[Developmental Disorder Parenting Stressor Index (DDPSI): reliability and validity].

This study describes the development and evaluation of the Developmental Disorder Parenting Stressor Index (DDPSI). The DDPSI items were developed from a questionnaire survey of mothers (N = 255) of children with developmental disorders. A factor analysis identified four factors: (a) difficulty understanding the child and coping with the child's needs, (b) anxiety about the child's future and independence, (c) inadequate understanding of the child's disorder, and (d) conflicting emotions with regard to the child's disorder. These factors had high degrees of internal consistency. The concurrent validity of the DDPSI was examined. The DDPSI scores significantly correlated with the Stress Response Scale-18 and the Handicapped Child Parenting Stress Scale. The results of structural equation modeling analysis suggested that social support for the mothers mitigated the stressors' effect and reduced their psychological stress responses. The DDPSI is sufficiently reliable and valid to measure the stressors of parents of children with developmental disorders.