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We examined whether heterosexual individuals’ self-reported sexual orientation could be influenced experimentally by manipulating their knowledge of the nature of sexual orientation. In Study 1 (180 university students, 66% female) participants read summaries describing evidence for sexual orientation existing on a continuum versus discrete categories or a control manipulation, and in Study 2 (460 participants in a nationally representative Qualtrics panel, 50% female) additionally read summaries describing sexual orientation as fluid versus stable across the life-course. After reading summaries, participants answered various questions about their sexual orientation. In Study 1, political moderates and progressives (but not conservatives) who read the continuous manipulation subsequently reported being less exclusively heterosexual, and regardless of political alignment, participants reported less certainty about their sexual orientation, relative to controls. In Study 2, after exposure to fluid or continuous manipulations heterosexual participants were up to five times more likely than controls to rate themselves as non-exclusively heterosexual. Additionally, those in the continuous condition reported less certainty about their sexual orientation and were more willing to engage in future same-sex sexual experiences, than those in the control condition. These results suggest that non-traditional theories of sexual orientation can lead heterosexuals to embrace less exclusive heterosexual orientations.

Some nonheterosexual individuals are eschewing lesbian/gay and bisexual identities for queer and pansexual identities. The present study aimed to examine the sexual and demographic characteristics of nonheterosexual individuals who adopt these labels. A convenience sample of 2,220 nonheterosexual (1,459 lesbian/gay, 413 bisexual, 168 queer, 146 pansexual, and 34 other \"write-in\") individuals were recruited for a cross-sectional online survey. In support of our hypotheses, those adopting pansexual identities were younger than those adopting lesbian, gay, and bisexual identities, and those adopting queer and pansexual identities were more likely to be noncisgender than cisgender, and more likely to be cisgender women than men. The majority of pansexual individuals demonstrated sexual orientation indices within the bisexual range, and showed equivalent patterns of sexual attraction, romantic attraction, sexual behavior, and partner gender as bisexual-identified men and women. In contrast, three-quarters of queer men, and more than half of queer women, reported sexual attraction in the homosexual range. This study found that rather than a general movement toward nontraditional sexual identities, queer and pansexual identities appear most appealing to nonheterosexual women and noncisgender individuals. These findings contribute important information regarding who adopts queer and pansexual identities in contemporary sexual minority populations.

Social gender transition is an increasingly accepted intervention for gender variant children and adolescents. To date, there is scant literature comparing the mental health of children and adolescents diagnosed with gender dysphoria who have socially transitioned versus those who are still living in their birth-assigned gender. We examined the mental health of children and adolescents referred to the Gender Identity Development Service (GIDS), a specialist clinic in London, UK, who had socially transitioned (i.e., were living in their affirmed gender and/or had changed their name) versus those who had not socially transitioned. Referrals to the GIDS were aged 4–17 years. We assessed mental health correlates of living in one’s affirmed gender among 288 children and adolescents (208 birth-assigned female; 210 socially transitioned) and of name change in 357 children and adolescents (253 birth-assigned female; 214 name change). The presence or absence of mood and anxiety difficulties and past suicide attempts were clinician rated. Living in role and name change were more prevalent in birth-assigned females versus birth-assigned males. Overall, there were no significant effects of social transition or name change on mental health status. These findings identify the need for more research to understand how social transition influences mental health, including longitudinal studies that allow for more confident inferences to be made regarding the relationship between social transition and mental health in young people with gender dysphoria.

Research has found that sexual orientation beliefs predict heterosexuals’ attitudes toward sexual minorities, and important sexual identity outcomes in sexual minority populations. To this point, no studies have systematically examined how sexual orientation beliefs may be associated with sexual identity self-labeling among sexual minority individuals. The present study examined this question in a sample of 1840 same-gender attracted individuals recruited for a cross-sectional online survey. Beliefs in the naturalness and discreteness of sexual orientation categories were highest in gay/lesbian individuals, intermediate in bisexual people, and lower in queer and pansexual individuals. Beliefs in the importance of sexual orientation were highest in gay/lesbian and queer identified individuals and lower in bisexual people. Within-group analysis demonstrated that gay/lesbian individuals who reported more exclusive same-gender attraction reported higher naturalness, discreteness, and importance beliefs than those with less-exclusive same-gender attraction. However, naturalness, discreteness, and importance beliefs were not associated with sexual attraction patterns in bisexual individuals. Finally, among predominately same-gender attracted populations, the adoption of a queer identity (over a gay/lesbian identity) was predicted by lower naturalness and discreteness beliefs, and increased perceived importance in females. Among non-monosexual populations, adoption of a pansexual identity over a bisexual identity was predicted by lower naturalness beliefs in females, but not predicted by sexual orientation beliefs in males. Collectively, these findings suggest that sexual orientation beliefs differ between sexual identity groups and may partly explain the adoption of particular sexual identity labels among contemporary sexual minority populations.

When explaining the causes of human behavior, genes are often given a special status. They are thought to relate to an intrinsic human ‘essence’, and essentialist biases have been shown to skew the way in which causation is assessed. Causal reasoning in general is subject to other pre-existing biases, including beliefs about normativity and morality. In this synthesis we show how factors which influence causal reasoning can be mapped to a framework of genetic essentialism, which reveals both the shared and unique factors underpinning biases in causal reasoning and genetic essentialism. This comparison identifies overlooked areas of research which could provide fruitful investigation, such as whether normative assessments of behaviors influence the way that genetic causes are ascribed or endorsed. We also outline the importance of distinguishing reasoning processes regarding genetic causal influences on one’s self versus others, as different cognitive processes and biases are likely to be at play.

Past visual attention research appears to show that bisexual men and women view erotic images differently compared to heterosexual and gay/lesbian men and women. However, none of these studies have employed analytic approaches required to determine whether these apparent bisexual viewing patterns are due to averaging together heterosexual and gay/lesbian type viewing patterns, or rather are because bisexual-identified individuals possess unique viewing patterns which are distinct from heterosexual and gay/lesbian individuals. In the current eye-tracking study, we aimed to address this question. Visual attention of 60 men (24 heterosexual, 19 gay, 17 bisexual) and 54 women (21 heterosexual, 10 lesbian, 23 bisexual) was tracked, while they viewed erotic images of nude men and women. Applying analytic approaches capable of detecting bisexual responding revealed that bisexual men, but not bisexual women, had a unique bisexual controlled attention pattern, and that neither bisexual men nor women demonstrated a unique bisexual pattern of initial attention. Our findings provide mixed evidence for a unique bisexual attentional profile in men and women.

Individuals who report mostly heterosexual orientations (i.e., mostly sexually attracted to the opposite sex, but occasionally attracted to the same sex) outnumber all other non-heterosexual individuals combined. The present study examined whether mostly heterosexual men and women view same- and other-sex sexual stimuli differently than exclusively heterosexual men and women. A novel eye-tracking paradigm was used with 162 mostly and exclusively heterosexual men and women. Compared to exclusively heterosexual men, mostly heterosexual men demonstrated greater attention to sexually explicit features (i.e., genital regions and genital contact regions) of solo male and male–male erotic stimuli, while demonstrating equivalent attention to sexually explicit features of solo female and female–female erotic stimuli. Mediation analyses suggested that differences between mostly and exclusively heterosexual profiles in men could be explained by mostly heterosexual men’s increased sexual attraction to solo male erotica, and their increased sexual attraction and reduced disgust to the male–male erotica. No comparable differences in attention were observed between mostly and exclusively heterosexual women—although mostly heterosexual women did demonstrate greater fixation on visual erotica overall—a pattern of response that was found to be mediated by reduced disgust.

The low evolutionary rate of mitochondrial genes in Anthozoa has challenged their utility for phylogenetic and systematic purposes, especially for DNA barcoding. However, the evolutionary rate of Ceriantharia, one of the most enigmatic \"orders\" within Anthozoa, has never been specifically examined. In this study, the divergence of mitochondrial DNA of Ceriantharia was compared to members of other Anthozoa and Medusozoa groups. In addition, nuclear markers were used to check the relative phylogenetic position of Ceriantharia in relation to other Cnidaria members. The results demonstrated a pattern of divergence of mitochondrial DNA completely different from those estimated for other anthozoans, and phylogenetic analyses indicate that Ceriantharia is not included within hexacorallians in most performed analyses. Thus, we propose that the Ceriantharia should be addressed as a separate clade.

There is increased acceptance of gay men in most Western societies. Nevertheless, evidence suggests that feminine-presenting gay men are still disadvantaged compared to gay men who present in a more traditionally masculine way. Though gay men themselves may be complicit in perpetuating this bias, studies that demonstrate this possibility are scant. Whereas most studies on perceptions of feminine-presenting gay men have manipulated gender nonconformity via written descriptions, research suggests that behavioural cues such as voice and body-language can mitigate or exacerbate prejudice toward a stereotyped individual. In the current study, audio-visual stimuli were created to investigate how masculine versus feminine behaviour would impact status endowment from other gay and heterosexual men. In total, 256 men (Mage = 42.73, SD = 14.48: half gay; half heterosexual) cast, from a selection of six video-taped candidates, one gay man to play a lead role in a purported ad for a tourism campaign. In the videos, the actors delivered a script related to the tourism campaign in a manner where their voice and body-language was manipulated to come across as either masculine or feminine-presenting. Findings indicated that gay and heterosexual participants showed a significant preference for the masculine videoclips. For heterosexual men, the preference for masculine-presenting actors was predicted by greater anti-gay sentiment, whereas internalised anti-gay prejudice did not predict a preference for masculine-presentation among gay men. Implications of the findings for discourse and education on intraminority prejudice and suggestions for future research are offered.

Plants contain more genes encoding core cell cycle regulators than other organisms but it is unclear whether these represent distinct functions. D-type cyclins (CYCD) play key roles in the G1-to-S-phase transition, and Arabidopsis (Arabidopsis thaliana) contains 10 CYCD genes in seven defined subgroups, six of which are conserved in rice (Oryza sativa). Here, we identify 22 CYCD genes in the poplar (Populus trichocarpa) genome and confirm that these six CYCD subgroups are conserved across higher plants, suggesting subgroup-specific functions. Different subgroups show gene number increases, with CYCD3 having three members in Arabidopsis, six in poplar, and a single representative in rice. All three species contain a single CYCD7 gene. Despite low overall sequence homology, we find remarkable conservation of intron/exon boundaries, because in most CYCD genes of plants and mammals, the first exon ends in the conserved cyclin signature. Only CYCD3 genes contain the complete cyclin box in a single exon, and this structure is conserved across angiosperms, again suggesting an early origin for the subgroup. The single CYCD gene of moss has a gene structure closely related to those of higher plants, sharing an identical exon/intron structure with several higher plant subgroups. However, green algae have CYCD genes structurally unrelated to higher plants. Conservation is also observed in the location of potential cyclin-dependent kinase phosphorylation sites within CYCD proteins. Subgroup structure is supported by conserved regulatory elements, particularly in the eudicot species, including conserved E2F regulatory sites within CYCD3 promoters. Global expression correlation analysis further supports distinct expression patterns for CYCD subgroups.