William Costello
williamcostello.bsky.social
William Costello
@williamcostello.bsky.social
PhD student of Evolutionary Psychology at the University of Texas at Austin.
Congrats, Tom! Well deserved!
February 5, 2026 at 3:23 PM
That’s interesting, which ones?
February 5, 2026 at 2:25 PM
Sorry to tell you that evolutionary psychology continues to flourish.

Political psychology, incidentally, is a domain of great evolutionary psychology work (see work from Michael Bang Peterson et al.)

link.springer.com/article/10.1...
The Scientific Revolution of Evolutionary Psychology: Current Status and Future Directions. A Commentary on Zagaria (2024) - Adaptive Human Behavior and Physiology
Objectives: A bibliometric analysis by Zagaria (2024) claimed that research in Evolutionary Psychology (EP) lags behind research grounded in the Standard Social Science Model (SSSM) in prevalence and ...
link.springer.com
February 4, 2026 at 6:44 PM
😂. I'm quite happy that many people in America assume I'm mafia affiliated based on my surname!
February 4, 2026 at 5:13 PM
Thanks, I agree that there’s nothing unique to EP about obstruction.

Also, do you think the flagrant hostility toward evolutionary psychologists might also drive some young scholars away and perhaps cultivate a somewhat defensive mindset among those who stay?
February 4, 2026 at 9:29 AM
Like any field, many terrible studies and bad actors abound.

Glad to hear you don’t count me among them 🫡

You may be blinded by my sheer sex appeal though 😂😜
February 3, 2026 at 9:47 PM
ya maybe.

Could also see Walter et al. (2020) failed replication of the greater importance of physical attractiveness in highly pathogenic environments.

Anyway, stay tuned for more inwardly critical work and pre-registered predictions from our lab coming soon. Thanks again for the review(s) 👍
February 3, 2026 at 7:55 PM
I guess I don't interpret him developing a full competing theory (mate switching) when a hypothesis he originally endorsed (ovulation shifts/dual mating) was falsified as an "uneasy Burgfrieden".

See also his initial chastity mate preference hypothesis being unsupported by his own data.
February 3, 2026 at 7:34 PM
Nitpicking but both items closer to 3/5 means than 2.

I suppose more research could clarify precisely what scholars mean when they endorse the items “evolutionary psychology’s theories are unfalsifiable” & “assumptions are not testable”.
February 3, 2026 at 7:11 PM
Thanks for taking the time to review our paper and other recent work from our lab.

We will try to take your constructive criticism on board going forward.

I will respond to a few points here in this thread.
I reviewed an earlier version of this paper. I think it's interesting, because you can tell by reading it that evolutionary psychology still lacks a loyal opposition and a healthy error culture.
It's a defensive paper, targeted at people who believe evolution stops at the neck, YouTubers, _others_
February 3, 2026 at 6:10 PM
Finally, that evolutionary psychologists are unwilling to challenge our “friends” is demonstrably false.

My supervisor has well documented disagreements with his former student about dual mating V mate switching and Martin Daly about adaptations for murder.

www.sciencedirect.com/science/arti...
The mate switching hypothesis
Leaving one mating relationship and entering another, serial mating, is commonly observed in many cultures. An array of circumstances can prompt a mat…
www.sciencedirect.com
February 3, 2026 at 6:09 PM
It’d have been nice if you raised the @adamrutherford.bsky.social citation concerns in your review. Perhaps you did and we neglected to rectify, the paper was a long time in the works. Many other contemporary examples we could have chosen, but apologies to Rutherford if he feels mischaracterized.
February 3, 2026 at 6:07 PM
I am confused by your seeming to distancing yourself from falsifying a key prediction (ovulation shifts) stemming from the dual mating hypothesis.

Were these not critical tests of that hypothesis?

bsky.app/profile/rube...
They have three examples of falsified hypotheses in EP. I have my problems with all of the examples, including the one where I supposedly helped falsify something. Happy to expand on this, but my main problem is that I thought attacking this straw man was a missed opportunity.
February 3, 2026 at 6:06 PM
Accusations of panadaptationism have been dealt with thoroughly throughout the decades.
pubmed.ncbi.nlm.nih.gov/20141266/

Our lab is from an adaptationist tradition, but we do highlight other evolutionary forces in our paper.
Evolutionary psychology. Controversies, questions, prospects, and limitations - PubMed
Evolutionary psychology has emerged over the past 15 years as a major theoretical perspective, generating an increasing volume of empirical studies and assuming a larger presence within psychological science. At the same time, it has generated critiques and remains controversial among some psycholog …
pubmed.ncbi.nlm.nih.gov
February 3, 2026 at 6:05 PM
Challenging misconceptions is not all evolutionary psychologists do. We publish data in support of pre-registered hypotheses and have work that is much more self-critical of our field. Not all our work can be published all at once. We do discuss some areas for improvement in this already long paper.
February 3, 2026 at 6:04 PM
I think it is misguided to think that evolutionary psychology should just tolerate widespread misconceptions and that the they will be resolved by being more self-critical and having more pre-registration (although these are of course important).

bsky.app/profile/rube...
You know what would actually make EP more trustworthy? Critical self-examination. We need people who accept some of the premises of the field to give incisive scrutiny to their peers and seeing how the authors avoid doing so for their friends, you can see it's not in the field's culture.
February 3, 2026 at 6:00 PM
I don't think our paper is "aimed at YouTubers"

We cited fairly recent empirical data (Jonason & Schmitt, 2016) about academics beliefs about EP’s falsifiability.

We had one line on a popular YouTube video (concerningly championed by some evolutionary social scientists).

bsky.app/profile/will...
Misconceptions pervade academia.

Jonason and Schmitt (2016) found that among academics the mean endorsement for the claims that “evolutionary psychology’s theories are unfalsifiable” was 2.89 & “assumptions are not testable” was 2.91 on a 5-point scale.

link.springer.com/article/10.1...
link.springer.com
February 3, 2026 at 5:59 PM
I'm a graduate student preparing to go on the job market. I care a great deal about the (mis)conceptions about our field that pervade academia and cultural consciousness.

I think challenging this misconception in a broad psych journal is worthwhile.

You are free to disagree.
February 3, 2026 at 5:57 PM
Thanks for this, will respond to a few points in a little while.
February 3, 2026 at 4:41 PM