Making Sense of Single‐Case Design Effect Sizes

Single‐case research methods provide a basis for demonstrating that an intervention produces a reliable change in a targeted outcome for individual cases. To supplement visual analysis of data in single‐case studies, researchers frequently report statistics—often referred to as effect sizes—to summarize study findings. The recent proliferation of effect sizes used in single‐case research can be confusing. In this article, after reviewing single‐case research, we provide an overview of common types of effect sizes used in single‐case research, including overlap metrics and within‐ and between‐participant effect sizes, and conclude with examples of these effect sizes in the single‐case literature. Our take‐home message is that effect sizes are useful complements to visual analysis when interpreting results of single‐case design research studies.     

Sequential effects of high and low instructional guidance on children’s acquisition of experimentation skills: Is it all in the timing?

We report the effect of different sequences of high vs low levels of instructional guidance on children’s immediate learning and long-term transfer of simple experimental design procedures and concepts, often called “CVS” (Control of Variables Strategy). Third-grade children (N = 57) received instruction in CVS via one of four possible orderings of high or low instructional guidance: high followed by high (HH), high followed by low (HL), low followed by high (LH), and low followed by low (LL). High guidance instruction consisted of a combination of direct instruction and inquiry questions, and low guidance included only inquiry questions. Contrary to the frequent claim that a high degree of instructional guidance leads to shallow learning and transfer, across a number of assessments—including a 5-month post-test—the HH group demonstrated a stronger understanding of CVS than the LL group. Moreover, we found no advantage for preceding high guidance with low guidance. We discuss our findings in relation to perspectives advocating “invention as preparation for future learning”, and the efficacy of “productive failure”.     

Engineering graduates’ perceptions of how well they were prepared for work in industry

This study investigated how well chemical engineering graduates perceive they were prepared for work in industry. To this end, sixteen interviews were carried out with a purposive sample of recent University of Cape Town chemical engineering graduates. Qualitative analysis of the interview data showed that graduates felt that overall, they were well prepared for work in industry. They perceived their strengths to be their technical background, problem solving skills, formal communication skills and life-long learning abilities. The following areas of weakness were also identified: work in multi-disciplinary teams, leadership, practical preparation and management skills.

The use of interviews for data collection is a significant departure from the methods used in other studies in this area. The rich and contextual data gathered from the interviews justified this choice and contributed to the identification of issues not previously mentioned in the literature. For example, an unexpected finding of the study was that there was a clear link between the technical and non-technical attributes of engineering graduates, a result which has clear implications for the design of undergraduate engineering programmes.     

Reflections on “teachers' thinking about at‐risk learners and others”

This article examines the contextual, conceptual, and empirical foundations of functional behavioral assessment (FBA) in general educational settings. Schools today face 2 important, contextual challenges: the need to design effective responses to increases in individual problem behavior and the need to be compliant with the 1997 amendments to the Individuals With Disabilities Education Act. FBA as a solution to these challenges is explored from a conceptual framework. Finally, the empirical literature supporting the use of FBA in typical school settings is reviewed briefly.     

Introduction to Special Issue: Null Effects and Publication Bias in Learning Disabilities Research

The importance of publishing studies with null findings to the scientific enterprise is garnering attention in social science at large and education in particular. In this article, we first define null findings and publication bias as they relate to group and single‐subject instructional intervention research. We then explore the prevalence of instructional intervention studies that report null findings in the learning disabilities literature. Overall, we found that few studies have been published in learning disability journals that reported all null results. However, a significant number of group studies reported mixed findings (i.e., at least one, but not all, outcome measures were not statistically significant). Next, we summarize the experimental studies that comprise this special issue on null findings. Last, we speculate regarding strategies that might be enacted to increase the publication of studies with null findings in the learning disabilities field.     

Students with disabilities: Doing what's right

Providing equal educational access to students with disabilities is both a legal and a moral obligation. It is also an important component of the educational experience of all students. The authors offer suggestions for creating inclusive, accessible campus environments.     

Secular and Koranic literacies in South Asia: From colonisation to contemporary practice

This paper explores the distinction between ‘secular’ and ‘Koranic’ schooling and literacy in South Asia. It begins by tracing an archaeology of the distinction between secular ‘literacy’ and religious ‘illiteracy’. It locates the emergence of the distinction in the colonial census of the 19th century, in the development of ‘English’ education, and the responses within madrasa schools. The second part locates these debates and their on-going importance within a contemporary ethnographic setting. It examines the relevance of the distinction in relation to women's literacy practices. The paper argues that both secular and religious literacy practices are significant for women's status and well-being, and illustrates the centrality of religious reading and learning in Bangladesh. The paper challenges the conventional distinction between religious and secular schooling and literacy, noting their complementary and overlapping nature.     

Classification of legal texts by computer

A suite of computer programs has been developed for representing the full text of lengthy documents in vector form and classifying them by a clustering method. The programs have been applied to the full text of the Conventions and Agreements of the Council of Europe which consist of some 280,000 words in the English version and a similar number in the French. Results of the clustering experiments are presented in the form of dendrograms (tree diagrams) using both the treaty and article as the clustering unit. The conclusion is that vector techniques based on the full text provide an effective method of classifying legal documents.