The purpose of this study was to examine whether teaching materials designed
around fourth graders' preconceptions effectively produced conceptual change about
light propagation. Four Taiwanese fourth-grade intact classes (194 subjects), taught by
two teachers, participated in this study. The experimental group was exposed to the
conceptual change materials (CCM), and...
A method is presented in this study for improving
empirical travel cost analyses when truncated data are
available. The analysis expands upon a Monte Carlo study
conducted by Riyadi (1993) which compared the coefficient
and consumer surplus estimates for five travel cost
estimators using both truncated and censored data. Riyadi...