Environment, parenting adaptation and early childhood development: evidence from a longitudinal survey in rural China

The present study investigates the relationship between birth season and early childhood development in low-income households, with a particular focus on caregivers’ ability to buffer children against environmental challenges. Using a longitudinal dataset of 866 children aged 7–11 months from underdeveloped rural areas in China, with four waves at six-month intervals, we found that winter-born children outperformed their summer-born counterparts by 0.30 and 0.37 standard deviations in cognitive and psychomotor development, respectively. These early advantages were primarily associated with more favorable feeding behavior and more time spent in social interaction at 7–11 months. We further identified a dynamic after-summer effect, whereby exposure to favorable seasonal conditions was associated with temporary boosts in psychomotor development. Additional analyses show that caregivers provided more interactive stimulation to winter-born children. These findings highlighted how seasonal environmental factors interact with constrained parental resources to generate early inequalities.