Gardner, F., Leijten, P., Melendez-Torres, G.J, Landau, S., Harris, V., Mann, J., Beecham, J., Hutchings, J., Scott, S. (2018). The Earlier the Better? Individual Participant Data and Traditional Meta-analysis of Age Effects of Parenting Interventions. Child Development 90(1):7-19 https://doi.org/10.1111/cdev.13138 Abstract Strong arguments have been made for early intervention for child problems, stating that.
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