Since cognitive abilities have been shown to decrease with age, it is expected that older physicians would not perform as well as their younger counterparts on clinical cases unless their expertise can counteract the cognitive effects of aging. However, studies on the topic have shown contradictory results. This study aimed to further investigate…

The extent to which people choose their professions and professions choose their practitioners is not always clear; it is in all likelihood a "simpatico" process. But, growing attention to the study of careers can help elucidate the nexus of personal and professional forces that underpins this complex dynamic. This line of inquiry can…

Does expertise within a domain of knowledge predict accurate self-assessment of the ability to explain topics in that domain? We find that expertise increases confidence in the ability to explain a wide variety of phenomena. However, this confidence is unwarranted; after actually offering full explanations, people are surprised by the limitations…

This paper addresses how twenty-first century learning cultures can be enabled and spread in the Singapore school system by enacting curricular innovations and developing teachers' capacity for adaptivity. We appropriate understandings of adaptivity, including adaptive expertise, and contextualize it to the Singapore school system at the…

In this plenary I reflect on the research I have shared over the past many years of participating and presenting in PME and PME-NA conferences to identify three intellectual divides that continually challenge and motivate my scholarship. I discuss how these intellectual borders (mathematics/education; expert/novice; research/teaching) create…

In this exploratory study we considered how one teacher's understanding of proportional reasoning related to his teaching. We used Epistemic Network Analysis to consider the teachers' knowledge organization and connections between knowledge resources as a way to make sense of his understanding. Then, we examined how his understanding was reflected…

This paper has two key aims. First, it examines the authors' attempts to use knowledge creation activity as a way of developing evidence-informed practice amongst a learning community of 36 early years practitioners in Camden, London. Second, it illustrates how the authors approached the idea of measuring evidence use and our engagement with two…

Clinicians' purposeful improvement of practice is vital to maintaining excellence in patient care. This activity is understood as a core competency of adaptive expertise. As part of a broader program of research exploring adaptive expertise in healthcare, this study explored purposeful improvement in paediatric minimally invasive surgery. A…

Although international definitions of early childhood repeatedly refer to a birth-8 age span, there are complex, institutional divides within this age range. This paper explores the divide between pre-compulsory and compulsory early childhood institutions. In countries such as Finland this divide is not such an issue because children do not begin…

An independent validation was conducted of the Utah Autism and Developmental Disabilities Monitoring Network's (UT-ADDM) classification of children with autism spectrum disorder (ASD). UT-ADDM final case status (n = 90) was compared with final case status as determined by independent external expert reviewers (EERs). Inter-rater reliability…

In public education, procurement reform has been all but ignored in policy discussions and procurement policies have remained virtually untouched. But the high price of ignoring procurement is becoming clear to people trying to reform education on the ground. Often involving long, cumbersome processes and risk-averse central office cultures,…

This article explores how personal professional theories (PPTs) develop. PPT development of nine junior accountants and nine novice teachers was monitored by repeated measurements over a period of 1.5 years, from the last year of vocational education until the second year of their professional careers. Computer-supported construction of PPT…

This article describes an exploratory mixed method convergent parallel design study conducted to examine Connecticut Educational Leadership Preparation programs for the existence of mental health content in course work and field experiences to learn the extent to which preservice school leaders are being exposed to mental health content in their…

Recognizing the importance of designing educational opportunities that draw upon students' prior knowledge and experiences, this paper uses focus groups to explore how Spanish-speaking students in a graduate program at the University of Kansas (KU) in Lawrence understand academic information literacy practices within their new cultural contexts.…

This study examines Finnish apprenticeship training stakeholders' perceptions of vocational expertise and experiences of workplace learning and guidance. The semi-structured interview data was collected in 2015 in two vocational fields: the social and health care services sector (five workplaces) and the technology sector (five workplaces). The…