Bear in mind that bowlweevils is not an actual clinical psychologist. But he does have a PhD in cognitive psychology, a field that addresses expert decision-making including clinical diagnostics. He has provided analyses of clinical diagnostic accuracy in connection with litigation involving assessments of causation and severity of mental health disorders.
There is one particular flaw in the process that seemed rather common. When conducting a diagnostic interview on a potential patient, the guidance in the DSM states that this is a multi-step process. First, an assessment may be made as to whether a person has action and/or thought patterns that are associated with a mental health disorder. This should be followed by an assessment of the degree to which these action and/or thought patterns impact a person’s life. If the actions and thoughts have no, or minimal, negative impact, or even a positive impact, it would not be correct to state that a person is suffering from the mental health disorder that these thoughts and/or actions may be associated with.
Often, this assessment is not included in the diagnostic process. In other words, if you do things that are on the list of symptoms for a particular mental health disorder, you tend to be diagnosed as suffering from that mental health disorder, and are in need of some sort of treatment.
By failing to address impact on a person’s life, an overly high diagnosis rate occurs. Or at least an overly high estimate of proportion of the population in need of treatment for a mental health disorder occurs.
A comparison to a physical medical phenomenon may be helpful. Scoliosis is a deviation of the curvature of the spine from the normal, or ideal, range. There may be a very high rate of incidence of scoliosis in terms of there being a deviation in curvature of the spine that is noticeable by medical examination. This would mean that, technically, the rate of scoliosis in a population may be extremely high. Depending on the strictness of the range of curvature that is considered normal or ideal, it may be the case that a majority of a population may have some degree of scoliosis.
However, it will also likely be the case that most people with scoliosis do not suffer to any appreciable degree from the spinal deviation - no back pain, no difficulty engaging in the normal range of movement, and so on. It could even be the case that the spinal deviation allows for movements that are superior to the normal range.
In these situations, there would be no treatment necessary for the scoliosis. Perhaps there may be periodic questioning or examination to determine if the scoliosis has increased or has caused problems that were not present before. But in many cases, it would also be reasonable to say that most people who have a minor but medically noticeable deviation in spinal curvature do not have scoliosis. Or at least that they do not suffer from scoliosis.
Failure to engage in this type of assessment for mental health disorders results in overestimates of what most people would consider to be genuine cases of the disorder; i.e., that there is a negative effect on a person that requires treatment.
It is this type of failure that leads to the pondering as to whether having Asperger’s syndrome, or otherwise failing into the autism-spectrum range, may actually be a positive thing. And it may indeed be justifiable to say that some people do experience positive effects of the syndrome. But it may be more reasonable, and accurate, to say that they have action or thought patterns that are associated with autism but do not have autism.
So being able to focus on numerical information without being distracted by the social environment could be considered a symptom of autism or it could just be a useful skill. Determining which it is would involve examining the impact of this action pattern on a person’s life. If they cannot disengage and attend to social matters when needed, with the result of deterioration of important relationships, this would be harmful. But if they can disengage and attended to important relationships when needed but are not distracted by the conversation the people at the next table are having about vacation plans, this may be beneficial.
We associate a medical diagnosis with suffering, and rightly so. When clinicians divorce the presence of potential symptoms from suffering, the rate of incidence is artificially inflated.