Publications by authors named "Karlijn Massar"

Weight bias internalization (WBI), the process of internalizing negative attitudes and stereotypes towards overweight individuals, significantly impacts self-worth and health behaviors, such as exercise avoidance. In the current study, we focused on the mediating role of fitness-related self-conscious emotions, particularly shame and guilt. A cross-sectional study involving 150 self-described overweight Dutch women (age M = 49.

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Background: Despite evidence on socioeconomic inequalities in psychosocial well-being of adolescents under the COVID-19 pandemic, the explanatory factors and their potential variations across contexts remained understudied. Hence, this cross-regional study compared the extent of inequalities and the mediating pathways across Hong Kong, Mainland China, and the Netherlands.

Methods: Between July 2021 and January 2022, 25 secondary schools from diverse socioeconomic background were purposively sampled from Hong Kong, Zhejiang (Mainland China), and Limburg (the Netherlands).

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The current study investigates attitudes toward one form of sex for resources: the so-called sugar relationships, which often involve exchanges of resources for sex and/or companionship. The present study examined associations among attitudes toward sugar relationships and relevant variables (e.g.

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The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset - with data collected between 2020 and 2022 - to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups.

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Antenatal care is essential to promote maternal health. Prior research has focused on barriers women face to attending antenatal care, and improving quality of care is seen as a precondition for better attendance. Digital health tools are seen as a promising instrument to increase the quality of healthcare.

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Mate value is an important concept in mate choice research although its operationalization and understanding are limited. Here, we reviewed and evaluated previously established conceptual and methodological approaches measuring mate value and presented original research using individual differences in how people view themselves as a face-valid proxy for mate value in long- and short-term contexts. In data from 41 nations (N = 3895, M = 24.

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Background: Adolescents should have access to high quality and responsive sexual and reproductive health, however, it is unclear to what extent the national policy on health and development of adolescent is implemented by health care workers in Plateau State. This study assessed the general availability of sexual and reproductive health services, the delivery of responsive adolescent sexual and reproductive health services and health care worker?s understanding of what constitutes adolescent responsive sexual and reproductive health services.

Methods: Using a cross sectional design, we interviewed 409 health care workers selected through a multistage sampling technique, across six Local Government Areas of Plateau State, Nigeria using an interviewer-administered survey questionnaire.

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We examine whether information about a female candidate's relationship history, obtained from social media profiles, affects evaluations of her suitability for a student union board position. Moreover, we investigate whether it is possible to mitigate any bias against women with multiple partners by providing information about the origins of prejudice. We utilized a 2 (relationship history: multiple vs.

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COVID-19 and the resulting measures to curb the spread of the virus have significantly changed our lives, including our nutritional choices. In this rapid scoping review an overview is provided of what psychological factors may be associated with peoples' eating behaviour during COVID-19 restrictions. Relevant literature was identified using PubMed, PsycInfo, CINAHL and MEDLINE databases from 2019 onwards.

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Social media are popular among adolescents worldwide, including the global South. The way adolescents use social media is influenced by their own perception of social media but also by how their parents use and perceive social media. This study aims to understand how Indonesian young adolescents (12-15 years old) and parents of adolescents use and perceive social media.

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Unsafe sex, particularly, condomless sex exposes adolescents to sexual and reproductive health risks. This study aimed to assess the sexual experiences and to determine the most important covariates of sexual activity and consistent condom use among adolescents in Plateau State, Nigeria. A cross sectional survey was conducted among 428 adolescents selected from 6 LGAs through a multistage sampling technique.

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This paper describes the development of a Dutch micro-intervention, , that aims to increase health behaviors among employees with a low socio-economic position (SEP), with the ultimate aim to decrease socio-economic health inequalities. Intervention Mapping (IM) was used to adapt previously developed psychological capital interventions into a micro-intervention suitable to be delivered in the work context for employees with a low socio-economic position. The first 4 steps of IM including the results of pre-testing the developed intervention program are described.

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Background: Breast cancer has become a public health concern in Indonesia. Regular breast self-examination (BSE) is considered an important first step for its early detection, especially in countries with limited healthcare access, as it is the case in Indonesia. This study aimed to confirm and assess the psychosocial determinants of intention to perform BSE and BSE performance.

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Violence exposure is associated with psychological and behavioural maladjustment in adolescents. Yet, not all adolescents exposed to violence experience negative symptoms. Resilience is an outcome that is in part determined by multiple protective factors, or developmental assets, that protect adolescents from the negative influence of encountered stressors and allow them to attain positive developmental outcomes.

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The high rate of sexual and reproductive health (SRH) challenges among adolescents in Nigeria has been linked with the poor access to and utilisation of health facilities. This study explores the factors that influence the actual use and willingness to use SRH services among adolescents. Survey questionnaires were administered to 428 adolescents aged 18 to 19 years in six local government areas (LGAs) in Plateau State.

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Introduction: Breast cancer is a global life-threatening disease. Breast self-examination (BSE) followed by timely diagnosis and treatment is a viable screening method for populations with limited health care access such as Indonesia. Knowledge of the beliefs underlying BSE could benefit the development of future health education efforts to promote BSE and breast cancer awareness among Indonesian women, with the ultimate aim to achieve early detection and promote long-term survivals.

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Purpose: In this study, we aimed to test the relationship between compulsive exercise and self-esteem, body image, and body satisfaction as potential predictors of eating disorders.

Methods: Self-report measures of compulsive exercise beliefs and behaviors, self-esteem, body image, and body satisfaction, were completed by 120 female participants through an online questionnaire. Factor analyses with varimax rotation were performed to create exercise-frequency groups.

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Unlabelled: Socioeconomic circumstances during childhood and adulthood are known to negatively affect health promoting behaviors. On the other hand, psychological capital (PsyCap) and health literacy are positively associated with these lifestyle behaviors. We, therefore, reasoned that PsyCap and health literacy might "buffer" the negative influences of socioeconomic circumstances on health-promoting behaviors.

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It is widely recognised that high quality antenatal care is a key element in maternal healthcare. Tanzania has a very high maternal mortality ratio of 524 maternal deaths per 100,000 live births. Most maternal deaths are due to preventable causes that can be detected during pregnancy, and antenatal care therefore plays an important role in reducing maternal morbidity and mortality.

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To assess the availability, accessibility, appropriateness and quality of adolescent sexual and reproductive health (ASRH) services in primary health care (PHC) facilities in Plateau State, Nigeria, a cross-sectional study was conducted in 230 PHC facilities across the three senatorial zones of Plateau state. Primary data were obtained through face-to-face interviews with heads of facilities from December 2018 to May 2019. An adapted questionnaire from the World Health Organization (WHO) was used, covering five domains, to ascertain the extent that ASRH services were available and provided.

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Objective: The main aim of the current study was to investigate what role perceived life stress, psychological capital (PsyCap), financial self-reliance and time perspective orientations play in explaining socioeconomic health inequalities, specifically self-perceived health and self-reported physical health conditions.

Methods: Individuals (total n = 600) aged 16+ years from a general Dutch population sample (LISS panel) completed an online questionnaire measuring three different SEP indicators (highest achieved educational level, personal monthly disposable income and being in paid employment), perceived life stress, PsyCap, financial self-reliance, time perspective, self-perceived health, and self-reported physical health conditions. Structural equation modelling using a cross-sectional design was used to test the mediation paths from SEP indicators to self-perceived health and self-reported physical health conditions through perceived life stress, PsyCap, financial self-reliance and time perspective orientations.

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Objective: Early presentation with breast cancer symptoms is crucial to the effectiveness of treatment and the affected women's long-term survival. However, in Indonesia, 60-70% of breast cancer patients first present themselves to the hospital in an advanced stage. Knowledge about the determinants of breast cancer early presentation could inform efforts to promote healthcare seeking at earlier symptomatic stages.

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Adolescents in Panama face multiple barriers that affect their health, such as high rates of teenage pregnancy, increased human immunodeficiency virus (HIV) infections and sexual violence. Equal relationships between women and men are likely to reduce such risks. Here, we suggest that the school-based enhancement of Social and Emotional Learning core competencies-awareness of self and others, positive attitudes and values, responsible decision-making, and social interaction skills-could foster positive changes in behaviors between boys and girls, specifically through a focus on equal roles, equal rights in relationships and nonviolent problem solving.

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