1. Ladislav Košč PhD, is a clinical psychologist, senior research worker, and head of the Department of Child Pathopsychology in Bratislava, Czechoslovakia. His professional interests concern mainly the theory and methodology of psychodiagnostics and remediation of learning disabilities, especially in mathematics. His publications include Psychology of Mathematical Abilities (1972), Developmental Dyscalculia (1971-72), Thinking and Intelligence (1986), and Pathopsychology of Learning and its...