Friends are a vital source of social relations throughout the lifespan and across developmental stages. Our knowledge of how friendships develop over time, especially from childhood through adulthood, is limited. Furthermore, it is now recognized that this specific type of relationship influences health across the life course in unique ways. Using…

In a national survey of U.S. adults, the number of close friends increased with age and 76% reported having three or more. However, 8% reported having none. There are limited parallel data for gifted learners but the survey provided an opportunity to compare the two groups. The numbers of close friends for gifted learners appears to increase from…

The rapid growth of social media platforms has reshaped various facets of life, including education. Instagram, primarily an audio-visual content-sharing platform, is increasingly being perceived as a potential learning tool. This study explores the usage and perception of Instagram as an educational tool, focusing on its role in engagement and…

Police officers are often trained to use the Behavior Analysis Interview (BAI) to detect deceit, but it is based on faulty indicators of lying that may be especially problematic for juveniles due to developmental immaturities. Juveniles, young adults, and adults were assigned to guilt or innocence conditions, read a criminal scenario, and…

Spinal alignment can be assessed without radiation using three-dimensional ultrasound imaging (3DUS). Reliable measurements could inform the ideal arm position for scoliosis radiographs. This study determined the inter-evaluator reliability of axial vertebral rotation (AVR) measurements and sagittal curve angles in healthy females from 3DUS spinal…

Despite high rates of mental health concerns among youth, they are unlikely to receive mental health care, with mental health stigma acting as a barrier. The present study explores youth perceptions of the influences of stigma and what should be done to address it, drawing on a large (n = 705) mixed methods dataset of youth aged 14 to 24 from the…

Regular evaluation of environmental education is important for quality assurance and the self-assessment of educational institutions such as zoos. However, capacity is often lacking. Therefore, this study presents instruments that can be used to track the impact of educational programs on connection to nature, interest in species conservation,…

In living history museums, where young people work and volunteer as historically dressed interpreters, participate in field trips, and attend summer camps, young people can simultaneously represent the past, the present and the future. In these spaces, they also shape the past through their questions, their retellings, and their reimaginings based…

Adolescents and young adults living with chronic illness experience more complications and challenges when transitioning to adult-oriented care. Despite various interventions to support medication management, goal setting, and collaboration with care teams, AYAs continue to struggle, affecting their health and life outcomes. In this dissertation,…

This study investigated the relationship between Foreign Language Enjoyment (FLE), Foreign Language Classroom Anxiety (FLCA), Out-of-Class Foreign Language Use (OCFLU) and learner factors (FL and FL proficiency level). Participants were 611 foreign language (FL) learners aged 16-72 at Spanish Official Language Schools. An online questionnaire was…

Couch hopping is a significant feature of youth homelessness in the United States. Every year, half of youth ages 18 to 25 who experience housing instability report couch hopping--also known as couch surfing or doubling up. Emerging work suggests that in some intergenerational informal hosting arrangements, youth and their adult hosts can form…

Education in science, technology, engineering, and mathematics (STEM) is essential to achieving continued technological advancement. The most critical years for instilling knowledge are during childhood, and a strategic way to accomplish this is through playful materials. Therefore, there is a need to develop more inclusive solutions to achieve…

This study examines the relationship between parenting styles (authoritarian, indulgent, authoritative, and neglectful) and its relations with personal and social adjustment beyond adolescence. Participants were 2131 Spanish children, divided into adolescents (n = 616), young adults (n = 606), middle-aged adults (n = 502) and older adults (n…

Autism significantly impacts how individuals interact, communicate and perceive the world. Gastrointestinal disturbances, particularly constipation, are prevalent among autistic people, affecting their overall well-being. However, to the best of our knowledge, no specific guidelines are currently available regarding the diagnosis of constipation…

Developmental science suggests that the consequences of mental health problems for life-course outcomes may depend on the timing of their onset. This study investigated the extent to which mental health predicted educational attainment at ages 17, 20, and 25 and whether gender moderated the links between mental health and educational attainment.…