Showing posts with label mathematics. Show all posts
Showing posts with label mathematics. Show all posts

Thursday, 12 December 2019

Women Wearing Swimsuits and Performing in Math

Fredrickson et al. (1998) tested the hypothesis that self-objectification diminishes math performance (n = 82 undergraduate students at the University of Michigan, 42 women and 40 men). Students completed the Self-Objectification Questionnaire, their tendency to body shame was measured, as well as their feelings associated with trying on swimwear; they were given a challenging math test, as well as sweets.



Female participants were randomly assigned to two experimental conditions: trying on a one-piece swimsuit or a V-neck jumper, male participants either wore a swim trunk or a crew neck jumper. In all cases, they did so alone in a dressing rom where they were asked to look at themselves in the full-length mirror and afterwards complete all questionnaires mentioned before. Then, they were given sweets and told to eat as much as they wanted and fill out another questionnaire.



Results show that only in the case of women trying on a swimsuit (i.e. manipulating the state of self-objectification) produced more body shame than trying on a jumper. Self-objectification, again, led to body shame in women. And most interestingly, women performed worse on the math test when wearing a swimsuit than when wearing a jumper (Fredrickson et al., 1998).
In 2004, Hebl, King and Lin replicated the study with 400 undergraduate students (with a focus on gender and ethnicity) and supported the findings that "sellf-objectification serves as a mechanism through which the experience of wearing a swimsuit affected psychological and behavioral outcomes", that women had lower self-esteem and body image than men. However, they added: "All individuals can be vulnerable to the consequences of self-objectification."



- Fredrickson, B. L., Noll, S. M., Roberts, T.-A., Quinn, D. M. & Twenge, J. M. (1998). That Swimsuit Becomes You: Sex Differences in Self-Objectification, Restrained Eating, and Math Performance. Journal of Personality and Social Psychology, 75(1), 269-284.
- Hebl, M., King, E. B. & Lin, J. (2004). The Swimsuit Becomes Us All: Ethnicity, Gender and Vulnerability to Self-Objetcification. Personality and Social Psychology Bulletin, 30(10), link
- images of Alain Delon and Romy Schneider (La Piscine, 1969) via and via and via

Friday, 24 May 2019

Arabic Numerals Misunderstood

The US-American market research company Civic Science conducted a survey asking 3.624 people whether schools in America should teach Arabic numerals as part of their curriculum without explaining the term "Arabic numerals" since that would have spoilt the fun of teasing out "prejudice among those who didn't understand the question". According to the chief executive of Civic Science, the results were "the saddest and funniest testament to American bigotry we've ever seen in our data". Apparently, a great many people did not know what these numerals mean, some 2.020 (56%) answered "no", only 29% said "yes" and 15% had no opinion. Even when controlling for education (i.e., not having a significant difference in education), 72% of Republican-supporting respondents said "no" versus 40% of Democrats. In other words, the answers are not only about knowledge of the numerical nomenclature (via).



So, where do Arabic numerals come from? Muhammad Khwarizmi (780-850), "the father of algebra" (the word "algebra" is derived from the title of one of his books), was "a Persian scholar who produced works in mathematics, astronomy, and geography" (via), a poet and philosopher, Cabinet member in Dawala's government of Iran (Broumand, 2006), and the very Persian who introduced the Arabs to the Hindu decimal numerals (via), now known as Arabic numerals.
In the 12th century, Latin translations of his textbook on arithmetic (Algorithmo de Numero Indorum) which codified the various Indian numerals, introduced the decimal positional number system to the Western world. (via)
Khwarizimi is often referred to as an Arab or Islamic scientist despite having been Persian. Similarly, Avicenna (Ibn Sina, 980-1037), "the father of early modern medicine" was Persian and is regularly mentioned as a great contributer to science from the Arabian or Islamic world. Avicenna's famous encyclopedia "became a standard medical text at many medieval universities and remained in use as late as 1650" (via).

As Broumand (2006) observes there is a failure in calling them Arab scientists:
This false statement only widens the gap between the Middle-East and the western world. There could be no doubt on the fact that Razi (Rhazes), Ibn-Sina (Avicenna), and Khawrazmi (Khwarizmi) were Iranian (Persian) and not Arab scientists. Dr. Maziak’s sincere attempt to lump these scientists under the label of Arab-Islamic scholars is unfortunately flawed for a couple of reasons; a very important point is that, the Arabic language was the lingua franca of these scientists’ era and allowed for the free exchange of scientific knowledge from Greece and Rome to Iran, India, and even to places as far as China. There is no doubt that for this reason, scientists were writing in Arabic, while not being Arab, like in the present time, all scientists write in English. One could argue that it is as offensive to Iranians, as it would be to the English, if everyone claimed Sir Isaac Newton was a Frenchman. Not that there is anything wrong with being French, Arab, or from any other nations, but the incorrect label abolishes a significant part of Iranian contribution to the advancement of science.
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- Broumand, B. (2006). The Contribution of Iranian Scientists to World Civilization. Archives of Iranian Medicine, 9(3), 288-290.
- photograph via

Wednesday, 20 September 2017

Born this day ... Lee Lorch

"Because he believed in the principles of decency and justice, and the equality of men under God, Lee Lorch and his family have been hounded through four states from the North to the South like refugees in displaced camps. And in the process of punishing Lee Lorch for his views, three proud institutions of learning have been made to grovel in the dust and bow the knee to bigotry."
Ethel Payne



Lee Lorch (1915-2014) was a mathematician and civil rights activist. He obtained his PhD in mathematics from the University in Cincinnati in 1941.
After World War II, Lorch started teaching at the City College of New York "but was soon fired because of his civil rights work on behalf of African-Americans." Shortly after taking up his job at the City College of New York, he moved into Stuyvesant Town, a private residential development on the east side of Manhattan, owned by the Metropolitan Life Insurance. Blacks were barred from living there as, according to the president of Metropolitan Life, "negroes and whites do not mix" and apart from that "it would be to the detriment of the city, too, because it would depress all surrounding property." Lee Lorch had all the credentials to move in, i.e., a "steady job, college, teacher and all that. And, not black." The lawsuit against Metropolitan that had been brought in by several people and organisations in 1947 had failed in the state courts as the insurance company was free to select tenants based on absurd criteria. Lorch was aware of the discrimination other faced and became a vice-chair of the tenants' committe that was founded to eliminate the housing discrimination. He also invited a black family (art student Hardine and Raphael Hendrix and their 6-year-old son Hardine Jr.) to live in his own flat where he was living with his wife (a longtime activist herself) and his young daughter.
"The Stuyvesant Town tenants committee, with 1,800 members, was made up of the families of veterans who believed that after fighting a war for justice overseas, they could not ignore injustice at home. "The courage and sharpshooting of a Negro machine gunner saved my life with a dozen other white G.I.'s (...). Can any one of us say he can't be my neighbor? I can't." Surveys of residents conducted by the tenants committee showed that two-thirds of Stuyvesant Town's 25,000 tenants opposed MetLife's exclusionary policy."  (Fox, 2010)
"I had become very aware of racism through the war; not just anti-Semitism, but the way the American army treated black soldiers. On the troop transport overseas, it was always the black company on board that had to clean the ship and do the dirty work, and I felt very uncomfortable with that." Lee Lorch, 2007
Metropolitan Life refused to accept the Lorches' rent check and started searching for ways to get them out. But Lorch had decided not to go quietly, that he would resist and that they had to throw him out by force.
"Nineteen of the families decided to fight to keep their apartments. (...) The city marshal ordered the targeted tenants to be out of their apartments by 9 o'clock on the morning of Jan. 17, 1952, and hired a moving company to drag their furniture onto the street. In response, the families barricaded their doors. They sent their children to stay with relatives and passed baskets of food from window to window with ropes."  (Fox, 2010)
In 1950, Metropolitan Life admitted three token black families but did not change its tenant housing policy. In 1959, only 47 black tenants lived in Stuyvesant Town.



Lorch did not pay the price for his activism only once. In 1949, he was forced to leave City College since he was "unquestionably a fine scholar and a promising teacher" but "an irritant and a potential troublemaker". The N.A.A.C.P. protested the decision ... but Lorch had to leave.
Lorch started teaching at Pennsylvania State University. When he arrived at the campus, he was immediately taken to the university's acting president whom he had to explain what had happened at Stuyvesant Town as the university had received phone calls from wealthy alumni who wanted to know why Lorch had been hired. He was denied reappointment because he had accommodated a black family which was "extreme, illegal and immoral, and damaging to the public relations of the college." Students, the American Association of University Professors, the American Mathematical Society, The New York Times, The Daily Worker, and Albert Einstein protested ... but Lorch had to leave.
In 1950, Lorch became one of two white professors at historically black Fisk University. He continued his activism, tried to enroll his daughter in an all-black school, refused to answer questions before the House Un-American Activities Committee ... in 1955, Lorch had to leave Fisk University.
When the Little Rock Nine enrolled in Little Rock Central High School in 1957, Lee Lorch - at that time an official with the Arkansas chapter of the N.A.A.C.P. and chair of the Mathematics Department at Philander Smith College in Little Rock - was working behind the scenes and accompanying the students to school and tutoring them. He was told his best contribution would be to terminate his affiliation with the Little Rock Branch of the N.A.A.C.P. Whites abused him for his desegregation activism, blacks kept their distance because of the "un-American" stance he was accused of. After threats and the school's funding at risk, Lorch resigned.
By 1959 it was official that no US-American college would have him, Lorch was blacklisted. The family moved to Canada where he taught at the University of Alberta and then at York University until he retired.
In 2010, Lee Lorch was asked if he would do anything differently. His reply: "More and better of the same."
"It's hard to imagine now, but there was no civil rights legislation back then. You could be fired without explanation. But how could you do anything else, in all good conscience?" Lee Lorch
Decades later, several colleges - among them two that had fired him - and associations gave Lee Lorch honorary degrees and other awards (via and via).

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- Fox, A. (2010). Battle in Black and White. In Rosenblum, C. (ed.) More New York Stories. The Best of the City Section of The New York Times, New York & London: New York University Press, 246-253
- photographs via and via

Saturday, 16 May 2015

Women, Maths & Stereotype Threat

Do stereotypes – such as women having inferior mathematics skills - have an effect on calculus performance? In order to answer that question, 102 female undergraduates majoring in STEM (science, technology, engineering, mathematics) fields were randomly assigned to three groups: 1) stereotype threat (women were told that there were gender differences and that men performed better than women), 2) gender equivalence (subtle cues: women were told that there were no gender differences and that men and women performed equally), and 3) no mention of gender.



According to Stelle (1997), "stereotype threat should have its greatest effect on the better, more confident students in stereotyped groups, those who have not internalized the group stereotype to the point of doubting their own ability and have thus remained identified with the domain - those who are in the academic vanguard of their group."



The results: Women performed the worst in the stereotype threat condition, intermediate in the gender equivalence condition and best in the no mention condition. In addition, the effect of stereotype threat on performance was greatest for women with higher skills (Steinberg et al., 2012). Stereotypes do matter.



- Steinberg, J. R., Okun, M. A. & Aiken, L. S. (2012). Calculus GPA and Math Identification as Moderators of Stereotype Threat in Highly Persistent Women. Basic and Applied Social Psychology, 34, 534-543
- photographs "NASA before Powerpoint" by J. R. Wharton Eyerman (1961) via and via and via

This posting was originally published on Science on Google+ on 6th of December 2014