhap/article...
“A misleading parallel”: Wittgenstein on Conceptual Confusion in Psychology and the Semantics...
jhaponline.org
November 7, 2023 at 9:35 AM
"For in psychology, there are experimental methods and conceptual confusion. The experimental method makes us think we have the means of getting rid of the problems which trouble us; but problem and method pass one another by."
Great paper on W.'s mysterious remark: jhaponline.org/jhap/article...
Great paper on W.'s mysterious remark: jhaponline.org/jhap/article...
Belated Halloween greetings from your friend trained in biostatistics.
November 3, 2023 at 7:15 PM
Belated Halloween greetings from your friend trained in biostatistics.
Reposted by Mathias Harrer
Very nice! @mathiasharrer.bsky.social et al.'s metapsy now has a data base of PTSD studies: www.metapsy.org/database/ptsd
November 2, 2023 at 4:41 PM
Very nice! @mathiasharrer.bsky.social et al.'s metapsy now has a data base of PTSD studies: www.metapsy.org/database/ptsd