This Digest provides a review and applications of the concepts of normal distribution, standard deviation, effect size, and translation of effect size into percentile gain, the foundations for the understanding of meta analytic results. Meta analysis is a statistical technique that enables the results of a number of studies to be combined to…

The Simulated Oral Proficiency Interview (SOPI) is a semi-direct speaking test that models the format of the Oral Proficiency Interview (OPI), an oral proficiency test used by government agencies to assess general speaking proficiency in a second language. The SOPI is a tape-recorded test consisting of six parts. It begins with simple, personal…

This ERIC Digest examines how changing family patterns have affected the full-day/half-day kindergarten issue, discussing why schools are currently considering alternative scheduling and describing the advantages and disadvantages of each type of program. The following changing family patterns affecting the choice of full-day kindergarten programs…

Smaller families in general (including the one-child option) are becoming more popular. This ERIC Digest focuses on changing trends in family size, reasons for choosing to have only one child, differences between only children and those with siblings, and the advantages of being an only child. Changing family patterns, economic concerns, and new…

This digest discusses the results of the Third International Mathematics and Science Study (TIMSS), conducted during the 1994-95 school year, in relation to teaching and suggests resources for further study. The digest includes a description of the study, data collection methods of the study, key results, and details of TIMSS-R, a repeat study…

This Digest summarizes trends in grading practices and introduces issues related to standards-based reporting. A large majority of schools use a traditional grading system, and many teachers have a great deal of autonomy in making decisions about grades. Given the latitude that teachers have in developing grading policies and differences in…

The National Assessment of Educational Progress (NAEP) in geography is a periodic survey of geographic knowledge and skill of students at grades 4, 8, and 12. The first NAEP in geography was conducted in 1994 and the second in 2001. Like the 1994 assessment, the 2001 assessment probed students' ability to recall, understand, analyze, and interpret…

Among the different types of experimental design are two general categories: true experimental designs and quasi- experimental designs. True experimental designs include more than one purposively created group, common measured outcomes, and random assignment. Quasi-experimental designs are commonly used when random assignment is not practical or…

This digest discusses some of the practical implications of using alternative methods of assessing students in foreign or second language classrooms. First, assessment and testing are contrasted, and assessment is defined as an ongoing strategy through which student learning is not only monitored, but by which students are involved in making…

The perception is that most studies on distance education or the use of technology are poorly designed or prone to incomplete analyses. This is true of the simple comparison study, where student outcomes are compared to those of students in a traditional course. Such studies are the basis for the often cited conclusion that there is no significant…

This digest compares the efforts of the United States and of other member countries of the Organization for Economic Co-operation and Development (OECD) to finance center- and facility-based preschool. In many OECD countries, public preschool is more widely available than in the United States. For example, in France, 100%, and in Italy,…

Meta-analysis is a collection of systematic techniques for resolving apparent contradictions in research findings. Meta-analysts translate results from different studies to a common metric and statistically explore the relations between study characteristics and findings. Since G. Glass first used the term "meta-analysis" in 1976, it has…

Many reasons can be offered for teaching about Australia. The field of Australian studies offers many opportunities for U.S. teachers and students to critically analyze aspects of their own culture, for there are many experiences in the history of Australia that parallel the U.S. experience. Australia and the United States have strong ongoing…

This digest discusses research on economic gains for community college students and explores whether a community college education serves to minimize the wage gap between women and men and between advantaged and disadvantaged groups. It summarizes research that supports the assertion that a community college education offers economic advancement…

Abuses and misuses of statistics are frequent. This digest attempts to warn against these in three broad classes of pitfalls: sources of bias, errors of methodology, and misinterpretation of results. Sources of bias are conditions or circumstances that affect the external validity of statistical results. In order for a researcher to make…