iiinova — where your digital self keeps evolving

John Felt @jfeltphd.bsky.social · 31/03/2026

I’ve now realized that LLMs are to statisticians what WebMD is to physicians.

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John Felt @jfeltphd.bsky.social · 26/03/2026

There’s a lot of good stuff like this from Sarah Depaoli, @winterstat.bsky.social and Rens van de Schoot

John Felt @jfeltphd.bsky.social · 26/03/2026

Here’s a really good paper on the topic my grad advisor is on: www.tandfonline.com/doi/abs/10.1...

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John Felt @jfeltphd.bsky.social · 24/03/2026

It really was. I was amazed that Clarke created just as huge of a world in Piranesi while using only a fraction of the pages of Jonathon Strange

John Felt @jfeltphd.bsky.social · 24/03/2026

Clarke is one of my favorites authors. I recently read both Piranesi and Jonathon Strange & Mr Norrell with my kid

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John Felt @jfeltphd.bsky.social · 16/03/2026

In Sacramento, we would go to the nimbus fish hatchery during salmon season, the jelly belly factory, maidu museum, sutter’s fort, sutter’s mill, and sly park

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John Felt @jfeltphd.bsky.social · 20/02/2026

I’ve found it particularly enlightening, and maybe disheartening, that you can specify a CFA to give you the sample mea and provide fit indices for it…

John Felt @jfeltphd.bsky.social · 11/02/2026

I recently spent some time explaining INUS conditions to social and medical scientists to try to dispel this.

John Felt @jfeltphd.bsky.social · 04/12/2025

Great write up of a really cool loneliness study from @kvanbogart.bsky.social

John Felt @jfeltphd.bsky.social · 02/12/2025

He’s sleepin’ on my couch

John Felt @jfeltphd.bsky.social · 26/11/2025

Some recent shots of me presenting work on how bidirectional associations between loneliness and cognitive performance change over time using Bayesian estimation at the @geronsociety.bsky.social for the Center for Healthy Aging @pennstateuniv.bsky.social

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John Felt @jfeltphd.bsky.social · 07/11/2025

Super cool new study by @kvanbogart.bsky.social looking into differences between chronic and acute loneliness!

John Felt @jfeltphd.bsky.social · 09/10/2025

I think the issue is that we can’t know if it’ll give the same results, in our specific use case, until after doing all that work, which also sucks.

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John Felt @jfeltphd.bsky.social · 01/10/2025

I remember the tabachnick and fidell book “experimental designs using ANOVA” that I used in my MA program being super helpful, but it’s been a while since I looked at it.

John Felt @jfeltphd.bsky.social · 08/08/2025

I learned in grad school to not rely on p-curve analyses from Will shadish and Jack Vevea. I was surprised to see them used so frequently after I graduated, but I could never find a paper backing up what I was taught until now!

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John Felt @jfeltphd.bsky.social · 31/07/2025

Oh I see! Then I also agree lol

John Felt @jfeltphd.bsky.social · 31/07/2025

Which is why the causal inference we work with is probabilistic and not deterministic

John Felt @jfeltphd.bsky.social · 31/07/2025

I’m with @solomonkurz.bsky.social . Is this how the field is looking at causal inference? The causal inference class I took in grad school and the ones I teach focus on how we typically only have INUS conditions.

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John Felt @jfeltphd.bsky.social · 26/07/2025

Take a look at our new pre print for different approach on how to calculate the dynamic range of diurnal cortisol, led by the talented @kvanbogart.bsky.social

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John Felt @jfeltphd.bsky.social · 23/07/2025

All this! I just did a causal inference workshop at Penn State and I started off with “stats can’t save you here. Causal inference is a qualitative inference given the data collected and the design of your study.” It was very Shadish, Cook, and Campbell heavy with a dash of DAGs

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John Felt @jfeltphd.bsky.social · 19/07/2025

This book was so good! Have you read jonathan strange and mr norrell yet?

John Felt @jfeltphd.bsky.social · 02/07/2025

The tabachnick and Fidell book, analyzing experiments using ANOVA. has a nice section on a priori contrast for one way and factorial ANOVAs. They even include a table at the end for different contrast based on the number of groups you have. Linda collins MOST book is a good one too

John Felt @jfeltphd.bsky.social · 23/06/2025

If MCAR, I’ll just randomly impute 1s and 0s so I don’t lose power

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Reposted by John Felt

Alexandria Ocasio-Cortez @aoc.bsky.social · 11/06/2025

I will be damned if I allow a bunch of Confederate-waving January 6th apologists give the American people a lecture on flag waving. There is ZERO reason to enter an argument about patriotism with people who still worship traitors to America 150+ years later. They. Are. Breaking. The. Law.

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John Felt @jfeltphd.bsky.social · 19/05/2025

Oh absolutely. Unfortunately it means you’ll have to double check these errors in lme4 before determining if they are erroneous though

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John Felt @jfeltphd.bsky.social · 18/05/2025

Another thing to request, particularly when using lme4 or nlme in R, is the confidence intervals. If you just do a summary on the model object, you won’t actually know if your model has converged, particularly in the random effects. Asking for confint (in lme4) or intervals(in nlme) will check this

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John Felt @jfeltphd.bsky.social · 20/04/2025

As a Sacramento kings fan, I am a fan of anyone that is a thorn in the Lakers side. Go Celtics!

Penn State Clinical and Translational Science Institute @pennstatectsi.bsky.social · 18/04/2025

Reposted by John Felt

📅 Save the date – May 14 @ 1:30 p.m.! Join us for our BERD Workshop Webinar: “Causal Inferences for Experimental and Quasi-Experimental Designs” |✅ Reserve your spot: bit.ly/4jB2EIU

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Reposted by John Felt

Biopsychosocial Science and Medicine (new name!) @bsamjournal.bsky.social · 09/01/2025

You can follow along with members of our Early Career Editorial Board through this starter pack: go.bsky.app/7wdxZUn

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John Felt @jfeltphd.bsky.social · 08/04/2025

Have you been telling participants to “git gud” in your studies?

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John Felt @jfeltphd.bsky.social · 08/04/2025

Wow, this is an impressive three to have in one talk!

John Felt @jfeltphd.bsky.social · 24/03/2025

I once heard someone say that “they didn’t need to randomize because the data were all collected so close in time to each other”

John Felt @jfeltphd.bsky.social · 03/03/2025

Check out this new one from JAMA Pediatrics that I did the analyses for jamanetwork.com/journals/jam... We used Synthetic Control Method to evaluate the effectiveness of a coordinated county-level child sexual abuse prevention intervention program

jamanetwork.com

Rates of Population-Level Child Sexual Abuse After a Community-Wide Preventive Intervention

This study tests whether a coordinated, community-wide preventive intervention could significantly reduce population-level incidence rates of child sexual abuse.

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John Felt @jfeltphd.bsky.social · 28/02/2025

Definitely this paper. It is written so clearly without a lot (or any equations). It helped me also see that the whole DAGs framework also fits with the threats to validity and the Rubin’s causal framework

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John Felt @jfeltphd.bsky.social · 22/02/2025

That is a really clever poster design

John Felt @jfeltphd.bsky.social · 20/02/2025

I agree with all of this. Outliers are really individuals in your sample that come from a different population than you intended to collect, not necessarily extreme values.

Suzanne Segerstrom @segerstrom.bsky.social · 19/02/2025

Reposted by John Felt

The BSAM @psychosommed.bsky.social Early Career Editorial Board provides a pathway for outstanding early career researchers around the globe to gain experience in reviewing and editorial functions. Apply by April 15. Please share with colleagues and rebleat! journals.lww.com/bsam/Documen...

journals.lww.com

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John Felt @jfeltphd.bsky.social · 19/02/2025

Will shadish had a great paper on this where participants were randomized to choose their condition or to be randomly assigned to condition www.statpower.net/Content/MLRM...

statpower.net

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John Felt @jfeltphd.bsky.social · 10/02/2025

Interesting. I wonder if these findings generalize across methods for establishing childhood adversity? Lots of work on how prospective and objective measures of child maltreatment (to biological measures) are related to different outcomes than retrospective self-report (to psych measures)

Ryan L. Brown @ryanlinnbrown.bsky.social · 31/01/2025

Reposted by John Felt

EMA/Daily Diary researchers! Do you have a dataset with momentary or daily loneliness among adults 18+? @kvanbogart.bsky.social is seeking datasets to support a coordinated data analysis Email Karina.vanbogart@northwestern.edu with a brief description of your dataset to be considered! #psychscisky

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Alexandria Ocasio-Cortez @aoc.bsky.social · 30/01/2025

Yes, this administration is dangerous and cruel, but they are also shockingly dim and incompetent. Opportunities are everywhere. Make everything as hard as possible. Resist every demand. Refuse entry without a warrant. Don’t take the buyout. Their problem solving skills are 📉

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John Felt @jfeltphd.bsky.social · 25/01/2025

That’s a great question. I haven’t seen anything published on that. I only have a single anecdote with an adult male around 59 years old. when I was collecting my dissertation data, the father of one of my RAs wanted to try it and it worked despite him knowing the goal and undergrad confederates

John Felt @jfeltphd.bsky.social · 11/01/2025

Wow, I was not expecting a release from @doseone.bsky.social! This album is a incredible doseone.bandcamp.com/album/all-po...

doseone.bandcamp.com

All Portrait, No Chorus, by doseone & Steel Tipped Dove

14 track album

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John Felt @jfeltphd.bsky.social · 19/12/2024

You can do self-report, housemate/family report, and… voyeur report?

John Felt @jfeltphd.bsky.social · 18/12/2024

Most most may have been too strong of a word for me to use. I’ve never had any issues with articles I’ve published being made available immediately on pmc. The journals have all provided an approved version for articles funded through the nih in my experience.