It has been suggested that researchers comparing causal models across populations employ path regression coefficients corrected for unreliability. This procedure, however, does not eliminate the problem of differences in the units of measure across populations. This paper outlines a technique...

All statistical models must be identified if the estimates are to be meaningful. Determining the identification status of the measurement portion of a structural equation model can be difficult because the resulting system of covariance equations is nonlinear. The recent literature on...

Social scientists often use the mean of individual-level characteristics to describe aggregates such as organizations, schools, or programs. They seldom, however, attempt to assess the reliability of these measures. This article indicates how the internal consistency reliability of such measures...

This article shows how assessment data such as that mandated by the No Child Left Behind Act can be used to examine the effectiveness of educational interventions and meet the Act’s mandate for “scientifically based research.” Based on the classic research design literature a cohort...