Present composition teaching and testing techniques do not formally capture student improvement across essays. Contract learning, a procedure in which student essays are error-analyzed for repeated mistakes, can do so. Correction of those repetitions becomes a set of goals on a written contract signed by the teacher and student, and the student…

The projection of shadows task developed by Inhelder and Piaget was used to identify error patterns and solution strategies used by diverse populations in a sequence of proportion tasks. In Study A, two group tests were administered to 607 students from science and mathematics classes in grades 9 and 10. A sub-sample of 69 students was involved in…

A study of Greek speakers' ability to understand and produce two varieities of codes--Katharevousa (K) and Demotic (D)--is reported. The investigation was undertaken to provide evidence supporting or refuting the Greek government's decision to legislate Demotic as the official language of the country. A sample of 545 informants were tested with a…

Because public opinion polls have become important sources of information for legislators and politicians, public opinion pollsters should carefully consider the relationships between gender wording of polling questions, measurement errors, and validity and generalizability of survey findings. Findings from numerous research projects indicate that…