What ants tell us about human societies

September 9, 2016

Arizona is the one of the best places in the U.S. to study ants.

Some consider it the mecca for variety: There are army ants, leaf cutters, harvesters, honey pot ants and ants the size of chia seeds whose entire colony fits in an acorn. Pulitzer Prize-winning author and Regents' Professor Bert Hoelldobler Download Full Image

Ants are also one of the factors that attracted professor Bert Hoelldobler to Arizona and Arizona State University’s School of Life Sciences. Hoelldobler is Pulitzer Prize-winning author of the book “The Ants,” co-authored with E. O. Wilson. He’s also published six other books and more than 325 articles about ants’ complex social networks, behavior and chemical communication.

Much lauded for his scientific achievements, Hoelldobler has received the Lorenz Oken Medal in recognition of his ability to talk about his life’s passion and foster a public dialogue around science.

“Without communication there is no cooperation or division of labor in any social system, be it a society of genes, organelles, cells or organisms,” Hoelldobler said. “My work is to disentangle the complex communication system in ant societies and through that discover and share much about ourselves.”

The Oken medal is the highest recognition bestowed by the German Association for the Advancement of Science and Medicine, founded in 1822. The award is named after German naturalist, philosopher and educator, Lorenz Oken, whose academic accomplishments, like Hoelldobler’s, combined natural sciences with public communication.  

Hoelldobler’s impact has been extensive. His field research on ants has taken him around the globe including Argentina, Australia, Costa Rica, French Guiana, Germany, Finland, Kenya, India, Jamaica, Panama and Sri Lanka. In the U.S., he’s a Foundation Professor and Regents’ faculty member in the social insect research group (SIRG), a one-of-a-kind research and innovation powerhouse in the School of Life Sciences. He’s also an elected member of the American Academy of Arts and Sciences, the American Philosophical Society, and the National Academy of Sciences, in addition to six international societies of note.

Hoelldobler has also maintained strong research connections in Germany. In the last five years, he’s been awarded the Ernst Jünger Prize in Entomology, the Lichtenberg Medal by the Göttingen Academy of Sciences, the Cothenius Medal in Gold from the National Academy of Sciences Leopoldina, and the Roentgen Medal by the University of Würzburg. He was also awarded the Exemplar Award of the American Animal Behavior Society.

Margaret Coulombe

Director, Executive Communications, Office of the University Provost


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Stemming the academic gender gap

ASU study finds female role models are key in the success of women in STEM.
A five-minute intervention from a female role model can help keep women in STEM.
September 9, 2016

ASU psychology researcher finds that a brief intervention by a female role model can help keep women in STEM fields

A large lecture hall on Arizona State University’s Tempe campus filled with anxious chatter as dozens of first-year students filed into row after row of seats. On this day, the students in this so-called “killerSo-called because students enrolled in such introductory college courses — required for first-year students to meet the prerequisites of their chosen majors — often become overwhelmed or disengaged, to the point that they withdraw from the course.” chemistry course would receive the results of their first exam. Sarah Herrmann was confident; she studied hard and expected to do well.

The exams were passed back, and Herrmann’s calm façade turned dour. “My grade was much lower than I expected,” she recalls now.

Undeterred, Herrmann soldiered on. But many women who experience difficulties in STEMscience, technology, engineering and mathematics courses never get past that first bad test grade.


Sarah Herrmann

Nowadays, Herrmann is a psychology graduate student, researching the very phenomenon that once threatened to derail her academic career. Her most recent study, published in the journal Basic and Applied Social Psychology, found that a brief psychological intervention from a female role model made a significant improvement in the retention and grade levels of women in STEM.

“We’ve known about this problem for a while, and it persists,” Herrmann said of female dropout rates in STEM. “What we hope to elucidate are some ways to help.”

For her study, Herrmann looked at students enrolled in an introductory chemistry class at ASU. After the students learned the results of their first exam, they received an email from their professor asking them to participate in a five-minute study for extra credit. The students were randomly assigned to either read a brief letter of encouragement — regardless of their exam score — written by a female graduate student (Herrmann), or to fill out a demographic survey.

Among the female students who were assigned to read the “intervention letter,” 77 percent were less likely to receive a grade of D, or to fail or withdraw from the course, and their grades at the end of the course were two-thirds of a standard deviation higher than those female students who had not read the letter.

Herrmann and her team repeated the experiment with an introductory psychology course and found similar results: Among the female students who were assigned to read the “intervention letter” in the introductory psychology course, 62 percent were less likely to receive a grade of D, or to fail or withdraw from the course, and their grades at the end of the course were a quarter standard deviation higher than those female students who had not read the letter.

“There are two parts of this research that I find particularly exciting,” said Herrmann. “First, the implications for brief psychological interventions and, secondly, what it says about the effect of role models for women’s performance in STEM areas.”

In the intervention letter, Herrmann addressed three key factors that, when positively reinforced, had proven to result in a successful intervention: a sense of belonging, attribution of one’s success or failure, and the presentation of time spent on academics as an investment.

It can be common for women in STEM fields to feel like they don’t belong in an area of study traditionally dominated by men. So the letter first attempted to normalize those feelings of not belonging by sharing relatable anecdotes that demonstrated the female author had had similar experiences — the “you’re not alone in this” angle.

Second, it explained that a bad score on a test shouldn’t necessarily be attributed to one’s fixed level of intelligence — the idea of which can understandably be very discouraging — but rather that one’s academic performance is a malleable feature that can improve with effort and better study strategies.

Finally, the letter sought to reinforce the idea that investing in one’s education and following through despite challenges is worth it in the end.

The combination of those three things, and the fact that the message was coming from an ideal female role model — one who was older, therefore more experienced, and also successful — is what helped the intervention letter make such a difference.

There’s a “leaky pipeline” in STEM when it comes to women, said Herrmann. “You have fewer female professors in STEM fields than you do postdocs, than you do graduate students … and that means that, essentially, there are fewer women as you get further up the line to serve as role models for the women in STEM today. So any way we can expose female STEM students to female role models” is helpful.

And because the intervention style Hermann used in her study doesn’t require a huge time investment, it can be easily adapted into other forms of delivery, such as a text message, a short video, a quick guest lecture or as part of a course orientation package.

It also has implications for use among other underrepresented groups who experience similar challenges in STEM fields, such as minorities and first-generation college students.

Herrmann is enthused by the results of her study, yet cautious to shout eureka.

“We’re just touching the surface here,” she said. “While we’ve discovered some things that are effective at increasing women’s persistence in these fields, there is still more to be done.”

Top photo by Charlie Leight/ASU Now