A young child's stress-sensitive neurobiological system is immature and open to being shaped by experience. When children enter preschool, external demands on them to adjust are different from the demands they experience at day care. In Finland, the last year before children transfer to the comprehensive school is called preschool. The preschool…

The aim of this study was to evaluate the influence of early educational quality on children's cortisol levels. It was hypothesised that the environmental stressors might load children's immature stress regulative systems thus affecting their diurnal cortisol levels. The study sample consisted of 146 preschool-aged children. Cortisol was measured…