Category: Research news

Genetic effects of gender atypical behavior and sexual orientation: A study of Finnish twins

Due to time constraints, this post is less review than description of results. However, I wanted to post something on this study in advance of some commentary coming from Michael Bailey on the topic.
Here is the reference and abstract:

Abstract: The existence of genetic effects on gender atypical behavior in childhood and sexual orientation in adulthood and the overlap between these effects were studied in a population-based sample of 3,261 Finnish twins aged 33–43 years. The participants completed items on recalled childhood behavior and on same-sex sexual interest and behavior, which were combined into a childhood gender atypical behavior and a sexual orientation variable, respectively. The phenotypic association between the two variables was stronger for men than for women. Quantitative genetic analyses showed that variation in both childhood gender atypical behavior and adult sexual orientation was partly due to genetics, with the rest being explained by nonshared environmental effects. Bivariate analyses suggested that substantial common genetic and modest common nonshared environmental correlations underlie the co-occurrence of the two variables. The results were discussed in light of previous research and possible implications for theories of gender role
development and sexual orientation.
Common Genetic Effects of Gender Atypical Behavior in Childhood
and Sexual Orientation in Adulthood: A Study of Finnish Twins
K. Alanko, P. Santtila, N. Harlaar, K. Witting, M. Varjonen, P. Jern, A. Johansson, B. von der Pahlen, & N. K. Sandnabba. Arch Sex Behavior.

The sample was obtained via a registry maintained by the Central Population Registry of Finland which includes all twin pairs born in 1971 or earlier. The researchers requested information from the twins and received responses from 36% of those surveyed (3,604). For various reasons, the authors assume representativeness of their sample, although I think they might be open to some challenge on this point given the response rate.
The authors used Zucker’s Recalled Childhood Gender Identity/Gender Role Questionaire and Sell’s Assessment of Sexual Orientation. The SASO assesses both behavior and attractions via four items:

Item 1: During the past year, on average, how often were you sexually attracted to a man (woman for female participants)? The response alternatives were: never, less than 1 time per month, 1–3 times per month, 1 time per week, 2–3 times per week, 4–6 times per week, daily. Item 2: During the past year, on average, how often did you have sexual contact with a man (woman for female participants)? The response alternatives were the same as for Item 1 above. Item 3: How many different men (women for female participants) have you had sexual contact with during the past year? Item 4: During the past year, on average, how many different men (women for female participants) have you felt sexually attracted to? The response alternatives to Items 3 and 4 were: none, 1, 2, 3–5, 6–10, 11–49, 50–99, 100C. The participants were given numerical scores so that a response of ‘‘none’’/‘‘never’’ gave a score of 0 and a response of ‘‘100 or more’’/‘‘daily’’ gave a score of 7.

Here are the correlations of twins sharing traits of sexual orientation and gender atypical behavior.
Alanko et al, table 3
Correlations were higher for identical twins than fraternal twins for both traits, especially for women. About the genetic contribution to GAB and sexual orientation, the authors said:

Significant genetic effects were found for women and men for both GAB and sexual orientation, as was our second hypothesis. The heritability estimates for childhood GAB were 51% and 29%, and for sexual orientation 45% and 50%, for women and men, respectively.

These numbers are higher than past studies and may be related to the nature of the sampling although this is not clear.
The authors also found a relationship between GAB and sexual orientation.

Our first aim was to study the phenotypic correlations between childhood GAB and adult sexual orientation. Significant correlations of moderate sizes were found, indicating that the two phenomena were related. The strength of the phenotypic association was higher for male participants, implying that childhood GAB was a stronger predictor of adult sexual orientation for men.

The authors note that these data in conjunction with past studies lead them to propose the possibility of several pathways to homosexual attractions.

There might, in other words, be different genotypes for different kinds of homosexuality. It might also be possible that the relative importance of shared environment and genetic influences vary during development. It is plausible that parents influence their children directly only as long as they live at home (Knafo et al., 2005; Plomin et al., 2001). Bailey et al. (2000) found that GAB predicted about 30% of the variance in men’s sexual orientation. As neither the phenotypic nor the genetic correlations were unity in the present sample, GAB preceded a homosexual orientation for some participants, whereas gender typicality preceded a homosexual orientation for other participants.

What did not show up was any significant role of shared environment for men. A small amount of the effect could be attributed to shared environment for women. Another data point suggesting that the pathways to adult sexual orientation are different for men and women.
Stay tuned…

Parenting, homosexuality and gender atypical behavior

Over the next several days, I am going to comment on lots of new research out of Finland. Here is a preliminary post with a result sure to be surprising to some.
First the reference and abstract:

Alanko K, Santtila P, Witting K, Varjonen M, Jern P, Johansson A, von der Pahlen B, Kenneth Sandnabba N., Psychiatric Symptoms and Same-Sex Sexual Attraction and Behavior in Light of Childhood Gender Atypical Behavior and Parental Relationships,
J Sex Res. 2009 Apr 2:1-11. [Epub ahead of print]
This study explores the relation between the level of current symptoms of depression and anxiety and recalled childhood gender atypical behavior (GAB), and quality of relationships with parents among men and women who reported same-sex sexual attraction or engaged in same-sex sexual behavior and men and women who did not. Matched pairs, 79 men (n = 158) and 148 women (n = 296), with equal levels of GAB were created of Finnish participants with either same-sex sexual attraction or behavior and participants without. The measures used were retrospective questionnaires. Ratings of maternal and paternal over-control and coldness differed as a function of same-sex sexual attraction or behavior. Childhood GAB was correlated with negative ratings of parental relationships. Both same-sex sexual attraction or behavior and a history of childhood GAB affected the reported levels of current depression and anxiety. Only gender typical participants with no same-sex sexual attraction or behavior reported significantly lower levels of symptoms. The findings suggest that childhood GAB is related to later distress both among hetero- and homosexual individuals. The elevated level of psychological distress among homosexual individuals, reported in several studies, might-to some extent-be caused by their generally higher levels of childhood GAB as opposed to a homosexual orientation per se.

The study investigated 3 hypotheses. They were:
1. Childhood GAB is related to a negative parent-child relationship.
2. Homosexual orientation is related to a negative parent-child relationship.
3. Childhood GAB, more than current sexual orientation, predicts the level of current psychiatric symptoms.
This study emerges from an ongoing research program at the Center of Excellence for Behavior Genetics, Department of Psychology, Abo Akademi University in Turku, Finland. I will have more to say about the entire study in later posts, I want to lead off with one of the more provocative findings of this paper.
Regarding their fathers, the authors found that gay males reported warmer relationships than straight males. The researchers stated,

A distant (cold) relationship with the father of gay men was expected on the basis of previous studies; however, in this study, gay men reported warmer paternal, as well as maternal, relationships than heterosexual men did.

There is more to report here but that one will get us started. I am tracking down the instrument used to assess relationship warmth which will demonstrate more clearly what the modest differences signify.
Overall, the study finds that GAB also relates to negative parenting and current distress whether the participants were gay or straight. The GAB factor may help unravel some of the findings of poorer mental health outcomes previously reported for gays and lesbians.

Preview of coming attractions

Here is a preview of posts for the next couple of weeks.
1. New research – Commenter Evan pointed out two new studies of interest, one a twin study and the other related to the the role of gender atypical behavior in adult mental distress. In additional to those two papers, there are two other studies on childhood gender nonconformity that I want to review as well.
2. Q&A with Michael Bailey – Dr. Bailey will comment on the new Finnish twin study. He will also speak about the mistakes those on the right and left make in interpreting these studies.
3. Rebuttal to the Pink Swastika – I will be providing a guest post, a difficult to locate response to arguments which form the basis for the Pink Swastika and primary sources which contradict Scott Lively’s view that the Nazism was animated by homosexuality.
I suspect those posts will lead to several follow ups that should keep us busy.

Multiple pathways to sexual orientation, Part 3

In my 2002 article on ex-gay research, I cited a study by Nottebaum et al which explored change among Exodus participants. In addition to comparing gay and ex-gay groups on change, the study compared self-assessments of quality of parent-child relationships. Here is the portion of my article where I refer to this study:

Nottebaum et al. (2000) asked participants if they had good relationships with their mothers and fathers while growing up. The gay male/lesbian participants described a significantly better relationship with parents than did the Exodus group. The Exodus men
especially disagreed with the question. At least two broad possibilities
exist to help clarify this finding. First, the gay men and lesbians who decided to change had childhood experiences different from those who identified themselves as gay (and who continued with that identification). Perhaps those who seek reorientation really do demonstrate a childhood pattern similar to the one predicted by ex-gay theorists Moberly (1983) and Nicolosi (1991). Perhaps, however, those gay men and lesbians who did not seek change experienced more satisfying childhood relationships. If this hypothesis could be supported by additional empirical work, then perhaps reparative theory may only describe those gay men and lesbians who are significantly distressed by their sexual feelings. Another perspective is that each group interpreted their experiences in keeping with the theory of causation of same-sex feelings most acceptable to them. Given that many Exodus groups assert a specific reparative theoretical view of causation, the participants in Exodus could experience a need to reinterpret their experiences through this theoretical framework. Additionally, the report of the gay male and lesbian sample may then have been a better-than actual representation to avoid fitting the traditional stereotype.

Bell, Weinberg & Hammersmith’s research seems to support the former hypothesis and I should have cited those findings at that time. Please note that while it is possible that childhood disruptions with parents play a role in later sexuality, it is also plausible that childhood gender nonconformity could figure into negative parental responses to children (moreso boys than girls). Thus, negativity of relationship is present but not causative of adult sexual attractions. The narrative presented by a reparative therapist or ministry as a cause would seem quite plausible given the co-occurrence of negative interactions and socially nonconforming gender interests.
On point, the existence of same-sex attracted people without any trauma in their history seems to falsify this recent statement of Joe Nicolosi:

In other words, that fact remains that if you traumatize a child in a particular way you will create a homosexual condition. If you do not traumatize a child, he will be heterosexual. If you do not traumatize a child in a particular way, he will be heterosexual. The nature of that trauma is an early attachment break during the bonding phase with the father.

In Bell et al’s study, more homosexual men than heterosexual men described composite pictures of their father as being detached and hostile. However, 37% of heterosexual men viewed their fathers in the same way as the homosexual men (52%) did. All studies find overlap in the two groups. Clearly, there are straight men who have the “father wound” (just ask most any Mankind Project New Warrior) and gay men who don’t. For many men and women who seek therapy or are unhappy, the reparative narrative seems to describe their experience but that narrative may not have caused their attractions to take the directions they do.
See also, Part 1, & Part 2.
–Nottebaum, L. J., Schaeffer, K. W., Rood, J., & Leffler, D. (2000). Sexual orientation—A comparison study. Manuscript submitted for publication. (Available from Kim Schaeffer, Department of Psychology, Point Loma Nazarene University, 3900 Lomaland Drive, San Diego, CA 92106)

NARTH not petitioning APAs

During his visit to London, Joseph Nicolosi touted the research supporting reparative therapy. He also said on at least one occasion that NARTH was petitioning the American Psychological Association with studies which verify the approach.
From Virtueonline:

Nicolosi said his organization – the National Association of Research and Therapy of Homosexuality (NARTH) is petitioning the American Psychiatric Association to look at the scientific data.

The BBC News quoted Nicolosi as saying:

“We have a great deal of evidence showing that these individuals are not harmed and that the therapy does work.
“We are petitioning the American Psychiatric Association to look at the scientific data.”

In this BBC News radio interview at about 2:08, Nicolosi says,

We have a great deal of evidence showing that these individuals are not harmed and that the therapy does work…We are petitioning the American Psychological association to look at the data.

It seems clear to me that the APA at issue is the psychological group and not the psychiatric assocition. I asked David Pruden, NARTH Executive Director about the specifics of this petition to the APA. He referred the question to Dean Byrd, past-president of NARTH. Dr. Byrd replied:

NARTH has no plans to petition APA on behalf of reparative therapy (or any other therapy for that matter). Dr. Nicolosi, of course, is free to do whatever he likes.
The Scientific Advisory Committee of NARTH has been working on a number of projects aimed at preserving the rights of individuals to seek psychological care for unwanted homosexual attractions as well as protecting the rights of licensed professionals to provide ethical, effective care for this client population. When these projects are completed and ready for distribution, announcements will be made via press releases on the NARTH website and through other venues.

I am not sure what form a petition would take but it would be important news if some formal research report was available which purported to support reparative therapy (in the sense Nicolosi was using in the term in London – his brand of change therapy). There are various peer-reviewed professional journal articles around which review the available research (I have done two of them) on a host of approaches to behavior and attraction change. In my opinion, those reviews do not present evidence favoring the developmentally based, reparative drive theory and therapy.