Capacity to Conduct Litigation: When Should It Be Considered?

Questions regarding capacity to conduct litigation can arise in a wide range of legal proceedings. Whilst most individuals involved in litigation are able to understand and participate in the legal process, some may experience difficulties that raise concerns regarding their ability to conduct proceedings effectively.

These cases often require careful assessment and may benefit from specialist neuropsychological input where cognitive impairment, neurological injury or neurodegenerative disease is present.

What Is Capacity to Conduct Litigation?

Capacity to conduct litigation refers to an individual's ability to understand, retain, use and weigh information relevant to legal proceedings and to communicate decisions regarding the conduct of the case.

The question is not whether a person has made good decisions, nor whether they understand every legal detail. Rather, it concerns whether they possess the mental capacity required to participate meaningfully in the litigation process.

Each assessment is specific to the decisions that need to be made and the circumstances of the individual case.

When Might Concerns Arise?

Concerns regarding litigation capacity may arise where an individual has:

• Acquired brain injury

• Stroke

• Dementia or other neurodegenerative disease

• Learning disability

• Significant cognitive impairment

• Neurological illness

• Complex psychiatric difficulties affecting decision-making

In some cases, concerns emerge because an individual struggles to understand legal advice or has difficulty retaining information discussed during meetings with solicitors. In others, family members, case managers or treating professionals may raise concerns regarding the person's ability to make informed decisions within the litigation process.

Why Does Capacity Matter?

Where a person lacks capacity to conduct litigation, the court may require a Litigation Friend to be appointed. The Litigation Friend makes decisions on behalf of the individual and conducts proceedings in their best interests.

Establishing whether capacity is present is therefore an important procedural issue which may have significant implications for the progression of the case.

What Is the Role of the Neuropsychologist?

A Clinical Neuropsychologist can assess the cognitive abilities that underpin decision-making and participation in legal proceedings.

This may include consideration of:

• Memory

• Attention and concentration

• Executive functioning

• Information processing speed

• Reasoning and judgement

• Ability to understand and apply information

• Communication abilities

The assessment considers not only test performance but also how any cognitive difficulties affect real-world decision-making.

The Importance of Functional Assessment

Capacity assessments are not based solely on psychometric test scores. Two individuals may obtain similar test results whilst functioning very differently in everyday life.

A neuropsychological assessment therefore considers:

• Clinical interview findings

• Behavioural observations

• Medical evidence

• Educational and occupational history

• Day-to-day functioning

• The specific demands of the litigation process

This allows opinions to be grounded in both cognitive assessment and practical reality.

Brain Injury and Litigation Capacity

Questions regarding litigation capacity frequently arise following acquired brain injury.

Some individuals experience difficulties with:

• Retaining information

• Understanding complex advice

• Evaluating risks and benefits

• Planning and organisation

• Impulse control

• Decision-making

These difficulties may not always be immediately apparent during routine conversations, making specialist assessment particularly valuable.

Capacity Is Decision-Specific

An important principle is that capacity is not an all-or-nothing concept.

A person may have capacity in one area of decision-making whilst lacking capacity in another.

For example, an individual may be capable of managing day-to-day personal decisions but experience difficulties understanding and weighing the complex information involved in litigation.

Each assessment therefore focuses on the specific decisions relevant to the proceedings in question.

When Should a Solicitor Consider Assessment?

A neuropsychological assessment may be helpful where:

• Cognitive difficulties are reported or observed

• There is a history of brain injury or neurological illness

• The client struggles to understand legal advice

• Family members raise concerns regarding decision-making

• A Litigation Friend may be required

• Capacity is disputed by another party

Early consideration of these issues can help avoid delays and ensure that appropriate procedural arrangements are put in place.

Capacity to conduct litigation is an important legal question that may arise in cases involving cognitive impairment, neurological injury or neurodegenerative disease. Where concerns exist, specialist neuropsychological assessment can provide an objective evaluation of the cognitive abilities relevant to litigation and assist the court in determining whether the individual has capacity to conduct proceedings.

Further Information

For an overview of expert witness services for solicitors click here.

Dr Vikki Hunkin is a Consultant Clinical Neuropsychologist providing independent expert witness services to solicitors across England and Wales. Her medico-legal work includes neuropsychological assessment and reporting in personal injury, clinical negligence, and capacity matters.

For further information, see the For Solicitors page.