blastoderm: the germinal membrane from which the organs of the embryo are formed. Explanation of Terms Used in Entomology John. B. Smith He it was who introduced the terms Keimhaut (blastoderm) and Keimblatt (germ-layer).
Child Study. Child study, also called paidology or experimental pedagogy, was the attempt to apply the methods of modern science to the investigation of children in order to discover the laws of normal child development.
Significance it had within child psychology: Alfred Binet and Theodore Simon believed intelligence to be a learned entity. This test was formed in order to measure intelligence of children in accordance with their age. The test was used and varied among children from the ages of 3 years to 12 years.