The purposes of this research included 1) to study the relation between family determinants and child development in Cha-am District, Phetchaburi Province, 2) to examine the parental practices of families and identify the sets of institutional logics found in the field of child rearing, and 3) to investigate and analyze the sets of institutional logic in the child-rearing field related to developmental delay. Multiphase mixed-methods research applying qualitative and quantitative research was used for the research design. It was found that 33.3% ...