Maximum Likelihood Dynamic Factor Modeling for Arbitrary N and T Using SEM

This article has 3 objectives that build on each other. First, we demonstrate how to obtain maximum likelihood estimates for dynamic factor models (the direct autoregressive factor score model) with arbitrary T and N by means of structural equation modeling (SEM) and compare the approach to existing methods. Second, we go beyond standard time series analysis (T large and N = 1) and conventional SEM (N large and T = 1 or small) by integrating both approaches. The resulting combined model offers a variety of new modeling options including a direct test of the ergodicity hypothesis, according to which the factorial structure of an individual observed at many time points is identical to the factorial structure of a group of individuals observed at a single point in time. Third, we illustrate the flexibility of SEM time series modeling by extending the approach to account for complex error structures. We end with a discussion of current limitations and future applications of SEM-based time series modeling for arbitrary T and N.     

Teacher reflection: the development of a typology

In this article, a contribution is made to the discussion of reflection on the part of teachers. The discussion to date has shown that reflection must be broad and deep. However, just what constitutes broad and deep reflection and the relations between the two remain unclear. After consideration of the characteristics of broad and deep reflection, three domains of broad reflection are distinguished (i.e. the pragmatic, ethical and moral domains). Closed versus open approaches to deep reflection are also then distinguished which produces a typology of six reflection possibilities. Empirical support for this typology was gathered via interviews with 11 experienced secondary school teachers. The content of the interviews addressed actual difficult decision situations which the teachers had experienced, and application of the constant comparative method showed the teachers to indeed use the six reflection possibilities when they reflected upon the difficult decision situations. A clear preference for closed types of pragmatic and ethical reflection over open or moral reflection was shown. The conclusion is that the proposed typology can be used to map teacher reflection. The results further suggest that the breadth and depth of teacher reflection are in need of development and that the relations between teacher reflection and their professional behaviour should be examined in greater detail.     

Has schooling of ADHD students reached a crossroads?

ABSTRACT

The aim of the present study was to examine and describe educational leaders’ mindset types related to schooling of students with ADHD in five municipalities with ADHD special education classes and in five pair-matched municipalities without such classes. Selection of the ten municipalities was based on the results from a nationwide survey (response rate 76%) aimed at investigating how Swedish municipalities organise schooling for ADHD students. Interview data was analysed with the use of a theoretical framework presented as a typology table describing mindsets more or less in line with either the neuropsychiatric paradigm or inclusion. The perceived neuropsychiatric influence on ADHD students’ schooling seemed to affect educational leaders’ decision making, leading to different schooling for ADHD students in different municipalities. The findings, presented as municipality profiles, are discussed in relation to the notion of inclusive education and alternative educational paths leading either towards inclusion or exclusion.     

Moral relations in encounters with nature

The overall aim of this article is to develop in-depth knowledge about the connection between outdoor experiences and moral attitudes towards nature. The study focuses on processes in which moral relations are at stake in encounters between students and nature. The purpose is to identify such events, describe their specific circumstances and clarify how moral relations are established in these events. The empirical material consists of video-recordings of activities in three different outdoor education practices. In order to identify and categorise moral situations, an analytical tool called the ethical tendency is used. This tool is based on Wittgenstein’s language game method. The findings show that in the investigated outdoor education practices, moral relations towards nature are established in several different ways. The article concludes with four educational implications: responsibility when dealing with moral reactions; bringing ethical questions to the fore; different educational conditions create different encounters with nature; and the consequences of different language games.     

‘Needle and Stick’ save the world: sustainable development and the universal child

This text deals with a problem concerning processes of the productive power of knowledge. We draw on the so-called poststructural theories challenging the classical image of thought – as hinged upon a representational logic identifying entities in a rigid sense – when formulating a problem concerning the gap between knowledge and the object of knowledge. More specifically we are looking at this problem in the contexts of sustainable development and childhood, using illustrating examples in order to test the validity of these theoretical accounts. The examples we use range from internationally agreed documents claiming universality concerning environmental protection and childhood to national curricula for the pre-school to a Swedish governmentally produced and distributed TV series called Needle and Stick save the world, addressing the issue of sustainable development. In short, we wish to problematise the rigid positions of the child and the human being in relation to nature.     

Effects of competition,exercise, and mental stress on secretory immunity

It has been suggested that the psychological stress associated with competitive sports events may help to explain the increased susceptibility to respiratory infections due to reductions in secretory immunity. In the current study, we investigated the influence of competitive exercise and psychological stress on secretory immunoglobulin A (s-IgA). Salivary s-IgA and heart rate were measured in 62 healthy young recreationally active men at rest and, in a between-subjects design, following one of four 8-min tasks: mental arithmetic, cycling at workloads of 60 to 180?W (mean = 146?W), mental arithmetic while cycling, or competitive cycling. Mental arithmetic was associated with significant increases in s-IgA concentration (mean = 49?μg?·?min^?1) and s-IgA secretion rate (mean = 25?μg?·?ml^?1) compared with rest, while mental arithmetic combined with exercise was associated with a significant increase in s-IgA concentration only (mean = 124?μg?·?min^?1). In contrast, competitive exercise and exercise alone did not influence s-IgA concentration or secretion rate. Heart rate increased modestly to mental arithmetic (mean = 7 beats?·?min^?1) and substantially, and similarly, to the three exercise tasks (mean = 56(62 beats?·?min^?1). The hypothesis that the psychological stress of competitive exercise contributes to increased susceptibility to infection via reductions in s-IgA requires further investigation.     

Comparing the Difficulty of Examination Subjects with Item Response Theory

Methods are presented for comparing grades obtained in a situation where students can choose between different subjects. It must be expected that the comparison between the grades is complicated by the interaction between the students' pattern and level of proficiency on one hand, and the choice of the subjects on the other hand. Three methods based on item response theory (IRT) for the estimation of proficiency measures that are comparable over students and subjects are discussed: a method based on a model with a unidimensional representation of proficiency, a method based on a model with a multidimensional representation of proficiency, and a method based on a multidimensional representation of proficiency where the stochastic nature of the choice of examination subjects is explicitly modeled. The methods are compared using the data from the Central Examinations in Secondary Education in the Netherlands. The results show that the unidimensional IRT model produces unrealistic results, which do not appear when using the two multidimensional IRT models. Further, it is shown that both the multidimensional models produce acceptable model fit. However, the model that explicitly takes the choice process into account produces the best model fit.     

Academic development,SoTL and educational research

This essay considers the relation between academic development, the scholarship of teaching and learning, and educational research. It does so with reference to questions of academic identity and disciplinary expertise, arguing that as developers we need to consider carefully the ways in which we frame how we approach attempts to foster reflective practice through the scholarship of teaching and learning. Rather than positioning SoTL as educational research, it may make more sense to approach it strategically as a means of development oriented towards more local levels of practice.     

A preliminary study of the effect of computer-assisted practice on reading attainment

A computer system which gives prerecorded speech prompts on request was developed and a study was carried out to evaluate its effectiveness in enhancing the reading attainment of young children. Sixty children aged 61 to 84 months were tested on three measures of sight vocabulary (BAS Word Recognition, Frequently Occurring Words, words from the books read) before and after the intervention period of one month, during which 30 of the children had access to the system. The intervention group made significantly higher gains on the tests than the control group. The amount of practice undertaken by subjects was highly positively correlated with their gains. The amount of help which they requested showed no relationship to the gains. These results suggest that some effective practice in reading can be given by a computer.