Ed Hagen Profile picture
May 14, 2021 14 tweets 6 min read Read on X
There is gold in "unpublished" dissertations

According to #evopsych, it's not surprising that male tourists pay for sex with locals. What is surprising, as April Gorry found, is that women do the same. Is #evopsych wrong about women's mating psychology? In some ways, yes:

A 🧵
2. White women tourists visiting the Caribbean and other warm-weather locales are stereotyped as sex-starved nymphomaniacs lusting after sexually potent dark-skinned men. Where did this myth come from?
3. Western tourist women often do enter into sexual relationships with local men in Belize, where Gorry did her fieldwork, and many other resort locations:
4. The men that tourist women choose seem to lack all the qualities, such as financial resources and status, that #evopsych claims they should have. In an apparent reversal of sex roles, tourist women often provide their sexual partners with substantial financial resources:
5. What's going on? Women tourists unfamiliar w/ the local culture don't recognize the men's low status but do notice universal aspects of their mate quality. First, men display cues of competency & mastery of the physical & social environments, which indicate resource potential:
6. Second, the men exhibit powerful cues of investment and devotion:
7. Gorry's female informants describe intense emotional experiences:
8. But in many cases it's a hustle. Local men at the bottom of the economic and ethnic hierarchy learn to feign indicators of romantic love in order to obtain sexual and financial benefits from tourist women:
9. The motivations of the men, however, are not quite so simple:
10. Gorry concludes her dissertation with an analysis of #RomanceNovels. The male heroes are universally portrayed as masters of their physical and social environments...
11. ...and the heroes are obsessed with the heroine.

In ancestral environments, competence and devotion would have been reliable indicators of male mate value, and are probably stronger cues than the evolutionarily novel financial resources often emphasized in #evopsych:
12. If you research sex and mating from an evolutionary perspective, check it out.
13. Her 1994 MA thesis on #femalecompetition looks interesting too (not sure if it's available anywhere):

/end
Postscript. The informants for the romance tourist study:

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Ed Hagen

Ed Hagen Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @ed_hagen

Nov 9
1. I intend to positively cite Eppig et al. (2010) despite its retraction for use of the discredited Lynn and Vanhanen national IQ dataset. 🧵

tl;dr: don't throw the baby out with the bathwater
royalsocietypublishing.org/doi/10.1098/rs…RETRACTED: Parasite prevalence and the worldwide distribution of cognitive ability
2. First, please read this excellent article on the Lynn dataset, which details its racist origins (Lynn: "predominantly white states should declare independence and secede from the Union")... statnews.com/2024/06/20/ric…
3. ...and which also details its deep empirical flaws, such as "selectively includ[ing] samples with particularly low scores for sub-Saharan Africa, while disregarding those with higher scores": In 2010, a group of psychologists led by Jelte Wicherts at the University of Amsterdam conducted their own search of the literature and found evidence that Lynn’s dataset was systematically biased: He had selectively included samples with particularly low scores for sub-Saharan Africa, while disregarding those with higher scores. For example, Lynn rejected a relatively high scoring sample of children with an average IQ of 91 because he said the study lacked information regarding the age of the children. At the same time, he included five studies where age information was also lacking, excep...
Read 19 tweets
Jun 25
1. Ethical research in evolutionary psychology (EP) and human genetics (HG): A view from a cynical sociobiologist (me). 🧵
2. Recently @dconroybeam penned an Op-Ed on the harmful use of cherry-picked EP research, citing examples of mass shooters linked to EP-inspired manosphere ideology. He called on EP to do more to "defend our work from misappropriation"
3. Then, @sentientist pushed back, expanding the discussion to racial killings, HG research, and politics, and absolving EP and HG research from responsibility for the bad behavior of others with this central claim:
No public intellectual and no science is responsible for how a small minority of mentally ill people interpret their ideas.
Read 25 tweets
Apr 9
1. According to some, this article provides strong empirical evidence for nonbinary biological sex, so I took a look.

tl;dr: ironically, the article reinforces the case for binary biological sex. 🧵
academic.oup.com/icb/article/63…
2. First, a refresher:

Sexual reproduction, the recombination of two parental genomes into one offspring genome, is very widespread in eukaryotes. This 2→1 mode of reproduction has many evolutionary consequences...
3. In a very wide range of eurkaryotic species, parental genomes are each packaged into cells (gametes) that exhibit:

* Disassortative fusion
* Dimorphic size
* Dimorphic motility
Read 23 tweets
Apr 6
1. Much human genetic variation is phenotypically meaningless. Why? Cooperative genes are locked in a forever war w/ selfish genes. The cooperative genes have won most battles but now our genomes are littered with the dead & decaying bodies of a million selfish genes. 🧵 AI generated image of cooperative warriors blasting an enemy warrior
2. Genome sizes vary tremendously in ways that do not obviously relate to organism complexity, e.g., many fish and amphibians have huge genomes compared to mammals (note that the number of base pairs on the x-axis is on a log scale):
en.wikipedia.org/wiki/Genome_si…
Plot showing that within and across major taxonomic groups, genome size varies by orders of magnitude
3. Why?

The explanation requires the Williams/Dawkins concept of selfish genetic elements that "enhance their own transmission at the expense of other genes in the genome, even if this has no or a negative effect on organismal fitness": journals.plos.org/plosgenetics/a…
Book covers of Adaptation and Natural Selection (Williams) and The Selfish Gene (Dawkins)
Read 17 tweets
Feb 12
1. What do we know about hunter-gatherers (HG)? This is the go-to book, first published in 1995, w/ a 2nd edition in 2013. Here's an overview of the book that I hope will encourage @NPR, @sciam, & others to consult it when reporting on & evaluating the import of new HG studies 🧵 The Lifeways of Hunter-Gatherers: The foraging spectrum by Robert Kelly, Second Edition
2. The key theme is that HGs vary a lot, hence the word *Spectrum* in the subtitle, but in principled ways that are best understood in a human behavioral ecology (HBE) framework: The Lifeways of Hunter-Gatherers. In this book, Robert L. Kelly challenges the preconception that hunter-gatherers should conform to a single type, be that of Paleolithic relics living in a raw state of nature, the original affluent society, or downtrodden proletariat. Instead, he crafts a position that emphasizes diversity in foraging lifeways and efforts to explain that diversity. Kelly reviews the anthropological literature for variation among living foragers in terms of diet, mobility, sharing, land tenure, technology, exchange, male-female relations, division of labor, marriage, descen...
3. The Preface recounts the sensationalist "discovery" of the Tasady, widely reported in the media as Stone Age relics, which was later debunked. A cautionary tale: I remember that I was amazed, amazed at the faces of Tasaday men and women looking back at me from the pages of National Geographic in 1972. To a young high school student who yearned to visit exotic places and to study prehistoric peoples, those photos of the Tasaday afforded the opportunity to do both vicariously. Here was the Stone Age! Hunters and gatherers, unsullied by civilization, who lived "much as our ancestors did thousands of years ago" (MacLeish and Launois 1972: 219). Anthropology, the Tasaday, and, I like to think, I myself have come a long way since 1972. The Tasad...
Read 15 tweets
Dec 18, 2023
1. The causes and consequences of two biological sexes.

A 🧵 that mostly follows Parker (2014) The sexual cascade: doi.org/10.1101/cshper…
The sexual cascade (succession of evolutionary events leading to Darwinian sexual selection) (pink boxes and arrows) showing main transitions and selective forces (white boxes and black arrows) and alternative stable states (blue boxes and arrows). The transitions (A-F) are explained in the text.
2. Major points:

Binary biological sex is not a system to exhaustively categorize every living thing.

Instead, it plays key causal roles in the evolution of many traits across the eukaryotes.

A preview of our journey [syngamy: fusion of two gametes] (Parker 2014): EVOLUTION OF SEXUAL STRATEGIES: THE SEXUAL CASCADE The various evolutionary adaptations surrounding sexuality have presented a formidable challenge for evolutionary biologists and many, from meiosis to sexual selection and sexual con-flict, continue to generate debate. Here and elsewhere (Parker and Pizzari, in press), a deductive approach is developed that seeks to explain sexuality as a sequence of events within a causal framework. It is important to distinguish between irreversible evolutionary transitions that are ubiquitous and fixed in most extant advanced animal taxa and more labile ...
3. Two sexes are ultimately a consequence of sex. Sex (meiosis & fusion of 2 gametes) was present in the last eukaryotic common ancestor, a single-celled organism. (But no sexes yet!)

Sex is a ubiquitous, ancient, & inherent attribute of eukaryotic life: pnas.org/doi/full/10.10…
A eukaryotic phylogeny showing the presence or absence of sex or sex-related genes
Read 25 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

:(