A comparison of the non-language multiple-choice problem solving ability of very bright, average, and high-grade mentally defective eight-year- old children /

Danneffel, George J.,2013-08-162013-08-161972http://hdl.handle.net/11244/3298v, 74 leaves :Education, Special.Problem solving.Child development.A comparison of the non-language multiple-choice problem solving ability of very bright, average, and high-grade mentally defective eight-year- old children /Thesis