Child psychopathology refers to the scientific study of mental disorders in children and adolescents. Oppositional defiant disorder, attention-deficit hyperactivity disorder, and autism spectrum disorder are examples of psychopathology that are typically first diagnosed during childhood.Child Psychopathology - 2nd Edition, Mash & Barkley Mental health providers who work with children and adolescents are informed by research in developmental psychology, clinical child psychology, and family systems. Lists of child and adult mental disorders can be found in the International Statistical Classification of Diseases and Related Health Problems, 10th Edition (ICD-10), published by the World Health Organization (WHO) and in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), published by the American Psychiatric Association (APA). In addition, the Diagnostic Classification of Mental Health and Developmental Disorders of Infancy and Early Childhood (DC: 0-3R) is used in assessing mental health and developmental disorders in children up to age five.

Causes The etiology of child psychopathology has many explanations which differ from case to case. Many psychopathological disorders in children involve genetic and physiological mechanisms, though there are still many without any physical grounds. It is absolutely imperative that multiple sources of data be gathered. Diagnosing the psychopathology of children is daunting. It is influenced by development and contest, in addition to the traditional sources. Interviews with parents about school, etc., are inadequate. Either reports from teachers or direct observation by the professional are critical. (author, Robert B. Bloom, Ph.D.) The disorders with physical or biological mechanisms are easier to diagnose in children and are often diagnosed earlier in childhood. As psychopathy exists on a spectrum, the initial indications of the disorder can differ greatly. Certain children may exhibit subtle indications as early as two or three years old, while in other children, symptoms may not come apparent unit later in life. It's also possible for signs to manifest before the age of two in some cases. However, there are some disorders, no matter the mechanisms, that are not identified until adulthood. There is also reason to believe that there is co-morbidity of disorders, in that if one disorder is present, there is often another.

Stress Emotional stress or trauma in the parent-child relationship tends to be a cause of child psychopathology. First seen in infants, separation anxiety in root of parental-child stress may lay the foundations for future disorders in children. There is a direct correlation between maternal stress and child stress that is factored in both throughout adolescent development.. In a situation where the mother is absent, any primary caregiver to the child could be seen as the "maternal" relationship. Essentially, the child would bond with the primary caregiver, and may exude some personality traits of the caregiver.

In studies of child in two age groups of pregnancy to five years, and fifteen years and twenty years, Raposa and colleagues (2011) studied the impact of psychopathology in the child-maternal relationship and how not only the mothers stress affected the child, but the child's stress affected the mother. Historically, it was believed that mothers who had post partum depression might be the reason their child has mental disorders both earlier and later in development. However this correlation was found to not only reflect maternal depression on child psychopathology, but also child psychopathology could reflect on maternal depression.

Children with a predisposition to psychopathology may cause higher stress in the relationship with their mother, and mothers who have psychopathology may also cause higher stress in the relationship with their child. Child psychopathology creates stress in parenting which may increase the severity of the psychopathology within the child. Together, these factors push and pull the relationship thus causing higher levels of depression, ADHD, defiant disorder, learning disabilities, and pervasive developmental disorder in both the mother and the child. The outline and summary of this study is found below: ""In looking at child-related stress, the number of past child mental health diagnoses significantly predicted a higher number of acute stressors for mothers as well as more chronic stress in the mother-child relationship at age 15. These increased levels of maternal stress and mother-child relationship stress at age 15 then predicted higher levels of maternal depression when the youth were 20 years old.

Looking more closely at the data, the authors found that it was the chronic stress in the mother-child relationship and the child-related acute stressors that were the linchpins between child psychopathology and maternal depression. The stress is what fueled the fires between mother and child mental health. Going one step further, the researchers found that youth with a history of more than one diagnosis as well as youth that had externalizing disorders (e.g., conduct disorder) had the highest number of child-related stressors and the highest levels of mother-child stress. Again, all of the findings held up when other potentially stressful variables, such as economic worries and past maternal depression, were controlled for.

Additionally, siblings- both older and younger and of both genders, can be factored into the etiology and development of child psychopathology. In a longitudinal study of maternal depression and older male child depression and antisocial behaviors on younger siblings adolescent mental health outcome. The study factored in ineffective parenting and sibling conflicts such as sibling rivalry. Younger female siblings were more directly affected by maternal depression and older brother depression and anti social behaviors when the indirect effects were not place, in comparison to younger male siblings who showed no such comparison. However, if an older brother were anti-social, the younger child- female or male would exude higher anti-social behaviors. In the presence of a sibling conflict, anti social behavior was more influential on younger male children than younger female children. Female children were more sensitive to pathological familial environments, thus showing that in a high- stress environment with both maternal depression and older- male sibling depression and anti social behavior, there is a higher risk of female children developing psychopathological disorders.. This was a small study, and more research needs to be done especially with older female children, paternal relationships, maternal-paternal-child stress relationships, and/or caregiver-child stress relationships if the child is orphaned or not being raised by the biological parent to reach a conclusive child-parent stress model on the effects of familial and environmental pathology on the child's development.

Temperament The child-parent stress and development is only one hypothesis for the etiology of child psychopathology. Other experts believe that child temperament is a large factor in the development of child psychopathology. High susceptibility to child psychopathology is marked by low levels of effortful control and high levels of emotionality and neuroticism. Parental divorce is often a large factor in childhood depression and other psychopathological disorders. This is more so when the divorce involves a long-drawn separation and one parent bad-mouthing the other. That is not to say that divorce will lead to psychopathological disorders, there are also other factors such as temperament, trauma, and other negative life events (e.g. death, sudden moving of home, physical or sexual abuse), genetics, environment, and nurture that correlate to the onset of a disorder. Research has also shown that child maltreatment may increase risk for various forms of psychopathology as it increases threat sensitivity, decreases responsivity to reward, and causes deficits in emotion recognition and understanding.Jaffee SR. Child maltreatment and risk for psychopathology in childhood and adulthood. Annual Review Clinical Psychology, 2017 May 8;13:525-551. Psychopaths states that up to 30% of the population exhibits varying levels of diminished empathy, a tendency towards taking risks, and an excessive sense of self importance.

Found in "The Role of Temperament in the Etiology of Child Psychopathology", a model for the etiology of child psychopathology by Vasey and Dadds (2001) proposed that the four things that are important to the development of psychopathological disorders is: 1) biological factors: hormones, genetics, neurotransmitters 2) psychological: self-esteem, coping skills, cognitive issues 3) social factors: family rearing, negative learning experiences, and stress 4) child's temperament. Using an array of neurological scans and exams, psychological evaluations, family medical history, and observing the child in daily factors can help the physician find the etiology of the psychopathological disorder to help release the child of the symptoms through therapy, medication use, social skills training, and life style changes.

Child psychopathology can cause separation anxiety from parents, attention deficit disorders in children, sleep disorders in children, aggression with both peers and adults, night terrors, extreme anxiety, anti social behavior, depression symptoms, aloof attitude, sensitive emotions, and rebellious behavior that are not in line of typical childhood development. Aggression is found to manifest in children before five years of age, and early stress and aggression in the parental-child relationship correlates with the manifestation of aggression. Aggression in children causes problematic peer relationships, difficulty adjusting, and coping problems. Children who fail to overcome acceptable ways of coping and emotion expression are put on tract for psychopathological disorders and violent and anti social behaviors into adolescence and adulthood. There is a higher rate of substance abuse in these children with coping and aggression issues, and causes a cycle of emotional instability and manifestation psychopathological disorders.

Neurology and etiology Borderline personality disorder (BPD) is one of many psychopathology disorders a child can develop. In the neurobiological scheme, borderline personality disorder may have effects on the left amygdala. In a 2003 study of BPD patients versus control patients, when faced with expressions that were happy, sad, or fearful BPD patients showed significantly more activation versus control patients. In neutral faces, BPD patients attributed negative qualities to these faces.. As stated by Gabbard, an experimenter in this study: "A hyperactive amygdala may be involved in the predisposition to be hyper vigilant and over reactive to relatively benign emotional expressions. Misreading neutral faces is clearly related to transference misreadings that occur in psychotherapy and the creation of bad object experiences linked with projective identification."