These proceedings report the results of 10 years of ongoing research by the Malaysian Child Development Project to develop and implement measures to study the cognitive, language, and socioemotional development of Malaysian preschool children. Part 1 of the report contains opening speeches delivered by conference organizers and dignitaries. Part 2 presents 16 papers delivered at the conference. They are: (1) "Physical Development: Present Status and Future Objectives" (J. O. Forfar); (2) "Physical Growth" (Chen Siew Tin); (3) "Sanitation and Child Development" (K. Chandra Sekhar); (4) "Nutrition and Child Development" (Ong Kah Guan and Prabha Joginder Singh); (5) "Cognitive Development of Preschool Children" (Chiam Heng Keng); (6) "Language Development--A Process of Children's Creative Construction" (Fatimah Haron); (7) "Socio-Emotional Development of Preschool Children" (Leonard Young); (8) "Parental Involvement in Promoting Physical Growth and Development of Children" (Wong Mee Lan); (9) "Parental Involvement in Children's Psychological Development" (Khoo Kim Choo); (10) "The Child, Health, and Child Care" (Khairuddin Yusof); (11) "Psychological Development In Child Care Centre" (Chiam Heng Keng); (12) "Children in Plantations" (A. Navamukundan); (13) "Maternal Employment and Child Care" (Tey Nai Peng); (14) "Physical Environment and Child Development" (Cheng Yin Mooi); (15) "Psychological Environment and Child Development" (Chiam Heng Keng); and (16) "Ecology of Young Child Nutrition in Malaysia" (Mirnalini Kandiah). Part 3 contains the reports of five workshops on, respectively, child care centers, maternal employment and child development, physical environment and child development, psychological environment and child development, and nutrition and child development. Two appendixes list the organizing committee and the conference program. (MDM)