The relationships between three types of tasks were investigated with 428 children from kindergarten through grade 6 showing that correspondence, seriation, and transitivity reflected different underlying concepts. Thus, it was concluded that neither correspondence nor transitivity tasks can serve as replacements for traditional seriation tasks in…

The GEON-Project (1973-80) was a teacher-oriented program to improve kindergarten education in certain Dutch schools. Teachers were trained in diagnostic and differentiated teaching methods to improve students' emotional and cognitive development. The summative program evaluation found improvement in intelligence test results, but student school…