biology

Cross-posted at Ms. and the Huffington Post.

I loathe to weigh in on the “war on men” conversation, but… alas.

While one can use both logic and data to poke gaping holes in Suzanne Venker’s argument that women need to surrender to their femininity and let men think that they’re in charge if they ever want to get married, I just want to point out one thing — one endlessly repeated thing — that she gets very, very wrong.

Venker claims that there has “been an explosion of brain research” that proves that men and women have different brains.  This research, she claims, shows that men are loners who like to hunt and build things and women are nurturers who like to talk and take care of people.

This false on two fronts.

First, she’s wrong about the brain research.  The books and articles claiming that there are “pink” and “blue” brains are not consistent with existing research.  (They are out there because people can make a lot of money by confirming other people’s biases.)

What does the research say?

It’s true that scientists have documented a number of small, average sex differences in brain anatomy, composition, and function, as well as differences in size and tissue ratios.  (Other differences — such as the size of the corpus callosum and lateralization, whether one sex uses one side of their brain more than the other — have proven to be wrong.)

So, scientists do find some differences, but they have largely failed to link these to differences in men’s and women’s observed emotions, cognition,  or behavior.  That is, we’ve found some differences, but we have no proof that they translate into anything. Moreover, new research suggests that differences we observe may be designed not to create differences between men and women, but to reduce them.  The brain may have two strategies for achieving the same outcome or one difference may compensate for another.  (For more, see Brain Gender by Melissa Hines.)

That’s one reason why Venker is wrong.

The second reason is even more damning.  Most of the research attempting to explain gender difference assumes that there differences to explain.   In fact, meta-analyses aimed at summarizing the literature on human sex differences and similarities in traits, personality, cognitive abilities, sexuality, temperament, and motor skills offer better evidence for similarity than difference.  On the vast majority of traits, men and women overlap tremendously.

Janet Hyde, a pioneer in this area, did a meta-analysis of meta-analyses that combined the results of 7,084 separate studies. She found evidence for a large or very large difference on 8% of characteristics and evidence for medium-sized differences on 15%.  She found evidence for small differences on another 48%.  What does a small difference look like?  Here’s an example of a mid-range small difference (for self-esteem):

For the final 30% of characteristics, she found no evidence gender difference.  So, on 78% of characteristics, she found teensy differences or none at all.  Wow, “opposite sexes” indeed.

The truth is, men aren’t loners and women aren’t talkers. Venker assumes the stereotypes and counts on her readers to agree that they are true, but the data doesn’t back her up.

Two excellent books summarize the debates over gender and neuroscience.  Cordelia Fine’s Delusions of Gender is great for a beginner. She’s funny and you’ll learn a lot. Rebecca Jordan-Young’s Brain Storm is great for someone who wants and intermediate to advanced introduction to these issues.  Her book is downright brilliant.  I highly recommend both.

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Lisa Wade is a professor of sociology at Occidental College.  Feel free to take a look at her forthcoming article, “The New Science of Sex Difference.”  You can also follow her on Twitter and Facebook.

New neurological research, reported by Robert Wright at The Atlantic, suggests that racism is learned.  Earlier studies had shown that the amygdala, “a brain structure associated with emotion and, specifically, with the detection of threats,” is active, on average, when White people see Black faces.

A new paper, however, led by Eva Telzer, shows that we don’t see this reaction until about age 14. Moreover,  how powerfully it is after the age of 14 depends on the racial composition of your peer group.  White people who grow up in more diverse environments show a much weaker reaction than those in homogeneous ones.

This figure illustrates the difference.  As peer diversity increases, reaction of the amygdala retreats to zero.

This is what it means, Wright explains, to say that race is a social construct:

It’s not a category that’s inherently correlated with our patterns of fear or mistrust or hatred, though, obviously, it can become one. So it’s within our power to construct a society in which race isn’t a meaningful construct.

For lots of examples of why race is socially constructed, see our Pinterest board on the topic.

And, for other super cool stories about biology, see language, culture, and color; a story of human echolocation; human brain synchronicity; and men with higher voices have higher sperm counts.

Originally posted in 2012. Re-posted in solidarity with the African American community; regardless of the truth of the Martin/Zimmerman confrontation, it’s hard not to interpret the finding of not-guilty as anything but a continuance of the criminal justice system’s failure to ensure justice for young Black men.

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.

The mass media often enjoys stoking the fires of the “nature/nurture debate,” an argument between those who believe that human behavior is largely inborn (nature) and those who believe it is largely learned (nurture).  In fact, most scholars reject this forced choice in favor of the idea that nature and nurture are forces that shape each other.

In this view, biology is both an independent and a dependent variable.  That is, it acts on us in ways that shape our interactions with others (such that behavior is dependent on biology) and our interactions with others shape our biology (such that our biology is dependent on our behavior).  I’ve published professionally on this topic and we’ve previously posted examples involving the socio-genetic causation of psychopathy, the response of testosterone levels to political victories, and the historical shift in the average age of menstruation.

Today’s example comes from an fMRI study of emotion.  They discovered that, when we watch others experience emotions, our brains sync up with theirs.  Our bodies, in other words, strongly react to environmental stimuli.  This, argues one of the researchers, “…facilitates understanding others’ intentions and actions… [as well as] social interaction and group processes.”

It may seem obvious that our neural activity would respond to our environments, but I think it bears emphasizing.  It is too easy for us, in a society that seems eager for a biological explanation for everything, to ignore the ways in which the body is a dependent variable as well as an independent one.  In many ways it makes sense to think of our biologies as the matter through which social interaction occurs.  In other words, while we often think of society as the medium for the transmission of genes, I also like to think of biology as the medium for the transmission of society.

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.

Earlier this week I wrote a post asking Is the Sky Blue?, discussing the way that culture influences our perception of color.  In the comments thread Will Robertson linked to a fascinating 8-minute BBC Horizon clip.  The video features an expert explaining how language changes how children process color in the brain.

We also travel to Namibia to visit with the Himba tribe.  They have different color categories than we do in the West, making them “color blind” to certain distinctions we easily parse out, but revealing ways in which we, too, can be color blind.

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.

The term sexual dimorphism refers to differences between males and females of the same species.  Some animals are highly sexually dimorphic. Male elephant seals outweigh females by more than 2,500 pounds; peacocks put on a color show that peahens couldn’t mimic in their wildest dreams; and a male anglerfish’s whole life involves finding a female, latching on, and dissolving until there’s nothing left but his testicles (yes, really).

On the spectrum of very high to very low dimorphism, humans are on the low end.  We’re just not that kind of species.  Remove the gendered clothing styles, make up, and hair differences and we’d look more alike than we think we do.

Because we’re invested in men and women being different, however, we tend to be pleased by exaggerated portrayals of human sexual dimorphism (for example, in Tangled). Game designer-in-training Andrea Rubenstein has shown us that we extend this ideal to non-human fantasy as well.  She points to a striking dimorphism (mimicking Western ideals) in World of Warcraft creatures:

Annalee Newitz at Wired writes:

[Rubenstein] points out that these female bodies embody the “feminine ideal” of the supermodel, which seems a rather out-of-place aesthetic in a world of monsters. Supermodelly Taurens wouldn’t be so odd if gamers had the choice to make their girl creatures big and muscley, but they don’t. Even if you wanted to have a female troll with tusks, you couldn’t. Which seems especially bizarre given that this game is supposed to be all about fantasy, and turning yourself into whatever you want to be.

It appears that the supermodel-like females weren’t part of the original design of the game.  Instead, the Alpha version included a lot less dimorphism, among the Taurens and the Trolls for example:

Newitz says that the female figures were changed in response to player feedback:

Apparently there were many complaints about the women of both races being “ugly” and so the developers changed them into their current incarnations.

The dimorphism in WoW is a great example of how gender difference is, in part, an ideology.  It’s a desire that we impose onto the world, not reality in itself.  We make even our fantasy selves conform to it.  Interestingly, when people stray from affirming the ideology, they can face pressure to align themselves with its defenders.  It appears that this is exactly what happened in WoW.

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.

I’m reposting this piece from 2008 in solidarity with Lisa Wade (no relation), whose (non-white) child was described by his teacher as  “the evolutionary link between orangutans and humans.”  It’s an amateur history of the association of Black people with primates. Please feel free to clarify or correct my broad description of many centuries of thought.

The predominant colonial theory of race was the great chain of being, the idea that human races could be lined up from most superior to most inferior.  That is, God, white people, and then an arrangement of non-white people, with blacks at the bottom.

Consider this drawing that appeared in Charles White’s An Account of the Regular Gradation in Man, and in Different Animals and Vegetables (1799). On the bottom of the image (but the top of the chain) are types of Europeans, Romans, and Greeks.  On the top (but the bottom of the chain) are “Asiatics,” “American Savages,” and “Negros.”  White wrote: “In whatever respect the African differs from the European, the particularity brings him nearer to the ape.”

Nearly 70 years later, in 1868, Ernst Haeckel’s Natürliche Schöpfungsgeschichte was published.  in the book, this image appeared (his perfect person, by the way, was German, not Greek):

In this image, we see a depiction of the great chain of being with Michelangelo’s sculpture of David Apollo Belvedere at the top (the most perfect human), a black person below, and an ape below him.

Notice that there seems to be some confusion over where the chain ends.  Indeed, there was a lot of discussion as to where to draw the line.  Are apes human?  Are blacks?  Carolus Linneaus, that famous guy who developed the classification system for living things, wasn’t sure.  In his book Systema Naturae (1758), he published this picture, puzzling over whether the things that separating apes from humans were significant.

In this picture (also appearing in White 1799) are depictions of apes in human-like positions (walking, using a cane).  Notice also the way in which the central figure is feminized (long hair, passive demeanor, feminized body) so as to make her seem more human.

Here we have a chimpanzee depicted drinking a cup of tea.  This is Madame Chimpanzee.  She was a travelling attraction showing how human chimps could be.

In any case, while they argued about where to draw the line, intellectuals of the day believed that apes and blacks were very similar.  In this picture, from a book by Robert Knox called The Races of Men (1851), the slant of the brow is used to draw connections between the “Negro” and the “Oran Outan” and differences between those two and the “European.”

The practice of depicting the races hierarchically occurred as late as the early 1900s as we showed in a previous post.

NEW! Nov ’09) The image below appeared in the The Evolution of Man (1874 edition) as part of an argument that blacks are evolutionarily close to apes (source):
During this same period, African people were kept in zoos alongside animals.  These pictures below are of Ota Benga, a Congolese Pygmy who spent some time as an attraction in a zoo in the early 1900s (but whose “captivity” was admittedly controversial at the time).  (There’s a book about him that I haven’t read.  So I can’t endorse it, but I will offer a link.)  Ota Benga saw most of his tribe, including his wife and child, murdered before being brought to the Bronx Zoo.  (It was customary for the people of his tribe to sharpen their teeth.)

The theorization of the great chain of being was not just for “science” or “fun.”  It was a central tool in justifying efforts to colonize, enslave, and even exterminate people.  If it could be established that certain kinds of people were indeed less than, even less than human, then it was acceptable to treat them as such.

This is a “generalizable tactic of oppression,” by the way.  During the period of intense anti-Irish sentiment in the U.S. and Britain, the Irish were routinely compared to apes as well.

So, there you have it.  Connections have been drawn between black people and primates for hundreds of years.  Whatever else you want to think about modern instances of this association — the one Wade and her child are suffering now, but also the Obama sock monkey, the Black Lil’ Monkey doll, and a political cartoon targeting Obama — objections are not just paranoia.

(I’m sorry not to provide a full set of links.  I’ve collected them over the years for my Race and Ethnicity class.  But a lot of the images and information came from here.)

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.

Earlier this month NPR profiled Alex Hernandez, a member of a Mexican third gender.  This prompted me to re-post our discussion of muxes from 2008.  Images of Hernandez, taken by photographer Neil Rivas, are added at the end.

A New York Times article this week briefly profiles muxes, a third “gender” widely accepted in Oaxaca, Mexico.  According to the article, this part of Mexico has retained many of the pre-colonial traditions.  One of these included flexibility around gender and sexual orientation.  From the article:

There, in the indigenous communities around the town of Juchitán, the world is not divided simply into gay and straight. The local Zapotec people have made room for a third category, which they call “muxes” (pronounced MOO-shays) — men who consider themselves women and live in a socially sanctioned netherworld between the two genders.

“Muxe” is a Zapotec word derived from the Spanish “mujer,” or woman; it is reserved for males who, from boyhood, have felt themselves drawn to living as a woman, anticipating roles set out for them by the community.

…

Not all muxes express their identities the same way. Some dress as women and take hormones to change their bodies. Others favor male clothes. What they share is that the community accepts them; many in it believe that muxes have special intellectual and artistic gifts.

Robin B. pointed us to a slide show at NPR.

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.

Evolutionary psychologists argue that when we find certain traits sexually attractive in others it may be because they signal reproductive fitness.  It goes something like this: People who have been sexually attracted to traits that tell the “truth” about genetic superiority have been more likely to choose mates with superior genetics and, therefore, have been more likely to produce healthy offspring that live to an age where they, in turn, can reproduce themselves.  Accordingly, nature has selected for individuals attracted to people who display signs of genetic excellence.

Culture throws a wrench in this theory because human can create their own systems of meaning, collectively convincing each other that certain traits are desirable regardless of the relationship between the trait and reproductive fitness.  The thinness ideal for women is an excellent example.  Judging by pop culture, heterosexual men have a strong preference for very thin women.  In fact, however, the weight idealized in mass media is not conducive to reproductive fitness; women won’t ovulate or menstruate below a certain weight because their body recognizes that it can’t support a pregnancy.

A new study — by Leigh Simmons, Marianne Peters, and Gillian Rhodes — offers another tantalizing piece of information regarding the relationship between attractiveness and reproductive fitness.  Pre-existing research shows that men with lower voices are judged more sexually attractive, so the authors decided to measure one indicator of their reproductive fitness, sperm count.

The results? Voice attractiveness is related  to sperm count, but in the opposite direction expected.  Men with higher voices, in fact, have higher sperm concentration, not lower.

The jury is still out about what this means, but it’s an intriguing addition to the ongoing conversation that social and biological scientists are having about how culture and nature interact to shape human experience.

Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.