This paper presents a goal-based scenario approach to teaching introductory database concepts to undergraduates using two different scaffolding methods. One method, termed "worked-out examples," attempts to reduce extraneous cognitive load by requiring students to complete increasingly complex missing parts of worked out examples. The other…

Reading is a complex skill, vital for the postgraduate student. However, many international postgraduate students experience considerable difficulty when applying their reading practices learnt in their own countries. This paper, part of a larger study, aims to provide insights into the reading practices of Indian/Bangladeshi postgraduate students…

English as a Foreign Language (EFL) freshman students at the College of Languages and Translation received direct instruction in adjective-forming suffixes, then they took an immediate and a delayed test. Error analysis showed that 36% of the responses were left blank or the subjects duplicated the stimulus word. In 32% they mismatched the word…

In this cross-national study, the authors compared mathematics self-efficacy beliefs of American (n = 107) and Taiwanese (n = 188) middle-school students for level and calibration (accuracy and bias). Taiwanese students surpassed Americans in math achievement. American students evidenced slightly higher self-efficacy levels for easy math items but…

This study examined initial evidence of changes in fit to a unidimensional model for some language tests at multiple ability levels. Seven data sets were analyzed using the first phase of exploratory factor analysis: principal component eigenvalue extraction. Each data set is analyzed at varying n-sizes: whole group; random subsample; and five…

Several exploratory analyses of the fifths data generated by Test of English as a Foreign Language (TOEFL) item analyses were developed in order to evaluate the effects of options on the discriminability of difficult items and to identify difficult items with low, unreliable biserials that had been rejected by test developers, but for which…

This study was designed to compare the accuracy of three commonly used ability estimation procedures under the graded response model. The three methods, maximum likelihood (ML), expected a posteriori (EAP), and maximum a posteriori (MAP), were compared using a recovery study design for two sample sizes, two underlying ability distributions, and…

Modern applications of computerized adaptive testing (CAT) are typically grounded in item response theory (IRT; Lord, 1980). While the IRT foundations of adaptive testing provide a number of approaches to adaptive test scoring that may seem natural and efficient to psychometricians, these approaches may be more demanding for test takers, test…

Because of the lack of error-free, on-task performance by young children, cognitive modeling has not generally been considered an appropriate technique for characterizing computer use by young children. It is argued that cognitive modeling can be a useful strategy for organizing data on children's performance when the domain being studied is…

This study is the first stage of a wider enquiry into alternative ways of assessing the readability of specialist texts. The interest in assessing these texts arose from the need to grade 60 medical journal articles for an individualized English-as-a-Foreign-Language reading scheme for doctors. The study reports on an investigation of subjective…

Multiple group factor analysis is described and illustrated through a simulation involving 5,000 examinees. The estimation process of the group factors were implemented using the TESTFACT program of Wilson and others (1987). Group factor analysis is described as a special case of confirmatory factor analysis. Group factors can be computed based on…

American education has long equated reading with the narrower notion of literacy. Such an approach bypasses the concept of "difficulty," or the placing of ideas into question. The educational system has resisted adoption of a broader view of reading, because: (1) anything difficult is viewed as elitist and undemocratic; and (2) the…

Increasingly over the past several years, the reading of literature has been viewed as a social interpretive process. Conceptions of reading have changed from a largely cognitive process of print decoding to a socially situated one of understanding and appropriating a variety of discourse and text conventions. "Difficulty" is the result…

Researchers have suggested two models of risk preference to account for subjects' preference for tasks of moderate difficulty. The affective model proposes that pride of success and shame of failure are responsible for the observed preference. The cognitive model suggests preference for tasks of moderate difficulty because they are the most…

A study was made to determine whether there exists a group of overpersisting children who are considered mastery-oriented because of their persistence but who actually demonstrate characteristics of learned helplessness. Subjects were 71 females and 84 males from fourth-, fifth-, and sixth-grade classrooms. Children's scores on the Intellectual…