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Effects of Biological Determinism on Beliefs and Attitudes About Transgender People: Psychological Essentialism and Biased Assimilation

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Abstract

This experimental study examined the effects of biological attributions on individuals’ beliefs and attitudes toward transgender people and the moderating role of right-wing authoritarianism (RWA). We randomly assigned 183 Chinese university students (men: n = 85, women: n = 98) to read one of three fictitious articles. The first article suggested that transgender identity was causally linked to biology (biological determinist condition), the second one highlighted the interplay between biological and environmental factors (epigenetic condition), whereas the third article did not mention the origins of transgender identity (control condition). Consistent with the biased assimilation hypothesis, the effects of biological attributions depended on individual differences in RWA. Low-RWA participants showed higher levels of naturalness and discreteness/homogeneity beliefs about transgender identity in the biological determinist condition than those in the control condition. By contrast, high-RWA participants displayed higher levels of discreteness/homogeneity beliefs but similar levels of naturalness beliefs when they read the biological determinist message compared with the control group. Low-RWA participants showed higher levels of naturalness but similar levels of discreteness/homogeneity beliefs in the epigenetic condition compared with the control, whereas high-RWA participants exhibited lower levels of naturalness and higher levels of discreteness/homogeneity beliefs when they read the epigenetic message compared with the control group. This study also suggests that, contrary to attribution theory, presenting information regarding the biological basis of transgender identity does not necessarily lead to more positive attitudes because (a) it triggers essentialist thinking and (b) the effects of biological attributions depend on recipients’ authoritarian dispositions.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Correspondence to Boby Ho-Hong Ching.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The survey packet included information that described the main purpose of the study, an informed consent form, and the measures. Informed written consent was obtained from all participants. To ensure confidentiality, participants were assured in written consent that their responses were anonymous, and that the data would be kept in a safe place that could only be accessed by the first author and would not be disclosed to other parties without their permission.

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Appendix

Appendix

Experimental Stimuli Used in the Biological Determinist Condition

Born this Way? Researchers Explore the Science of Gender Identity

Some young boys show an early preference for being girls and some young girls are convinced they should be boys. This apparent mismatch of biological sex and gender identity can lead to negative psychological well-being. Coupled with school bullying and family rejection, it can make lives a torment for young people, and the rate of suicide is frighteningly high. As they move into adulthood, they continue to suffer from various types of discrimination. This discrimination stems from a persistent attitude that transgender identification is an aberration of normal sexual development.

However, over the last decades, growing recognition emerged that transgender feelings start very early and are very consistent—pointing to a biological basis. A consortium of five research institutions in Europe and the United States, including Vanderbilt University Medical Center, George Washington University, and Boston Children’s Hospital, has examined the genome, a person’s complete set of DNA, for clues about whether transgender people are born that way.

Scientists in the consortium have embarked on what they call the largest-ever study of its kind, searching for a genetic component to explain why people assigned one gender at birth so persistently identify as the other, often from very early childhood. They extracted DNA from the blood samples of 10,000 people, 3,000 of them transgender and the rest non-transgender, or cisgender.

“Knowing what variations transgender people have in common and comparing those patterns to those of cisgender people may help us understand what role the genome plays in everyone’s gender identity” said Nick Thompson, leader of the study and an assistant professor of medicine at the Vanderbilt Genetics Institute.

This study showed that transgender people had a high frequency of particular DNA variants of four genes that would alter sex hormone signalling while they had been developing in utero.

“There are also reports that identical twins are much more likely to be concordant (that is both transgender, or both cisgender) than fraternal twins or siblings. This suggests a substantial genetic component” added Nick Thompson.

Neurologists have also spotted clues in the brain structure and activity of transgender people that distinguish them from cisgender individuals. A study led by Dutch neurobiologist Dick Swaab, who looked at postmortem brain tissue of transgender subjects, indicated that male-to-female transsexuals had clusters of cells, or nuclei, that more closely resembled those of a typical female brain, and vice versa.

Researchers have begun to discover the biological etiology of transgender identity There may be many other genes that contribute to one’s gender identity. They are not necessarily all concerned with sex hormone signalling. Some may affect brain functions and behavior” says Eric Smith, chief of the division of medical genetics and professor of human genetics, pediatrics, and urology at the University of California, Los Angeles. “So far, two decades of studies have provided hints of a very strong biological origin to being transgender, including the interplay among genetic, hormonal, and neurological factors.

Experimental Stimuli Used in the Epigenetic Condition

Born this Way? Researchers Explore the Science of Gender Identity

Some young boys show an early preference for being girls and some young girls are convinced they should be boys. This apparent mismatch of biological sex and gender identity can lead to negative psychological well-being. Coupled with school bullying and family rejection, it can make lives a torment for young people, and the rate of suicide is frighteningly high. As they move into adulthood, they continue to suffer from various types of discrimination. This discrimination stems from a persistent attitude that transgender identification is an aberration of normal sexual development.

However, over the last decades, growing recognition emerged that transgender feelings start very early and are very consistent—pointing to a biological basis. A consortium of five research institutions in Europe and the United States, including Vanderbilt University Medical Center, George Washington University, and Boston Children’s Hospital, has examined the genome, a person’s complete set of DNA, for clues about whether transgender people are born that way.

Scientists in the consortium have embarked on what they call the largest-ever study of its kind, searching for a genetic component to explain why people assigned one gender at birth so persistently identify as the other, often from very early childhood. They extracted DNA from the blood samples of 10,000 people, 3000 of them transgender and the rest non-transgender, or cisgender.

“Knowing what variations transgender people have in common and comparing those patterns to those of cisgender people may help us understand what role the genome plays in everyone’s gender identity” said Nick Thompson, leader of the study and an assistant professor of medicine at the Vanderbilt Genetics Institute.

This study showed that transgender people had a moderate frequency of particular DNA variants of four genes that would alter sex hormone signalling while they had been developing in utero.

Neurologists have also spotted clues in the brain structure and activity of transgender people that distinguish them from cisgender individuals. A study led by Dutch neurobiologist Dick Swaab, who looked at postmortem brain tissue of transgender subjects, indicated that male-to-female transsexuals had clusters of cells, or nuclei, that more closely resembled those of a typical female brain, and vice versa.

“However, researchers have yet to precisely pinpoint the etiology of transgender identity. Various studies suggest that both biological and environmental variables play a role in transgender development. For example, it is possible that parents pass on their own beliefs about gender, both overtly and covertly. Biology is not the only reason for the development of transgender identity” says Eric Smith, chief of the division of medical genetics and professor of human genetics, pediatrics, and urology at the University of California, Los Angeles. “So far, two decades of studies have provided hints of some biological basis to being transgender, but there is no irrefutable conclusion. We should not ignore the possibility that environment may also shape the brain and how genetic factors are expressed.”

Experimental Stimuli Used in the Control Condition

Coming Out as Trans: Two Personal Stories

The night I came out as transgender to my wife

By Anne Smith, transgender female

Before I came out as transgender, I was a shy reclusive person.

I didn’t have many friends and would never really go out unless it was with my family. I found it very difficult to interact socially; for example, I couldn’t go out for a coffee on my own like everyone else does.

From about primary school age, I knew that there was something wrong.

It was very difficult to make male friends as we just had nothing in common. And I couldn’t make female friends either because I always thought I’d be found out or that they would find it strange.

I spent the first 36 years of my life trying to live how society had told me I should, as male, but I knew that I was female inside and this nearly destroyed me.

So one night, with nothing else to lose as I just couldn’t go on as I was or I would no longer be here, I blurted out to my wife Julie during an argument that I was a freak.

It sounds bad, but I was terrified and I thought that’s how the world was going to see me from now on. To my surprise—after many nights of shouting, screaming, and nearly calling it quits on our marriage—Julie said that she would support me as she still loved me as I still love her.

We’d said in our vows “For richer for poorer, in sickness and in health” and those vows meant something to us both.

I first came out as a trans man when I was 39

By Mike McMullan, transgender male

It was not that I didn’t want to be male before then, it was more that the world had consistently rejected my masculinity.

I always felt male.

I raged every time I was asked to wear something feminine for an event or family photo. I giggle when I see those pictures now as I think that, 30 min before that smiling moment with my sister and brothers, I was a nightmare.

When I was a child, the term for me was tomboy—and I would grow out of it. I look back and feel sad that the person I was constantly rejected.

What I learned from my formative years was I was not good enough or of any significance. That behavior created a lost young adult who never knew how to build a life for himself.

I fell in love and gave my all to partners with nothing being built for me. I couldn’t put words to what was missing.

When eventually I came out, I was attending university to retrain for office-based work. I found it amazingly supportive and non-judgemental as long as I was straight about what was going on.

I was really proud of that college.

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Ching, B.HH., Chen, T.T. Effects of Biological Determinism on Beliefs and Attitudes About Transgender People: Psychological Essentialism and Biased Assimilation. Arch Sex Behav 51, 1927–1942 (2022). https://doi.org/10.1007/s10508-021-02262-8

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