The value of statistical research depends on valid comparisons which can usefully influence educational policy. Educational research needs to extend the measures of learning (such as the National Assessment of Educational Progress) through nationally-calibrated absolute measures and through computer-assisted and adaptive testing. Direct sampling…

The conference, dedicated to E.F. Lindquist, focused on three areas in which E.F. Lindquist pioneered: the development of tests of educational achievement, design and analysis techniques in educational research, and an application of electronic data processing to educational problems. Two of the papers are about the contributions to measurement…

Work on the development of the intensive time-series design was initiated because of the dissatisfaction with existing research designs. This dissatisfaction resulted from the paucity of data obtained from designs such as the pre-post and randomized posttest-only designs. All have the common characteristic of yielding data from only one or two…