There is a longstanding debate on whether the analysis of covariance (ANCOVA) or the change score approach is more appropriate when analyzing non-experimental longitudinal data. In this article, we use a structural modeling perspective to clarify that the ANCOVA approach is based on the assumption that all relevant covariates are measured (i.e.,…

Teaching economic history requires the study of how to combine the economists' modeling and statistical methods with the methods used by historians and the other social sciences. It often involves learning how to search for quantitative data from a variety of sources and then building panel datasets that match the data found with existing…

The causal mediation literature has developed techniques to assess the sensitivity of an inference to pretreatment confounding, but these techniques are limited to the case of a single mediator. In this article, we extend sensitivity analysis to possible violations of pretreatment confounding in the case of multiple mediators. In particular, we…

"The Times They Are a-Changin'" says the old Bob Dylan song. But it is not just the times that are a-changin'. For statistical literacy, the very earth is moving under our feet (apologies to Carole King). The seismic forces are (i) new forms of communication and discourse and (ii) new forms of data, data display and human interaction…

Current issues in the use of peer assessment techniques and sociometric methods are discussed. Attention is paid to the contributions of the four articles in this volume. Together these contributions point to the continual level of change and progress in these techniques. They also show that the paradigm underlying these methods has been unchanged…

Josh Reid and Colin Carmichael describe how some Year 6 children have developed their understanding of mathematics by studying Asian countries. The statistical analyses undertaken by these children appears to have strengthened their understanding of statistical concepts and at the same time provided them with tools for understanding complex…

Engaging undergraduates in the environmental consequences of fossil fuel usage primes them to consider their own anthropogenic impact, and the benefits and trade-offs of converting to renewable fuel strategies. This laboratory activity explores the potential contaminants (both inorganic and organic) present in the raw fuel and solid waste…

The potential of social media to give insight into the dynamic evolution of public conversations, and into their reactive and constitutive role in political activities, has to date been underdeveloped. While topic modeling can give static insight into the structure of a conversation, and keyword volume tracking can show how engagement with a…

Applying the Strategic Relational Approach, this paper analyses the circumstances behind and educators' strategies in response to education reforms in two nation-states undergoing socio-political transformation--Bolivia and Timor-Leste. Despite the starkly different histories and contemporary context of each nation, we suggest that transformation…

After decades of dedicated investment, state funding to assist local California school districts in the construction, modernization, and maintenance of their school facilities has come to a halt. As the Governor, the legislature, and other stakeholders debate the future of the state's K-12 school facility funding role, a big unknown exists:…

In England, early years education services and the children and who attend them are the subject of increasing scrutiny and assessment. While these assessments offer a number of benefits in terms of tracking child development and ensuring the efficient use of public monies, they also impose restrictions to practice, limits to understandings of…

The definition of educator effectiveness is being redefined by econometric modeling to evidence student achievement on standardized tests. While the reasons that econometric frameworks are in vogue are many, it is clear that the strength of such models lie in the quantifiable evidence of student learning. Current accountability models frame…

According to the 2001 Census, there has been a substantial increase in the numbers of Welsh speakers aged 5-15 years, especially in south-east Wales. It is generally accepted that this increase can be largely attributed to the success of Welsh-medium education. Indeed, Welsh-medium education has long been seen as an effective language planning…

If data exhibit multidimensionality, key conditional independence assumptions of unidimensional models do not hold. The current work pursues posterior predictive model checking, a flexible family of model-checking procedures, as a tool for criticizing models due to unaccounted for dimensions in the context of item response theory. Factors…

A person's sense of dignity is a complex phenomenon and is intertwined with their sense of feeling human and being respected as a human being. In 2010, the School of Health and Social Care developed a collaborative lifeworld led transprofessional curriculum for health and social work disciplines harnessing technology to connect learners to a wider…