Effect Sizes (ES) are an increasingly important index used to quantify the degree of practical significance of study results. This paper gives an introduction to the computation and interpretation of effect sizes from the perspective of the consumer of the research literature. The key points made are: (1) "ES" is a useful indicator of the…

In this paper, we examine the use of an ordinary differential equation in modelling the SARS outbreak in Singapore. The model provides an excellent example of using mathematics in a real life situation. The mathematical concepts involved are accessible to students with A level Mathematics backgrounds. Data for the SARS epidemic in Singapore are…

According to the aspect hypothesis (Andersen & Shirai, 1996; Bardovi-Harlig, 2000), perfective morphology emerges before imperfective morphology, it is first used in telic predicates (achievements and accomplishments) and it later extends to atelic predicates (activities and states). The opposite development is hypothesized for imperfective…

A number of researchers have explored the attributions that care staff make about challenging behavior. The expectation, based on behavioral and cognitive models, is that these attributions may help predict why staff inadvertently reinforce challenging behavior. Two studies of staff attributions about challenging behavior are reported. In the…

Hierarchical agglomerative cluster analysis (HACA) may yield different solutions under permutations of the input order of the data. This instability is caused by ties, either in the initial proximity matrix or arising during agglomeration. The authors recommend to repeat the analysis on a large number of random permutations of the rows and columns…

The following laboratory exercise was designed to aid student understanding of the differences between subjective and objective measurements. Students assess the color and texture of different varieties of potato chip (crisps) by means of an intensity rating scale and a rank test and objectively with a colorimeter and texture analyzer. For data…

Purpose: The purpose of this paper is to report on a research project that identified organisational critical success factors (CSFs) for e-learning implementation in higher education (HE). These CSFs can be used as a theoretical foundation upon which to base decision-making and strategic thinking about e-learning. Design/methodology/approach: The…

This article uses a case study of 2001 town and city data that we analyzed for "Boston Magazine". We use this case study to demonstrate the challenges of creating a valid ranking structure. The data consist of three composite indices for 147 individual townships in the Boston metropolitan area representing measures of public safety; the…

The use of Internet to aid research practice has become more popular in the recent years. In fact, some believe that Internet surveying and electronic data collection may revolutionize many disciplines by allowing for easier data collection, larger samples, and therefore more representative data. However, others are skeptical of its usability as…

Objective: Both the National Institute of Mental Health and the American Psychological Association have called upon psychodynamic practitioners to start demonstrating their outcomes. This effectiveness study attempted to begin to answer these calls. Method: The study was a secondary analysis of data from a multidisciplinary, psychodynamic mental…

This editorial reviews recent studies of accountability policies using National Assessment of Educational Progress (NAEP) data and compares the use of aggregate NAEP data to the availability of individual-level data from NAEP. While the individual-level NAEP data sets are restricted-access and do not give accurate point-estimates of achievement,…

In attempting to provide empirical qualitative data analysis, the researcher has to work within many constraints. There are ethical issues that need to be considered and evaluated in the managing of data, especially one that is naturally occurring. One of the more popular methods of "capturing" this data is through audio recording and to be able…

This article provides a typology of reasons for conducting mixed-methods research in special education. The mixed-methods research process is described along with the role of the rationale and purpose of study. The reasons given in the literature for utilizing mixed-methods research are explicated, and the limitations of these reason frameworks…

In this article, the author emphasizes decision making rather than mere remembering as a tool for teaching social studies. Decision making should be emphasized at two levels: at the level of deciding what a group of descriptive data means, how these data may be summarized or generalized, what principles they suggest; and also at the level of…

This article investigates children's evaluation/selection of ideas in writing-related tasks. The critical dimension being considered was to what extent the communicative goal that defines argumentation establishes basic criteria with which children decide whether to include counterargument in a text. Data analysis focused on participants'…