Early readers came from higher socio-economic levels and smaller families, their mothers had more education, they spent more time in sedentary activities, and they received a variety of kinds of help. (Authors)

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)