Because of their efficiency and ability to keep many other factors constant, twin studies have a special appeal for investigators. Just as with any teaching dataset, a "matched-sets" dataset used to illustrate a statistical model should be compelling, still relevant, and valid. Indeed, such a "model dataset" should meet the…

The Success By 6® (SB6) initiative is designed to support early care and education centers in improving and sustaining quality in Pennsylvania's Keystone STARS Quality Rating and Improvement System (QRIS). The SB6 evaluation report examines implementation and outcomes. The findings have implications for SB6 continous quality improvement process…

Minnesota Reading Corps (MRC) is the largest AmeriCorps State program in the country. The goal of MRC is to ensure that students become successful readers and meet reading proficiency targets by the end of the third grade. Starting in 2011, the "Corporation for National and Community Service" (CNCS) sponsored a randomized controlled…

In this set of four supplemental tables, the authors compare the baseline test scores of the treatment and matched control group samples observed in each year after KIPP entry (outcome years 1 to 4). As discussed in Chapter III, the authors used an iterative propensity score estimation procedure to calculate each student's probability of entering…

A table of critical values is provided for the simple and accurate testing of the step-down procedure proposed by R. E. Welsch (1977) and the Shaffer-Welsch procedure (1979, 1981). Advantages and use of the table are presented and discussed. (Author/SLD)

Compares the methods used to measure the educational attainment of respondents to the Current Population Survey and the decennial census. Describes a way to reconcile old and new methods of determining highest grade completed. (JOW)

Results of an investigation designed to determine whether the impact factor or the immediacy index--two derivative measures of citation analysis--provide useful insights into qualitative relationships among scientific journals indicate that neither measure is significant. (MBR)

One of the most frequently encountered problems in educational research and evaluation is that of evaluating the effect of a treatment in settings over which the researcher or evaluator has little control. A strong plea is made for use of quasi-experimental designs in these situations and this research provides a method of testing the hypothesis…

Ford's procedure is likely to be useful whenever one wants to achieve a single rank order by combining data obtained from multiple judges'' who have placed objects'' into ordered categories. (Authors)

The study of public school spending has proceeded in a disjointed fashion, with no generally accepted theoretical paradigm. In this article, the models from 13 studies are reestimated using a single data base. The results obtained suggest the facts that the desired hypothetical-deductive analysis would be expected to explain. (Author/JG)

Use of the usual bivariate correction for attenuation with more than two variables presents two statistical problems. This pairwise method may produce a covariance matrix which is not at least positive semi-definite, and the bivariate procedure does not consider the possible influences of correlated errors among the variables. The method described…

This study addresses the concept of "absentee-proneness", the notion that a small percentage of employees are responsible for a great percentage of absenteeism. Results showed that a core of employees was responsible for the vast majority of absenteeism in any one quarter, but that the core changed from quarter to quarter. (Editor)

The purpose of this report is to describe a process for creating unique multiple linear regression problems for each student. Three formulas were utilized to define intercorrelations between variables. (Editor)

Research methods used in articles published in the "American Educational Research Journal" (AERJ), "Educational Researcher" (ER), and the "Review of Educational Research" (RER) were studied for the years 1978 to 1997. Articles were read to identify and categorize the research methods and statistical techniques used in…