People with obsessive compulsive disorder (OCD) are preoccupied with certain distressing thoughts and feel pressured to behave in certain ways. Compulsive acts usually block the anxiety caused by the obsession. Obsessions are disturbing images, thoughts, or urges that invade a person's stream of consciousness. Compulsions are repetitive behaviors that a person feels compelled to do. There are various themes of obsessions and compulsions, the most common being contamination, order/symmetry, harm or injury, sex, violence, and religion (Taylor et al., 2010). Research indicates that learning through developmental relationships (parent-child), may explain the onset of OCD symptoms in adulthood. There are three styles of parental authority, permissive, authoritarian and authoritarian, which differ on the dimensions of nurturing and behavioral control. Parents who use the permissive style allow their children to do whatever they want with little discipline, while authoritative parents use reasonable guidelines while providing a nurturing environment. The authoritarian style is parenting that values ​​strict adherence to rules with low levels of education. The researchers' results indicated that authoritarian parenting style was associated with both OC symptoms and OC beliefs (Timpano, 2010). The current study's research aims to find the origins of cognitive dysfunctions that have been found to be involved in adult and childhood forms of OCD. This study addresses two limitations of the method, the comparison between OCD-related maladaptive beliefs in people with OCD and their family members. The sample consisted of children diagnosed with OCD, rather than unselected adolescents (Jacobi et al., 2006) or adults with OCD (Rector et al., 2009). Beliefs in the pediatric OCD sample were examined in relation to a group of first-degree relatives (mothers). The current study then applied measures of OCD-related beliefs to assess the cognitions of children and their mothers. A child version of the 44-item Adult Obsessive Beliefs Questionnaire was used to compare dysfunctional beliefs in children and their parents (Coles and colleagues, 2009). With research conducted by Jacobi et al. (2006) and Rector et al. (2009), they hypothesized that the relationship between mother and child beliefs related to threat and responsibility would be positively correlated. Building on the findings of Coles and colleagues (2009), they hypothesized that correlations between mother and child beliefs regarding the importance and need to control one's thoughts would also be positive . The data presented are from the first study examining the relationship between OCD-related beliefs in children with OCD and their biological parents (mothers).