This article presents the authors' rejoinder to the comments of Howard Bloom, Derek Neal, and Mike Seltzer on their article. Their commentary focused foremost on the advantages and disadvantages of using Options A, B, or C in using instrumental variables in multisite trials. Of interest are the quantities one can estimate and test in each case,…

Libraries are under pressure to prove their worth and may not have achieved this fully successfully. There is a resultant growing requirement for value and impact measurement in academic and research libraries. This essay reviews the natural history of library performance measurement and suggests that proof of worth will be measured by the…

What is the nature of latent predictors that facilitate diagnostic classification? Rupp and Templin (this issue) suggest that these predictors should be multidimensional, categorical variables that can be combined in various ways. Diagnostic Classification Models (DCM) typically use multiple categorical predictors to classify respondents into…

Discusses the theory of collaboration and measures of collaboration. Variables for collaborative measures are considered, principles are formulated that good collaborative measures should satisfy, examples and practical calculations are presented, and further problems for research are suggested. (nine references) (LRW)

Discusses Spolsky's "Conditions for Second Language Learning" (1989). It is suggested that a coordinated program of research on Spolsky's model of second-language learning would benefit from an understanding of the variable relationships to be explored in relation to the conditions for learning. (37 references) (JL)

In this paper the authors attempt to explain and sharpen unresolved issues and questions that have evolved in the study of careers, especially since the concept of "careers" has received increased theoretical and empirical attention across disciplines. The issues discussed involve (1) conceptualization and measurement of careers; (2)…

The concept of treatment integrity cuts across a diversity of fields involved with providing treatments or interventions to individuals. In medical treatments, the concept of "treatment compliance" or "treatment adherence" is an important and problematic issue. In the field of nutrition, the concept of "dietary adherence" is important for…

To help administrators improve school efficiency in a time of financial constraints, this document reviews research on school productivity, points out possible improvements suggested by the research, and discusses several problems in measuring school costs and effectiveness. The author first explains the analytical concepts of school productivity,…

The College Life Task Assessment Instrument (CLT), a 35-item questionnaire, assesses college student performance in 7 life-task domains important to college life. Reliability and Validity results demonstrate the CLT's ability to predict freshman and cumulative GPA, freshman and cumulative credits earned, academic, social, and personal-emotional…

This paper consolidates findings from two related studies: William Brown's research on the predictive ability of measures of early and non-high school interracial contact/opportunities that appear to affect interracial attitudes and behaviors in high school; and Martin Patchen's investigation in Indianapolis, Indiana high schools analyzing the…

Discusses the "5 percent fallacy," which refers to the number of older people living in institutions at a given time, and the likelihood of an older person dying in an institution. Three articles discuss research methodology, data interpretation, and measuring techniques. (JAC)

Presents a method of assessing kindergarten children that includes assessment of school achievement and assessment of children's social competence with a combination of measures. Investigation results highlight the argument. (BB)

This collection of reports on the measurement and meaning of unemployment consists of 13 papers devoted to some of the deficiencies in youth employment statistics, some of the necessary considerations in their implications, and many of the issues involved in their application to assess program impacts. Analyzed first are the youth labor force…