This methodological note illustrates how a commonly used calculation of the Delta-p statistic is inappropriate for categorical independent variables, and this note provides users of logistic regression with a revised calculation of the Delta-p statistic that is more meaningful when studying the differences in the predicted probability of an…

Upset because the University of California at Davis did not support her charges of misconduct among scientists, Melinda M. Zaragoza left her career in microbiology to run a general store in Kentucky. Although no wrongdoing was found on the Davis campus, Ms. Zaragoza's whistle-blowing now is being joined by a powerful chorus. Officials of the…

Inner-city crime is a motivating factor for middle-class flight. Therefore, crime is a cause of suburbanization. Movement of the middle and upper classes to the suburbs, in turn, isolates the poor in central-city ghettos and barrios. Sociologists and criminologists have argued that the concentration of poverty creates an environment within which…

This paper dives into the messy work of writing (our) sexualities into our qualitative research. We suggest that even though queering research methods opens up new ways of conducting research and sharing a queer identity with research participants there are some limitations to both notions. One such limitation is that queer identities and…

In this paper we present our experiences of conducting focus groups with young people as part of a participatory approach to research design and participant recruitment. The research is a prospective, 10-year, qualitative, longitudinal project investigating young people's daily lives, relationships, and identities, and the ways these change over…

Selection bias is a problem for mathematics education researchers interested in using observational rather than experimental data to make causal inferences about the effects of different instructional methods in mathematics on student outcomes. Propensity score methods represent 1 approach to dealing with such selection bias. This article…

This fifth and final paper in the Fordham Institute's series examining digital learning policy is "Overcoming the Governance Challenge in K-12 Online Learning". The purpose of this report is to outline the steps required to move the governance of K-12 online learning from the local district level to the less restrictive state level and to create a…

Numerous procedures have been suggested for determining the number of factors to retain in factor analysis. However, previous studies have focused on comparing methods using normal data sets. This study had two phases. The first phase explored the Kaiser method, Scree test, Bartlett's chi-square test, Minimum Average Partial (1976&2000),…

This article reviews issues and findings from 13 research studies relative to cross-racial supervision. The research in this area indicates that a strong working alliance between the supervisor and student is more likely to happen when supervisors are culturally responsive and competent. However, in order to better appreciate the nature and scope…

Treatment integrity refers to implementing interventions as intended. Treatment integrity is critically important for experimental validity and for drawing valid inferences regarding the relationship between treatment and outcome. Yet, it is rarely adequately addressed in psychotherapy research. The authors examined barriers to treatment integrity…

The purpose of this study was to determine the effects of interactive multimedia simulations and virtual dissection software on depth of learning among students participating in biology and chemistry laboratory courses. By understanding more about how simulation and virtual dissection software changes depth of learning, educators will have the…

As the percentage of teachers participating in induction programs has increased over the past two decades and new state and federal mandates have been enacted to improve the quality of the teacher workforce, published literature on teacher induction and mentoring has grown. Despite an increasing research base, the current research has been…

The paper opens with a discussion of some of the methodological difficulties inherent in comparative educational research, and outlines ways in which systemic inequalities in doing comparative work can be reduced. The social circumstances in Thanet and Lille are delineated, and the paper then considers structural differences in denominational…

Working with data from the PISA study (OECD, 2007), Lynn (2010) has argued that individuals from South Italy average an IQ approximately 10 points lower than individuals from North Italy, and has gone on to put forward a series of conclusions on the relationship between average IQ, latitude, average stature, income, etc. The present paper…

The EU Action Plan on Drugs (2005-2008) calls for member states of the European Union to provide information on five key epidemiological indicators. These are: general population surveys, prevalence and patterns of problem drug use, drug related infectious diseases, drug related deaths and mortality of drug users, and demand for drug treatment.…