The Education Voucher Demonstration began in the Alum Rock Union Elementary School District during the 1972-73 school year. Under the voucher concept, parents freely select a school for their child and receive a credit or voucher equal to the cost of the child's education that is paid directly to the school upon enrollment. It was presumed that…

Based on results from the nonequivalent control group design, the mean performance in the nonvoucher and traditional voucher programs remain similar. It is quite plausible that the loss of teacher time due to planning, developing, and modifying a new curriculum led to the loss in reading achievement. (Author/CTM)

This note suggests a solution to the problem of achieving randomization in experimental settings where units deemed eligible for treatment "trickle in," that is, appear at any time. The solution permits replication of the experiment in order to test for time-dependent effects. (Author/CTM)

Flexibility in evaluative research design does not necessitate the abandonment of randomly constructed comparison groups. Three designs are reviewed which provide at least the option of randomization while maintaining great flexibility. The strengths and weaknesses of the designs are discussed. (Author)

A major problem in social science research is that of successfully carrying out the random assignment of persons to experimental and control groups. In this study a computer-based random assignment procedure operated successfully on a weekly basis for 17 consecutive weeks in a program serving over 360 ex-offenders. (CTM)

Practical methods for implementing true experimental designs in evaluation settings in which such designs are rarely used are presented. Particular attention is paid to educational settings. (Author/JKS)

An eighth grade alcohol education program and its evaluation are described. The design and methodology of this evaluation, and of program evaluation in general, are also discussed. The results are not presented. (CTM)

A survey of existing research designs and accompanying techniques if presented along with brief assessments of their usefulness for programs of different types. The authors stress particularly the use of field experiments for the assessment of prospective social policies and programs. (Author/MV)

The possible biasing effects of attrition of subjects in longitudinal experiments is a problem to which social science researchers and evaluators rarely attend. A study of research on Project Follow Through, however, revealed few differences in family income or pretest scores, between students who dropped out of treatment and of comparison groups.…

A review of the literature suggests that choice of control group may have affected the policy implications of the major evaluations of governmental training programs. It is argued that the usual evaluation designs underadjust for preprogram differences between trainees and the control group and thus yield biased estimates of program impact.…