Body fat and muscularity dissatisfaction are not prospectively associated with psychological wellbeing among sexual minority men: A case for separating within- and between-person variation in examinations of body image phenomena and their outcomes.

Extensive cross-sectional research reports that body fat and muscularity dissatisfaction contribute to negative psychological outcomes among sexual minority men; however, longitudinal models are necessary for accurately quantifying the strength and direction of these relationships. We investigated the bidirectional longitudinal relationships of body fat and muscularity dissatisfaction with psychological quality of life among 2953 sexual minority men using random intercept cross-lagged panel models. Consistent with existing literature, we found that higher average muscularity and body fat dissatisfaction were associated with higher average psychological quality of life impairment between-persons.

Examination of bidirectional relationships between fear of negative evaluation and weight/shape concerns over 3 years: A longitudinal cohort study of Australian adolescents.

Objective: Adolescents commonly experience both fear of negative evaluation and weight/shape concerns. However, evidence concerning the prospective associations between these constructs during adolescence is limited. The current study examined the bidirectional relationships between fear of negative evaluation and weight/shape concerns over a 3-year period in adolescents.

Aboriginal and/or Torres Strait Islander women's body image: A qualitative study.

Aboriginal and/or Torres Strait Islander peoples refer to the traditional owners of Australia and have the oldest continuing culture in the world. Body image has scarcely been investigated among adult Aboriginal and/or Torres Strait Islander (Indigenous) women, despite evidence that racism and colourism broadly contribute to adverse psychological outcomes for this population. Therefore, we conducted a qualitative study investigating Indigenous womens' body image with specific focus on racism, colourism, and cultural identity.

Fat is feminine: A qualitative study of how weight stigma is constructed among sexual minority men who use Grindr.

Why is weight stigma so potent among sexual minority men? We propose that sexual minority men may be more vulnerable to weight stigma because of factors not captured by existing measures - for instance, men's perception of fatness as less masculine and/or more feminine. To investigate, we qualitatively examined how 17 sexual minority men (M = 28.52, SD = 1.

"Spring is the best time to lose weight": Evidence that dieting is seasonal and reaches peak intensity during Spring.

Does dieting intensify during Spring? Previous research suggests that body dissatisfaction is seasonal and peaks during Summer. Extending these findings to seasonal dieting, we contend that individuals' apprehensions about heightened Summertime body dissatisfaction motivate Springtime dieting. To detect seasonal dieting, we examined the seasonal frequencies of 69 dieting hashtags within a database of 564 million tweets originating from the United States and spanning eight calendar years (2012-19).

Global urban environmental change drives adaptation in white clover.

Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors.

Australian women's motivations for, and experiences of, cosmetic surgery: A qualitative investigation.

Little qualitative literature has examined women's motivations for undergoing cosmetic surgery or their experiences throughout the surgery process (e.g., consultation, aftercare, and recovery).

Critical measurement issues in the assessment of social media influence on body image.

Progress towards understanding how social media impacts body image hinges on the use of appropriate measurement tools and methodologies. This review provides an overview of common (qualitative, self-report survey, lab-based experiments) and emerging (momentary assessment, computational) methodological approaches to the exploration of the impact of social media on body image. The potential of these methodologies is detailed, with examples illustrating current use as well as opportunities for expansion.

Weight stigma predicts reduced psychological wellbeing and weight gain among sexual minority men: A 12-month longitudinal cohort study using random intercept cross-lagged panel models.

Weight stigma among sexual minority men predicts negative health outcomes; however, existing research is cross-sectional. Therefore, we longitudinally examined the presence, strength, and direction of relationships between weight stigma and health outcomes in a multi-national cohort of 2953 sexual minority men (M = 37.70, SD = 13.

Androgen abuse among gay and bisexual men.

Purpose Of Review: Androgen abuse is more prevalent among gay and bisexual (i.e. sexual minority) men than heterosexual men.

The Impact of Transitions, a Mental Health Literacy Intervention With Embedded Life Skills for Postsecondary Students: Preliminary Findings From a Naturalistic Cohort Study.

Objective: Mental illness is a common medical condition to onset during adolescence. Young people who leave for postsecondary life are at an especially challenging period of lifetime when many will leave home and familiar environments for prolonged periods of time. These new circumstances may put young people at risk of developing mental health problems or disorders or exacerbate existing mental disorders.

Beach body ready? Shredding for summer? A first look at "seasonal body image".

We introduce the term "seasonal body image" to refer to within-person variation in body image that occurs across the Gregorian seasons of Spring, Summer, Autumn, and Winter. Herein, we (i) quantified and visualised seasonal body image and its mechanisms, and (ii) identified individual predictors of seasonal body image. Sexual minority men (N = 823) residing in the Northern Hemisphere (n = 659) and Southern Hemisphere (n = 164) provided cross-sectional data about their experiences of body image phenomena in Spring, Summer, Autumn, and Winter.

Differences in weight stigma between gay, bisexual, and heterosexual men.

Gay and bisexual men may experience more weight stigma than heterosexual men; however, research is limited. We examined differences in experienced weight discrimination, weight bias, and internalized weight bias in two studies: the first comprising gay (n = 351), bisexual (n = 357), and heterosexual (n = 408) men, and the second comprising gay (n = 614) and bisexual (n = 123) men. In Study 1, bisexual men reported experiencing more weight discrimination than gay (r = .

Why do men stigmatize individuals with eating disorders more than women? Experimental evidence that sex differences in conformity to gender norms, not biological sex, drive eating disorders' stigmatization.

Previous research has shown that men are more stigmatizing than women toward individuals with eating disorders, including anorexia nervosa and muscle dysmorphia. We hypothesized that previously observed sex differences in eating disorders' stigmatization are driven by sex differences in individuals' levels of conformity to masculine and feminine gender norms. Young adults ( = 545) completed validated measures of conformity to masculine and feminine norms and were then randomly assigned to read a character description of a male or female individual with anorexia or muscle dysmorphia.

On the ecological significance of pollen color: a case study in American trout lily (Erythronium americanum).

Evolutionary ecologists seek to explain the processes that maintain variation within populations. In plants, petal color variation can affect pollinator visitation, environmental tolerance, and herbivore deterrence. Variation in sexual organs may similarly affect plant performance.

Using a Music Video Parody to Promote Breastfeeding and Increase Comfort Levels Among Young Adults.

Background: North Americans are not meeting the World Health Organization's breastfeeding recommendations. Young adults understand that breastfeeding is healthy but are uncomfortable seeing breastfeeding. Research aim: The aim of the current project was to determine if a music video parody promoting breastfeeding is perceived by young adults to be an effective means of promotion and if exposure to such a video could increase comfort levels.

Explaining the apparent paradox of persistent selection for early flowering.

Decades of observation in natural plant populations have revealed pervasive phenotypic selection for early flowering onset. This consistent pattern seems at odds with life-history theory, which predicts stabilizing selection on age and size at reproduction. Why is selection for later flowering rare? Moreover, extensive evidence demonstrates that flowering time can and does evolve.

Photoinactivation of Photosystem II in Prochlorococcus and Synechococcus.

The marine picocyanobacteria Synechococcus and Prochlorococcus numerically dominate open ocean phytoplankton. Although evolutionarily related they are ecologically distinct, with different strategies to harvest, manage and exploit light. We grew representative strains of Synechococcus and Prochlorococcus and tracked their susceptibility to photoinactivation of Photosystem II under a range of light levels.

Using breastfeeding images to promote breastfeeding among young adults.

Young adults' reactions to breastfeeding images were assessed using varied approaches. In Study 1, participants viewed posters from a breastfeeding campaign; many anticipated negative reaction to the campaign. In Study 2, participants viewed novel infant-feeding posters; breastfeeding posters were viewed for less time than bottle-feeding posters, regardless of the task assigned.

Estimating selection through male fitness: three complementary methods illuminate the nature and causes of selection on flowering time.

Our understanding of selection through male fitness is limited by the resource demands and indirect nature of the best available genetic techniques. Applying complementary, independent approaches to this problem can help clarify evolution through male function. We applied three methods to estimate selection on flowering time through male fitness in experimental populations of the annual plant Brassica rapa: (i) an analysis of mating opportunity based on flower production schedules, (ii) genetic paternity analysis, and (iii) a novel approach based on principles of experimental evolution.

The causes of selection on flowering time through male fitness in a hermaphroditic annual plant.

Flowering is a key life-history event whose timing almost certainly affects both male and female fitness, but tests of selection on flowering time through male fitness are few. Such selection may arise from direct effects of flowering time, and indirect effects through covariance between flowering time and the environment experienced during reproduction. To isolate these intrinsically correlated associations, we staggered planting dates of Brassica rapa families with known flowering times, creating populations in which age at flowering (i.

What drives selection on flowering time? An experimental manipulation of the inherent correlation between genotype and environment.

The optimal timing of the seasonal switch from somatic growth to reproduction can depend on an individual's condition at reproduction, the quality of the environment in which it will reproduce, or both. In annual plants, vegetative size (a function of age at flowering) affects resources available for seed production, whereas exposure to mutualists, antagonists, and abiotic stresses in the environment (functions of Julian date of flowering) influences success in converting resources into offspring. The inherent tight correlation between age, size, and environment obscures their independent fitness contributions.