Improving the Bandwidth Selection in Kernel Equating

We investigate the current bandwidth selection methods in kernel equating and propose a method based on Silverman's rule of thumb for selecting the bandwidth parameters. In kernel equating, the bandwidth parameters have previously been obtained by minimizing a penalty function. This minimization process has been criticized by practitioners for being too complex and that it does not offer sufficient smoothing in certain cases. In addition, the bandwidth parameters have been treated as constants in the derivation of the standard error of equating even when they were selected by considering the observed data. Here, the bandwidth selection is simplified, and modified standard errors of equating (SEEs) that reflect the bandwidth selection method are derived. The method is illustrated with real data examples and simulated data.     

Checking the possibility of equating a mathematics assessment between Russia,Scotland and England for children starting school

Is it possible to compare the results in assessments of mathematics across countries with different curricula, traditions and age of starting school? As part of the iPIPS project, a Russian version of the iPIPS baseline assessment was developed and trial data were available from about 300 Russian children at the start and end of their first year at school. These were matched with parallel data from representative samples of equal numbers of children from England and Scotland. The equating of the scales was explored using Rasch measurement. A unified scale was easiest to create for England and Scotland at the start and end of their first year at school when children only differ by a half a year in age, and live in adjacent countries with a common language. Although fewer items showed invariance across the three countries, it was possible to link iPIPS scores in mathematics from the start and end of the first year at school across Scotland, England and Russia. The findings of this study suggest that, despite the apparent difficulties, meaningful comparisons of mathematics attainment and development can be made. These will allow for substantive interpretations with policy implications.     

Validity of GRE General Test scores and TOEFL scores for graduate admission to a technical university in Western Europe*

Graduate admission has become a critical process in tertiary education, whereby selecting valid admissions instruments is key. This study assessed the validity of Graduate Record Examination (GRE) General Test scores for admission to Master’s programmes at a technical university in Europe. We investigated the indicative value of GRE scores for the Master’s programme grade point average (GGPA) with and without the addition of the undergraduate GPA (UGPA) and the TOEFL score, and of GRE scores for study completion and Master’s thesis performance. GRE scores explained 20% of the variation in the GGPA, while additional 7% were explained by the TOEFL score and 3% by the UGPA. Contrary to common belief, the GRE quantitative reasoning score showed only little explanatory power. GRE scores were also weakly related to study progress but not to thesis performance. Nevertheless, GRE and TOEFL scores were found to be sensible admissions instruments. Rigorous methodology was used to obtain highly reliable results.     

‘Empty signifiers’ and ‘dreamy ideals’: perceptions of the ‘international university’ among higher education students and staff at a British university

This paper reports on a mixed-methods case study investigating how higher education staff and students understand, experience and envision the ‘international university’. As it is becoming clear that international student mobility is not in itself a panacea for universities seeking to internationalise, ‘internationalisation at home’ and ‘global citizenship’ are increasingly permeating university policy documents and mission statements. However, little is known about how students and staff on the ground perceive and experience these concepts. Quantitative and qualitative data were collected at one British university through focus groups (N = 19) and through an online survey (n = 148). Findings revealed a conventional mobility-focused understanding of the international university among students and staff, and a great deal of cynicism as regards ‘internationalisation at home’ and ‘global citizenship’. We discuss implications for practice and a research agenda.