This study compares segregation levels in Milwaukee public schools and in private schools participating in the Milwaukee voucher program. Using a segregation index that measures the difference between the percent of students in a school who are white and the percentage of school-age children in the greater metro area who are white, it finds that…

Our primary goal is to design a micro world which aspires to research thinking-in-change about distribution. Our premise, in line with a constructivist approach and our prior research, is that thinking about distribution must develop from causal meanings already established. This study reports on a design research study of how students appear to…

It is commonly assumed that environmentalism harms national economies because environmental regulations constrain economic activity and create incentives for firms to move production and investment to other countries. We point out that global environmentalism involves large-scale institutional changes that: (1) encourage new kinds of economic…

The hypothesis of positive skew in distributions of response to creative thinking tasks was studied. Data were obtained from examinees' responses to problem-solving tasks in three published studies of creative thinking. Subjects included 23 fifth graders (12 females and 11 males), 29 high school students (10 females and 19 males), and 47 female…

A cubic spline method for smoothing equipercentile equating relationships under the common item nonequivalent populations design is described. Statistical techniques based on bootstrap estimation are presented for choosing an equating method/degree of smoothing. Smoothing decreases the estimate of random error but results in an increase in…

Any voucher program that is going to have a major impact on a public education system is likely to require an expansion of private schools in order to accommodate increased demand; however, little is known about where private schools open and therefore how a major voucher program might affect private school availability in various communities.…

The job analysis study described in this report was conducted to serve as one of the bases for documenting the content validity of the Praxis II Subject Assessment in German. The purpose was to describe the most important knowledge and skills domains needed by newly licensed (certified) German teachers in order to perform their jobs in a competent…

This manual is a first effort to begin to identify, describe, and develop procedures for assessing various aspects of digital reference service. Its overall purpose is to improve the quality of digital reference services and assist librarians to design and implement better digital reference services. More specifically, its aim is to: assist…

Quality of schools is a critical resource in the production of school achievement, individual and national. Countries with a scarcity of resources (transportation, administration, and management) would be expected to perform worse in distributing any resource, especially one of such complexity as school quality, but this does not seem to occur.…

One means of Web use evaluation is through analysis of server-generated log files. Various log file analysis techniques and issues are presented that are related to the interpretation of log file data. Study findings indicate a number of problems; recommendations and areas needing further research are outlined. (AEF)

This study examined how upper elementary biology students grasped the concepts of mean and deviation from mean and the implications of these concepts. Pretesting and posttesting of students who did and did not have computer assisted training in the concepts indicated that though most students failed in more difficult tasks, experimental students…

This set of activity sheets requires students to organize and display data with a box-and-whiskers graph. Students use the plot as a summary display to detect patterns and to highlight the important features of the data for purposes of comparison. (PK)

Introduces controversial issue of subgroup norming, in which normative reference data are based on subgroups of population rather than on total group, in employment testing and briefly highlights two articles that address this issue. Controversy over subgroup norming has increased with passage of Civil Rights Act of 1991, which bans any form of…

A mathematical model is proposed to describe how group differences in distributions of abilities, which are distinct from the target ability, influence the probability of a correct item response. In the multidimensional approach, differential item functioning is considered a function of the educational histories of the examinees. (SLD)

An example of semantic pattern analysis, based on keywords selected from documents grouped by bibliographical coupling, is used to demonstrate the methodological aspects of knowledge discovery in bibliographic databases. Frequency distribution patterns suggest the existence of a common intellectual base with a wide range of specialties and…