Inclusion Criteria:  Children with ND:  Age between 3 and 24 months (chronologically or corrected in the case of children born preterm); mild to moderate developmental delay documented by clinical signs (e.g., symptoms of brain injury on neurological examination or neuroimaging) or by developmental scales (i.e., Griffiths III scales) associated with various diagnoses (e.g., cerebral palsy, prematurity); absence of genetic syndromes. The Griffiths III scale will be used to assess the child's overall level of development.  Typical developmental children:  birth to term; age between 3 and 24 months (chronological); absence of peri- or postnatal pathology.  Inclusion criteria for mothers (DN and typical development):  age above 18 years; good understanding of the Italian language; absence of cognitive difficulties and/or psychiatric disorders; no intake of psychotropic medications; not part of a single-parent family.  Exclusion Criteria: refer to the inclusion criteria.