Problems associated with randomization tests in single- case experiments are discussed. This article follows a discussion of randomization tests in single case studies in the same issue of this journal. (See TM 505 799; 505 801).(Author/JKS)

Methods for selecting relevant and appropriate quasi-experimental studies for inclusion in research synthesis using the threats-to-validity approach are presented. Effects of including and excluding studies are evaluated. (BS)

Problems with the scope, validity, and accuracy of statistical data on Puerto Ricans have led to difficulties in research on that population. This situation has contributed to the restricted access of Puerto Ricans to government-sponsored programs and to public services, such as education, that are necessary for social equality. (Author/GC)

An examination was made of Federal program statistics on vocational education during the past 10 years by the Bureau of Occupational and Adult Education of the U. S. Office of Education and the National Center for Education Statistics of the U. S. Department of Education. The study found that despite a mandate for reform, the National Center's…