Introduction: Confusion is a concept derived from following. This study aimed to identify the causes and types of confusion in the treatment of parents who have children with developmental disorders.
 Materials & Methods: The questionnaire was designed to investigate the causes of confusion and was completed by 350 parents of children who were purposefully selected. The obtained data were analyzed by factor analysis method, and then the relationship between each of factors and the amount of confusion were analyzed using log-linear analysis method.
Findings: Results indicated that factors such as control, beliefs, interaction of therapist client and access to confusion treatment in the type of inter-special, and factors such as beliefs, socio-cognitive factors and interaction of therapist - client can predict the delay in referring to therapist. The investigations showed that the most common cause of confusion was social–cognitive factor, and the least common was commitment factor.
Discussion & Conclusion: Causes of confusion are the result of a combination of intrapersonal and environmental factors which confirm the necessity of individual counseling as well as informing parents and health officials to help families of children with developmental disorders.