uncomfortable, it is the exceptional person themselves who will laugh it off to relieve social tension. A disabled person is given normal freedoms, but may not be able to show negative emotions. Lastly, society's rejection of deviance and the pressure to normalize may cause shame in some individuals. Abnormalities may not be included in an individual's sense of identity, especially if they are unwelcome abnormalities. When an individual's abnormality is labelled as a pathology, it is possible for that person to take on both elements of the sick role or the stigmatization that follows some illnesses. Mental illness, in particular, is largely misunderstood by the population and often overwhelms others' impression of the patient. Intrapersonal normality Most definitions of normality consider interpersonal normality, the comparison between many different individual's behaviors to distinguish normality from abnormality. Intrapersonal normality looks at what is normal behavior for one particular person (consistency within a person) and would be expected to vary person-to-person. A mathematical model of normality could still be used for intrapersonal normality, by taking a sample of many different occurrences of behavior from one person over time. Also like interpersonal normality, intrapersonal normality may change over time, due to changes in the individual as they age and due to changes in society (since society's view of normality influences individual peoples' behavior). It is most comfortable for people to engage in behavior which conforms to their own personal habitual norms. When things go wrong, people are more likely to attribute the negative outcome on any abnormal behavior leading up to the mishap. After a car crash, people may say "if only I didn't leave work early," blaming the crash on their actions which were not normal. This counterfactual thinking particularly associates abnormal behavior with negative outcomes. Behavioral normality In medicine, behavioral normality pertains to a patient's mental condition aligning with that of a model, healthy patient. A person without any mental illness is considered a normal patient, whereas a person with a mental disability or illness is viewed as abnormal. These normals and abnormals in the context of mental health subsequently create negative stigmatic perceptions towards individuals with mental illness. According to the Brain & Behavior Research Foundation, "an estimated 26.2 percent of Americans ages 18 and older—about 1 in 4 adults—suffer from one or more of (several) disorders in a given year." Though the population of American individuals living with mental illness