A description of the four Ds when defining abnormality: •
Deviance is variation from statistical norms that result in a conflict with society. This term describes the idea that specific thoughts, behaviors and emotions are considered deviant when they are unacceptable or not common in society. Clinicians must, however, remember that minority groups are not always deemed deviant just because they may not have anything in common with other groups. Therefore, an individual's actions are defined as deviant when their behaviour is deemed unacceptable by the culture they belong to. However, many disorders have a relation between patterns of deviance and therefore need to be evaluated in a differential diagnostic model. •
Distress has to do with the discomfort that is experienced by the person with the disorder. This term accounts for negative feelings by the individual with the disorder. They may feel deeply troubled and affected by their illness. Behaviors and feelings that cause distress to individuals or to others around them are considered abnormal if the condition is upsetting to the person experiencing it. Distress is related to dysfunction in that it can be a useful asset in accurately perceiving dysfunction in an individual's life. However, these two are not always related because an individual can be highly dysfunctional while at the same time experiencing minimal
stress. The important characteristics of distress are the upsetting events themselves and the way one responds to them. •
Dysfunction involves maladaptive behavior that impairs the individual's ability to perform normal daily functions. It includes dysfunction in the psychological, biological, or developmental processes that are associated with mental functioning. This maladaptive behavior has to be significant enough to be considered a diagnosis. It is recommended to look for dysfunction across an individual's life experience because there is a chance the dysfunction may appear in clear observable view and in places where it is less likely to appear.
The p factor Benjamin Lahey and colleagues first proposed a general "psychopathology factor" in 2012, or simply "p factor". This construct shares its conceptual similarity with the
g factor of general intelligence. Instead of conceptualising psychopathology as consisting of several discrete categories of mental disorders, the p factor is dimensional and influences whether psychiatric symptoms in general are present or absent. The symptoms that are present then combine to form several distinct diagnoses. The p factor is modelled in the
Hierarchical Taxonomy of Psychopathology. Although researchers initially conceived a three-factor explanation for psychopathology generally, a subsequent study provided more evidence for a single factor that is sequentially
comorbid,
recurrent/chronic, and exists on a continuum of severity and chronicity. Higher scores on the p factor dimension have been found to be correlated with higher levels of functional impairment, greater incidence of problems in developmental history, and more diminished early-life brain function. In addition, those with higher levels of the p factor are more likely to have inherited a
genetic predisposition to mental illness. The existence of the p factor may explain why it has been "... challenging to find causes, consequences, biomarkers, and treatments with specificity to individual mental disorders." Alternatively, the p factor has also been interpreted as an index of general impairment rather than being a specific index that causes psychopathology. ==As mental symptoms==