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Sanjay Srivastava Profile picture
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Mar 10, 2019 • 4 tweets • 2 min read
This is your semi regular reminder that among players who have been admitted to the NBA, height has no association with basketball performance
And that’s not even getting into the validity issues with the criterion variables
P.S. I don’t have a SoundCloud, instead let me promote this meta-analysis by Kuncel et al. psycnet.apa.org/record/2001-16…
P.P.S. Turns out this was apparently an analysis of 32 students, a sample size that is closer to "no study at all" than to "informative"

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More from @hardsci

Sanjay Srivastava Profile picture
Feb 8
I wish I was more surprised. There is a loophole in FERPA that allows universities to access students' private therapy records for the purpose of defending themselves in court. There was a notorious case at my university involving this with a rape survivor oregonlive.com/education/2015…
Oregon banned it after that incident came out. But AFAIK it is still permitted at a federal level oregonlive.com/education/2015…
Thanks to activists, Oregon's confidentiality protections for students who talk to campus counselors about domestic violence, sexual assault, and stalking are now some of the strongest. They need to be replicated (or made even stronger) nationwide so they protect everyone
Read 6 tweets
Sanjay Srivastava Profile picture
Jul 22, 2021
And now a thread of things that must be true in order to validly interpret a standard mediation analysis.

These are assumptions you must defend with outside knowledge. They are not tested as part of the analysis, and often they are not testable even in principle.

Here goes...
1. The effect of M on X is exactly zero
2. The effect of Y on M is exactly zero
Read 12 tweets
Sanjay Srivastava Profile picture
Jul 21, 2021
If psychologists had to present and defend a DAG every time they did a mediation analysis, 10% of them would result in "sorry the effect we care about isn't identified" and the other 90% would be "sorry we don't understand this phenomenon well enough to draw a DAG"
(Apparently today is "be salty about mediation" day in my brain)
Real talk though, I think mediation analysis can sometimes be useful if it comes with a thorough, eyes-open discussion of all the things that must be true for it to be interpretable as mediation
Read 4 tweets
Sanjay Srivastava Profile picture
Apr 7, 2021
Hey psychology twitter. The journalist Jesse Singal is probably going to be showing up on your radar because he has a new book about social psychology. He has also written about trans people. I want to encourage you to read what trans people have said about that work
There is a lot of stuff out there and it can feel a little overwhelming. Here is one place to start, a collection of links to critiques of a very influential 2018 Atlantic article he wrote patreon.com/posts/19542136
This tweet and the thread it is a part of encapsulate some of what really sunk in the most to me about the criticism
Read 10 tweets
Sanjay Srivastava Profile picture
Jan 28, 2021
NOT SWEENEY
NOT SWEENEY TODD
THE DEMON BARBER OF FLEET
Read 7 tweets
Sanjay Srivastava Profile picture
Jan 27, 2021
Is who you follow on Twitter correlated with your mental health? Using machine learning, we find that the high-degree accounts that people follow - celebrities, public figures, etc. - can predict anxiety, depression, post-traumatic stress, & anger (out-of-sample R = .2)
Substantive upshot: A user's Twitter experience - what they see in their feed - is heavily affected by their decisions of who to follow. Those curation decisions, in the aggregate, are associated with mental health
Some notes and points of interest:

1. "Predict" is used in the machine-learning sense, think of this as a correlation - causality wasn't tested

2. The size of the correlation is neither huge nor neglible. We don't think it can be dismissed but it shouldn't be exaggerated either
Read 6 tweets

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