AbstractThe present study adopts a quasi-experimental design to evaluate the impact of perceived parental differential treatment towards 30 non-disabled siblings of children with cerebral palsy 7–10 years of age. Standardised inventories such as, the Stanford-Binet Intelligence Test (SBIT), the Connors Parent Rating Scale-Revised (CPRS) and the Draw-a-Family test were used pre and post intervention. Scheduled interviews were used for parents and children to obtain information regarding family cohesiveness. A special program was designed to structure the home environment and to maximise parental involvement that catered to the “needy child” and this was implemented for 6 months after which the children were reassessed. Prior to the intervention, we observed deficits in cognitive skills and siblings had concerns in hyperactivity and oppositional behaviour. Scheduled interviews with siblings elicited responses that represented neglect, perceived differential treatment and negative emotional well-being. Projective tests revealed that family dynamics were disturbed and chaotic. Post intervention, we observed significant differences in the cognitive orientation, behavioural engagement and also in the interpersonal relationship within the family. We may conclude therefore, that parental involvement significantly predicts academic and psychosocial adjustment of siblings and this is an important implication for practitioners in developing early intervention programs.