This pretest report on the National Head Start Evaluation Project gives data on ethnicity and ages of children enrolled in four Head Start centers in Oklahoma, New Mexico, and Arizona, and describes the present status of evaluation at these centers. Completed pretests, proposed evaluation instruments, and available pretest data are presented.…

Reports that no significant difference in reliability appeared between a heterogeneous and a homogeneous form of the same general science matching-item test administered to 316 sixth-grade students but that scores on the heterogeneous form of the test were higher, independent of the examinee's sex or intelligence. (SB)

Though some unexpected sex differences were discovered, the two diagnostic categories were not found to be psychometrically distinct. Further, the results of a longitudinal analysis suggested that, while IQ scores remained relatively stable over time within a subset of the original sample, achievement scores definitely declined. (Author)