Showing posts with label epistemology. Show all posts
Showing posts with label epistemology. Show all posts

16 September 2011

Sex, hormones, STEM, and the chronic abuse of correlation

Get ready for a small tirade on gender, science and the abuse of statistics.


This month, a scientific study was released to the press about how overexposure to a certain hormone while in the womb is correlated with more interest in "thing" related careers (farmer, scientist), and less interest in "people" related careers  (social worker, teacher).  In other words, yet another study was released claiming to have found evidence for what Harvard ex-president Lawrence Summers called women's "different availability of aptitude" in STEM fields.  The Penn State researchers gave surveys about job preferences to young women with congenital adrenal hyperplasia (CAH), an endocrine disorder caused by too much male sex hormone in the womb.  Indeed, the women with CAH were more likely to choose the "thing" jobs than women without CAH, implying a biological reason why women are underrepresented in science.  Suggested a graduate student on the project: "[m]aybe we could show females ways in which an interest in people is compatible with STEM careers."



What first got my hackles up was the lack of any discussion about how else CAH could have affected the lives of these women.  CAH is the most common cause of sexual ambiguity, or people who identify as intersex. In people without a Y chromosome (biology refresher: biologically born women are typically XX, and biologically born men are typically XY), this means anything from "partial masculinisation that produces a large clitoris, to virilisation and male appearance. The latter applies in particular to Congenital adrenal hyperplasia due to 21-hydroxylase deficiency, which is the most common form of CAH" (Wikipedia - yeah, I'll cite Wikipedia; I have nothing to be ashamed of).  In other words, the women in this study most likely have their bodies marked by CAH in a way that probably impacted their sociocultural experience, especially in the formative years of puberty.  According to the website intersexualite.org, "some CAH individuals have been identified as males at birth and are reared as boys despite the presence of XX chromosomes and ovaries. In other cases, the masculinization of prenatal life is interrupted at birth, and the child is surgically and hormonally treated and reared as a girl. These girls often have characteristics that are popularly stereotyped as masculine. In addition, many CAH individuals identify themselves as lesbians."  While all the participants in the subject had female genitalia and were raised as female (whatever that means), there is no mention of other CAH-related variables that may have marked their experiences in society.   I'm not saying its not an interesting result, but clearly there may have been additional post-natal variables impacting the choices of these women.  I would love to interview the participants and find out more about their lives, their communities, their educational experiences, and what they believe shaped their career decisions.
While clearly biology has an impact on who we are, researchers who study identity have shown that who we are is a more complicated mix of biological and sociocultural factors than these kinds of studies can possibly sort out.  Just to be clear here, my problem is not with the science: it's interesting, and I'm sure the researchers were thorough.  My problem is with the way in which the results have been presented, both by the researchers, and the science reporters, and the conclusions that have been drawn from them, without reference to other variables.

How many times do I have to say this?  CORRELATION DOES NOT IMPLY CAUSALITY PEOPLE!  Haven't these journalists ever taken statistics?  It's this kind of reckless conclusion "suggesting" that fuels the continuing debates on scientific realities like climate change and evolution.  I know, I know, I worked for a newspaper, I know what it's like to have the A1 editor breathing down your neck about having a compelling lede, and getting people to think this is something totally new, and its all good if you get one (preferably two) dissenting quotes down near the bottom.  But stories like this can be hurtful to our collective idea of what a scientist is, and what a woman is, and what a woman scientist is.  My advisor always says that being a woman scientist is paradox in our society, and when an article opens by suggesting that "[i]f you are a woman who wanted to be a physicist, you may have been fighting your own sex hormones to do it," I know she's got a point.

To me this study makes a strong case for the feminist notion of corporeality, of our identities being marked on our bodies, especially the bodies of women.  Traditionally science, rationality, reason and masculinity have been associated with a mind-body distinction unique to the biological male, while shallowness, sensuality, irrationality and femininity have been associated with a preoccupation with the physical self that makes rational, scientific work unsuitable for ladies.  This is the same classic duality that shows up explicitly in the study, as an interest in "careers related to things" (heady, male careers) as opposed to "careers related to people" (natural, female careers).  (As a side note, just by the choice of those categories we already see evidence of science being socially constructed, even as it is constructing and reconstructing social reality.)   Feminist theory confronts this duality of male and female, rationality and corporeality, by making explicit the importance of the body in our construction of gender and identity.  "The body prompts memory and language, builds community and coalition. The body is a pedagogical devise, a location of recentering and recontextualizing the self and the stories that emanate from that self" (Cindy Cruz,  "Toward an Epistemology of a Brown Body").  I would love to know how the women in this study have experienced CAH, and how it has affected their corporeality, and sociocultural reality.

Here are several links to articles based on this study:

1. Science 2.0 story
2. Time Healthland story
3. Science Daily story

And the original citation:

Beltz, A.M., Swanson, J.L., and Berenbaum, S.A (2011).Gendered occupational interests: Prenatal androgen effects on psychological orientation to Things versus PeopleHormones and Behavior, 60(4).

And the citation for Cindy Cruz's brilliant article, Toward an Epistemology of a Brown Body, which explores the importance of the body and the queer Chicana identity:

Cruz, C. (2001). Toward an epistemology of a brown body. Qualitative Studies in Education,14(5), 657–669.

As a final treat if you didn't get riled up enough by my tirade, here's a cartoon that was a popular email forward for a while, a modern reification of the traditional male-female duality.



21 September 2010

She Blinded Me with Science



I used to love this song, but the video makes me rethink its message. In the end "Mr. Dolby rejects Science and things Scientific." Note the use of capitals, implying that Science itself is some kind whole and separate entity. And not just any entity, but a villain! Mr. Dolby, the science of sexuality is truly incredible. Do not throw the doctor into the river just because you struggle to understand! He doesn't deserve it! I think that if you two sang together about science a little more, you might find it a little less blinding and a little more, ummm, sexy.

On another note, the women in this video all fit the "sexy scientist" stereotype, while the men are all somewhat "mad." Surprised?

12 September 2010

8 Sites that Would Have Made High School Science Way Cooler

Not listed in order of awesomeness.

1. Astronomy: In-browser interactive planetarium app.   There are a lot of these popping up right now, and they are really cool.  The planetarium program I had in high school was limited, expensive and came on five or six floppies. 

2. Planetary Science: Duh, Google Mars.  Pretty much the best map of another planet I've come across.  I have the iPod app too.  

3. Science and Society: A recreation of the Apollo 11 released for the 40th anniversary last year by the JFK library.  In addition to the top-notch simulations of every stage, they have incredible pictures, audio, and even video.  One of my favorites was someone (I think maybe Aldrin?) playing with a blob of water on the capsule.  Listening to the audio from this incredible mission never fails to bring tears to my eyes, it's kind of pathetic.  

4. Physics: A game from the Museum of Science and Industry in Chicago.  You help this cute little creature named Twitch collect little parts for a robot using simple machines (incline plane, fulcrum etc).  A super simple way to introduce physical concepts.  I love it!

5. Cellular Biology: Chock full of animations about cell biology.   A little clicking around will eventually get you to some very cool but simple animations of what goes in our bodies on a microscopic level.

6. Zoology: An online, interactive version of Swiss Naturalist Conrad Gesner's famous work, known as the starting point of modern zoology.  My favorite entry is the Unicorn.  Let's just say zoology has moved forward a bit in the past few centuries. 

7. Genetics: An instant eye color calculator.  It turns out the likelihood of my parents having a blue eyed kid was 1.8 percent!  That makes me feel special.  Play around with genotypes and phenotypes to see what color eyes your kids will have.  

8. ChemistryAn interactive periodic table. .  Depending on your choice of source in drop down menu at the top left, clicking on an square in the table will bring up all kinds of information, photos and videos about that element.  One of my favorite features is the temperature scale, which you can move up and down to change the states of all the elements. 

02 September 2010

More than a McNugget: Chicken Communication

Chickens can talk.  Kind of.  And they're delicious.  What's not to love?

I am a very strange eater. I tell people I'm a vegetarian so as not to bore them, but I'm actually just terribly picky about what animals I will ingest. I believe in transparency of consumption, and in equality of guilt throughout the chain of production (I'll save that for another blog entry). That being said, I like to eat animals. And I don't get to do it very often. So it was a special occasion when Chris bought us a locally farmed, free-range, organic chicken this week and endeavored to roast it in my grandmother's old roasting pan, using the crappiest apartment oven of all time.

The experience got me thinking about chickens. We Americans eat a lot of chicken, and we rarely think twice about it. Most people who decide to cut out only a portion of their meat consumption choose to eliminate pork and beef, often for religious or health reasons. But I think we also feel a stronger connection to the cow and the pig than we do to the lowly broiler chicken.  The former two are mammals, which means we have stronger family ties. Also they are furry, which reminds us of puppies. I could imagine hugging a piglet, a clean one, whereas I can't imagine hugging a chick. Pigs and cows are also a lot larger than chickens, which for some unknown reason seems to mean a lot to us (think of the big fuss over whales). And then of course there is the big I-word: intelligence. Cows and pigs are most certainly more intelligent than chickens.


Carnivores and vegetarians alike love to throw around claims about animal sentience and intelligence as if it is hard core scientific fact. But if I've learned anything studying assessment theory for the past six months, it's that intelligence is not something we can measure accurately even in humans, so what makes us think we can objectify it in animals? Still, there are certain basic mental feats that we consider indications of some amorphous type of animal smarts. One of those is representational communication. In other words, a certain noise or combination of noises that correspond to a certain meaning. The representational nature of human communication is what makes blogging possible; when I type the word chicken, I don't have to show you what I'm talking about, because the combination of the syllables chic- and -ken mean something specific to you already.

As kids, we are taught over and over and over by a myriad of animated movies and TV shows that almost all animals can communicate just as well as we can, and make intelligent decisions based on those communications.  If we are to take these childhood representations as fact, most of this communication is actually inter-species, a kind of encoded English.


Also they tend to wear warm weather accessories but no pants. Oh how those movie producers lie!

There are a lot of animal behaviorists interested in representational communication. Most of this research is on apes, our well known evolutionary cousins. But the creature responsible for the McNugget (or at least a portion of it) turns out to be an interesting research subject as well. Dr. Chris Evans of Macquarie University in Sydney, Australia has found that certain rooster calls trigger nearby hens to look for specific information, i.e. food or predators. These calls have "language-like qualities," and indicate a level of social sophistication that has only been shown for a few mammals. This video shows a hen responding to a call indicating the presence of food.  She walks toward the loudspeaker and begins to peck at the ground, looking for the food.

Personally, I'm impressed.  It may not be Chicken Run, but these birds, which we stuff into windowless houses so pungent with ammonia that they develop sores all over their bodies, and breed to grow so quickly that they cannot support their own weight, aren't empty-headed idiots placed on this Earth as yet another commodity. They are the product of millions of years of evolution, including several thousand (at least) of domestication, which has given them a unique language-like ability to communicate, and I think that they deserve some respect.

So I got out the cloth napkins, and lit some candles.  Cheers to the talking chicken!

Pick a little, talk a little, pick a little, talk a little,
Cheep cheep cheep, talk a lot, pick a little more
Pick a little, talk a little, pick a little, talk a little,
Cheep cheep cheep, talk a lot, pick a little more
Pick a little, talk a little, pick a little, talk a little,
Cheep cheep cheep cheep cheep cheep cheep cheep
Cheep cheep cheep cheep cheep cheep cheep cheep
Cheep cheep cheep cheep cheep cheep cheep cheep
Pick a little, talk a little, cheep!