Recent methods to improve generalizations from nonrandom samples typically invoke assumptions such as the strong ignorability of sample selection, which is challenging to meet in practice. Although researchers acknowledge the difficulty in meeting this assumption, point estimates are still provided and used without considering alternative…

Randomized experiments are commonly used to evaluate if particular interventions improve student achievement. While these experiments can establish that a treatment actually "causes" changes, typically the participants are not randomly selected from a well-defined population and therefore the results do not readily generalize. Three…

The authors' purpose was to explore the effects of a supplementary, guided, silent reading intervention with 80 struggling third-grade readers who were retained at grade level as a result of poor performance on the reading portion of a criterion referenced state assessment. The students were distributed in 11 elementary schools in a large, urban…

A number of hypotheses derived from sociological theory and from previous research concerning the potential collaboration of citizens of the United States and Mexico were tested. Included in the samples were 1,528 interviews from the United States general public; 306 interviews from rural persons residing in places of 2,500 or less in Michigan;…

Project TALENT, the Equality of Educational Opportunity Survey, and the Base-Year Survey of the National Longitudinal Study tested national probability samples of American high school seniors in 1960, 1965, and 1972. This study is concerned with the feasibility of using these data for studying trends in educational attainment. Three separate…