A specialist mental capacity assessment can provide important evidence where illness, brain injury or cognitive impairment raises questions about an individual’s ability to make a particular decision. Under the Mental Capacity Act 2005, capacity is not a global judgment about whether somebody is generally capable or incapable. It must be considered in relation to the specific decision at the time it needs to be made.
Capacity Is About a Particular Decision
A person may be able to make some decisions independently while lacking capacity to make another, more complex decision.
The Mental Capacity Act requires a person to be presumed to have capacity unless established otherwise. They must also receive appropriate support to make the decision, and somebody cannot be treated as lacking capacity merely because their eventual choice appears unwise.
Where capacity is genuinely in question, the assessment considers whether an impairment or disturbance of mind or brain prevents the person from making the relevant decision. This includes considering their ability to understand, retain, use or weigh relevant information and communicate their decision.
Why Specialist Clinical Evidence May Be Needed
In complex cases, applying this framework may require considerably more than identifying a diagnosis.
Brain injury, dementia and other neurological or psychiatric conditions can affect memory, reasoning, executive functioning, insight and decision-making in different ways. Capacity may also fluctuate or change over time.
Specialist assessment can help establish how an individual’s clinical presentation relates to the particular decision being considered, rather than assuming incapacity simply because a diagnosis or impairment exists.
Depending on the case, appropriate expertise may come from Neuropsychology, Neuropsychiatry, Psychiatry or another relevant discipline.
Matching the Expert to the Capacity Question
At Medico-Legal Healthcare, we support solicitors in identifying appropriately experienced experts for complex capacity assessments.The objective is not simply to determine whether somebody has “capacity”. It is to provide carefully reasoned, decision-specific expert evidence that connects the legal framework with the individual’s clinical presentation.