An empirical study of the power of the F test in normal populations with variances proportional to the cell means is reported. The results indicate that the power of the test can be approximated by the noncentral F distribution with a modified parameter of noncentrality. (Author/CM)

Power and stability of Type I error rates are investigated for the Box-Scheffe test of homogeneity of variance with varying subsample sizes under conditions of normality and nonnormality. The test is shown to be robust to violation of the normality assumption when sampling is from a leptokurtic population. (Author/GK)

The F-distribution approximation suggested by Dixon was investigated at various combinations of alpha and degrees of freedom. Tabled values were compared with values computed utilizing the suggested formula. (Author/GSK)

The robustness of hypothesis tests for the correlation coefficient under varying conditions is discussed. The effects of violations of the assumptions of linearity, homoscedasticity, and kurtosis are examined. (JKS)

This program generates maximum likelihood estimates of the parameters of a mixture of two normal distributions and tests the significance of the mixture hypothesis against that of a single normal distribution. (Author)

Discusses problems in detecting nonlinear associations and investigates the use of two statistics for this purpose. Simulation results suggest that the Cramer-von Mises form of the test statistic is generally better than the Kolmogorov-Smirnov form. Discusses the power of this method. (SLD)

As China enters WTO, more college graduates with higher oral English proficiency are required. However, we learned that even students in some distinguished universities are lack of this ability. Based on her teaching experiences and the theory proposed by Krashen and some other well-know foreign languages teaching researchers, the author of this…

The article discusses the issue of e-learning courses as an alternative to traditional face-to-face courses or the support of the face-face courses. The main aim of the article is not to decide which alternative is more effective, but to find out whether there are students with particular learning style who are pre-disposed to e-learning. There…

The present study, based on the work of Dweck (2000) and her description of helpless and mastery-orientated children, was designed to find a new, simple and economic way of assessing helplessness while testing a child's intelligence. Two hundred and thirty-two Austrian grammar-school children, previously classified as either helpless or…

This report contains the Proceedings of the 1982 Item Response Theory and Computerized Adaptive Testing Conference. The papers and their discussions are organized into eight sessions: (1) "Developments in Latent Trait Theory," with papers by Fumiko Samejima and Michael V. Levine; (2) "Parameter Estimation," with papers by…

In eight chapters, this document offers guidelines for school administrators on evaluating schools and school programs, based on a poll of administrators and consultants. The introduction discusses the purpose of evaluation, especially school improvement, and presents a list of evaluation standards. Chapter 1 outlines steps in evaluation planning,…

The relationship between the Instructional Process, Instructional Objectives, and Assessment Tasks, identified at the School City of Gary, Indiana, necessitate an effective testing program. Four characteristics perceived crucial to a sound program were: (1) The program should be continuous, (2) The testing program should be comprehensive, (3)…

Virtual learning is a popular teaching modality, and it has been reported in research that there is no significant difference in academic outcome as compared with face-to-face courses. Not all researchers agree with this assertion and some claim it is more difficult to teach math-oriented subjects online. Given that educational psychology theories…

The current literature indicates a need for quality studies on how best to close the achievement gap between elementary English language learners (ELLs) and their English speaking peers. The purpose of this sequential explanatory mixed methods research study was to determine the relationship between standards-based differentiated instructional…

This study examines whether MidYIS and YELLIS cognitive ability tests (CATs) are appropriate methods for the identification of giftedness in Design and Technology. A key rationale for the study was whether CATs and able to identify those students with the aptitudes considered of importance to identifying giftedness in Design and Technology and…