Applies Latour's notion of graphism to the hierarchy of sciences. Finds that the use of graphs across seven scientific disciplines correlates almost perfectly with their hardness, and that the same pattern held up across 10 specialty fields in psychology. (Author/CCM)

We reviewed a "Mental Retardation" article by Conroy et al. (2003) on consumer outcomes following the closure of the Hissom Center in Oklahoma. In this article the authors misconstrued their 254 subjects, implying they are representative of the Hissom Focus Class while failing to account for 128 subjects included in an earlier analysis.…

Chicago's Renaissance 2010 seeks to create 100 new and autonomous schools by 2010. These new schools are expected to increase choice for parents and students, enact innovative practices, and help create a portfolio of schools designed to make the Chicago Public Schools (CPS) more diversified, responsive, and effective. Renaissance Schools Fund…

Implementation of the No Child Left Behind (NCLB) legislation has been accompanied by demand for data systems capable of providing a longitudinal record of each student's educational experiences and performance over time. The national Study of Education Data Systems and Decision Making is examining both the implementation of student data systems…

School improvement without will and moral purpose--without a genuine commitment to all students--is an empty exercise in compliance that, in the authors' experience, can do more harm than good. The authors have seen educators use data to "more accurately" track students, further widening the opportunity-to-learn gap. In response to achievement…

An analysis of survey data is used to examine the practices used to hire teachers, the level of principal autonomy within the process, the attributes sought in teachers, and to compare each based upon the characteristics of schools and of principals. Findings indicate that urban and low-performing schools (and the principals of these schools) are…

The comparability of examinations in different subjects has been a controversial topic for many years and a number of criticisms have been made of statistical approaches to estimating the "difficulties" of achieving particular grades in different subjects. This paper argues that if comparability is understood in terms of a linking…

In the United States, when English language learners (ELLs) are tested, they are usually tested in English and their limited English proficiency is a potential cause of construct-irrelevant variance. When such irrelevancies affect test scores, inaccurate interpretations of ELLs' knowledge, skills, and abilities may occur. In this article, we…

In this article, a practical demonstration suitable for any biology college classroom is presented. With the examples of a complex biological specimen (slug's radula) and a simple reference specimen (electron microscopical grid imprint in gelatin), both of which can be easily prepared, the capabilities of two imaging modes commonly used in optical…

Mathematics and statistics play important roles in peoples' lives today. A day hardly passes that they are not bombarded with many different kinds of statistics. As consumers they see statistical information as they surf the web, watch television, listen to their satellite radios, or even read the nutrition facts panel on a cereal box in the…

People often make interpretations when they believe they are providing factual descriptions. To demonstrate unintentional interpretation, the author showed a brief ambiguous video clip and asked students to write descriptions of what they saw and heard. When students evaluated their responses, they discovered that 96% of the class wrote…

A long-standing issue in the study of how people acquire visual information centers around the scheduling and deployment of attentional resources: Is the process serial, or is it parallel? A substantial empirical effort has been dedicated to resolving this issue. However, the results remain largely inconclusive because the methodologies that have…

Outliers, extreme data values relative to others in a sample, may distort statistics that assume internal levels of measurement and normal distribution. The outlier may be a valid value or an error. Several procedures are available for identifying outliers, and each may be applied to errors of prediction from the regression lines for utility in a…

Recent research suggests that the examination of students' work may lead to changes in teaching practice that are more effective in terms of students' mathematical learning. However, the link between the examination of students' work and the teachers' actions in the classroom is largely unexamined, particularly at the secondary level. In this…

Reporting and interpreting (corrected) effect size indices can help readers of scientific reports understand the importance of those results more fully instead of just determining the likelihood of results assuming the null hypothesis. This study explored the frequency of effect reporting and interpretation in quantitative studies in Communication…