High Quality Content by WIKIPEDIA articles! Dyadic Developmental Psychotherapy is a treatment approach for families that have children with symptoms of emotional disorders, including Complex Trauma and disorders of attachment. It was originally developed by psychologist Daniel Hughes as an intervention for children whose emotional distress resulted from earlier separation from familiar caregivers. Hughes cites attachment theory and particularly the work of John Bowlby as theoretical motivations for dyadic developmental psychotherapy. However, other sources for this approach may include the work of Stern,who referred to the attunement of parents to infants' communication of emotion and needs, and of Tronick, who discussed the process of communicative mismatch and repair, in which parent and infant make repeated efforts until communication is successful.