Experimental designs in the social sciences have received increasing attention due to their power to produce causal inferences. Nevertheless, experimental research faces limitations, including limited external validity and unrealistic treatments. We propose combining qualitative fieldwork and experimental design iteratively--moving back-and-forth…

The feedback between vocational education and training (VET) and the labour market can provide important input for the review and renewal of qualifications. A feedback loop that is based on learning outcomes helps provide deeper insights into what is required on the labour market, what is offered in training provisions and assessed at the end of a…

The aim of this case study is to highlight the importance of piloting or pre-testing the research design (in this case, semi-structured interviews and narratives). Most textbooks offer minimal guidance about pre-testing the research design, and published reports rarely report whether the research was piloted and, if so, what were the results.…

We discuss collecting data simultaneously from many different instruments, including both qualitative and quantitative sources. A list of instruments used is provided, and data collection methods are described. Many practical logistical concerns are discussed, warning of potential pitfalls to be avoided. This article is intended to be a practical…

This supporting statement accompanied the first followup questionnaire for the National Longitudinal Study of the High School Class of 1972, when it was submitted for government clearance. The first part of the statement gives the background, uses, and justification of the survey; the largest part describes the plans for the first follow-up…

As a step in combining three of the Elementary and Secondary Education surveys of the National Center for Education Statistics to produce one database linking local education agencies, schools, and teachers, the merged procedures and collections forms were pretested. Different methods were tested by splitting the pretest sample of 220 public…

The Panel on Decennial Census Methodology met during the year 1984 to investigate the following technical issues related to the 1990 United States census: (1) adjustment of census counts and characteristics; (2) sampling; and (3) administrative records. A number of recommendations were made. It was suggested that a low priority be given to…

In anticipation of the base-year survey of the National Education Longitudinal Study of 1988 (NELS:88), a field test of the questionnaire and test items was conducted in 1987. NELS:88 is a national, longitudinal study designed to provide trend data about the critical transitions of young people as they develop, attend school, and enter the work…

Approximately 6,500 children are enrolled per year in the New York State Experimental Prekindergarten Program (PreK). In 1975-76 a longitudinal study was begun to determine the program's impact on the development of children while enrolled in the program and in the primary grades. Samples from a population of 5,245 four-year-old prekindergarten…