Constantin Yves Plessen

Psychologist & psychometrician by day @ChariteBerlin.

Meta-analyst by night @VUAmsterdam.

#rstats, #OpenScience, meta-analysis, psychometrics

[Constantin Yves Plessen @CYPlessen]

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.

[Constantin Yves Plessen @CYPlessen]

@OmidVEbrahimi Congratulations on your PhD and the award! From afar, I’ve been impressed by the quality of your work—it’s truly inspiring. I hope you can take some well-deserved time to celebrate this amazing achievement.

[Epidemiology & Psychiatric Sciences @EpiPsychSci]

Across 91 RCTs, self-report instruments did not overestimate the effects of psychotherapy for depression and were generally more conservative than clinician-rated instruments.
link here: https://t.co/J3dlXtuFA1

[Daniël Lakens @lakens]

Two podcast episodes about whether psychology is producing valuable knowledge. The vanilla take by @yorl and @paulbloomatyale. https://t.co/5nS1DDFSQx
The spicy take by @paulrconnor and Rachel Hartman: https://t.co/lUwgWVx7UR

[HilmiBro @Hilmi87Bro]

(1) Check out our new multi-lab study on gender-inclusive language! https://t.co/D9DnSl9MnA

What did we do? We replicated the 20 y/o effect that when people get prompted to name celebrities (e.g., name three politicians), they come up with MORE women, ...

[Micah G. Allen @micahgallen]

Vienna is one of my favorite cities in the world. Would love to hear more about what working in research and academia is like here. The good, the bad, and the ugly?

[Constantin Yves Plessen @CYPlessen]

And the biggest thanks to my colleagues over the years.

Without all of you this would not have been possible or enjoyable!

3/3

[Constantin Yves Plessen @CYPlessen]

PhDone! 🎓

Thrilled to share that I successfully defended my dissertation last week! Immense gratitude to my supervisor Pim Cuijpers (@pimcuijpers) and Eirini Karyotaki (@KaryotakiEirini) for their support and guidance throughout the years!

1/3

[Constantin Yves Plessen @CYPlessen]

I want to thank my committee for the rewarding discussions: Philip Spinhoven, Ellen Driessen (@driessen_ellen), Christiaan Vinkers (@vinkerslab), Eiko Fried (@EikoFried), Wouter van Ballegooijen (@WvBallegooijen), and Wouter den Hollander (@WinningWouter).

2/3

[Ioana A Cristea @IoanaA_Cristea]

@pash22 @dnunan79 @ProfRobHoward @GordonGuyatt @statsepi Also though I don’t want to comment on which is the right analysis, surely we can all agree that a meta-analytic estimate that changes significance if a few events are added is not robust? Maybe we do need a trial?

[Constantin Yves Plessen @CYPlessen]

@lino_wehrheim Danke dir!

[Constantin Yves Plessen @CYPlessen]

🎓 Excited to announce my PhD defense! 🎓

Research synthesis on psychological interventions for mental health.

📅 Wednesday, June 19, 2024
🕚 11:45 am
📍 Auditorium, Main Building, VU Amsterdam
🎥 Live stream: https://t.co/tmscbigkmt
ℹ️ More info: https://t.co/3wNYeRhRTE

1/4

[Constantin Yves Plessen @CYPlessen]

A heartfelt thank you to my supervisors, @pimcuijpers and @KaryotakiEirini, for their invaluable guidance and support.

Special thanks to my collaborators @MiguelClara_, Olga Panagiotopoulou, @MathiasHarrer, and @CiharovaMarketa. Your support made this research possible!

4/4

[Constantin Yves Plessen @CYPlessen]

Influential factors include:

•Publication bias
•Study quality
•Comparison to wait list control groups

3/4

[Ian Hussey @ianhussey]

Interested in meta-science? Come do a PhD with me and @maltoesermalte at @unibe in beautiful Switzerland. Open topic although we focus on error detection (see @error_reviews) and flexibility in measurement & methods. Email or DM either of us for details. Topic ideas welcome!

[Ian Hussey @ianhussey]

I never thought of using multiverse plots to illustrate the results of simulation studies until I saw @cjsewall9 do it in a thread. It's such a good idea!

I adapted Craig's code into a simple generic plotting function & will use them in my lectures in future.

[Ioana A Cristea @IoanaA_Cristea]

Out @TheLancetPsych our paper on assessment of #suicide in trials of psychotherapy for #depression, led by brilliant PhD candidate @MiguelClara_ & Master student J Cecconi, w/ @MathiasHarrer @pimcuijpers @KaryotakiEirini @claudio_gentili @WvBallegooijen
https://t.co/k0te6o6CiU

[Daniël Lakens @lakens]

Today is @nulliusverbapod first birthday! @smreeteemehta and I put out 28 podcast episodes from what should motivate scientists to preregistration. Thanks to all of you for listening! We were wondering: What is your favorite episode? And which topic should we discuss next?

[Eiko Fried @EikoFried]

Did you know of this meta-analytic website by @pimcuijpers et al. featuring hundreds of RCTs?
In the video I'll show researchers (part I) and clients (part II) how to run a systematic meta-analysis looking into the effect of CBT on depression in older adults within 1 minute.