In the United Kingdom, GPs routinely screen memory and thinking in patients over 65 – even when nobody reports any problems. Cognitive function testing is a short, non-invasive procedure that can detect changes in brain performance years before obvious symptoms appear. Early detection opens the door to interventions that may slow the decline of mental sharpness. Find out how the assessment works and when it’s worth having one!

Key facts about cognitive function testing:

Testing typically takes 15-45 minutes and requires no preparation
Tests assess memory, attention, language and spatial orientation
Early detection of changes offers the chance for effective intervention
Regular assessments after the age of 50 help track changes over time
A single test result doesn’t determine a diagnosis – the full clinical picture matters

Who should have their cognitive functions tested?

Anyone over 50 should consider regular cognitive function testing, even without noticeable memory problems.

This applies particularly to those with risk factors – hypertension, diabetes, depression or a family history of dementia. Many cognitive impairments develop slowly and go unnoticed for years. The person affected often doesn’t spot the changes because the brain compensates for deficits. Screening picks up subtle signals that are easily confused with tiredness or stress.

Groups that should be tested regularly:

People over 65 – even without symptoms, as a routine screening
Those with hypertension or diabetes – these conditions accelerate cognitive decline
People with a history of head injuries – even past concussions increase the risk
Those with depression or chronic stress – both affect memory and concentration
Relatives of dementia patients – genetics account for part of the risk

What does a cognitive function assessment look like?

A standard assessment consists of simple tasks carried out in a doctor’s surgery or psychologist’s office. It requires no needles, equipment or special preparation – just focus and a calm environment.

The clinician asks the patient to memorise a list of words, draw a clock, name objects shown to them or perform simple calculations. Each task evaluates a different area of brain function. The whole process takes from 15 minutes for a brief screening to 45 minutes for a full neuropsychological evaluation.

Which tests are used most often?

The MMSE (Mini-Mental State Examination) and MoCA (Montreal Cognitive Assessment) are the two most widely used screening tools worldwide. MMSE checks orientation in time and place, short-term memory, arithmetic ability and comprehension of instructions – the maximum score is 30 points. MoCA is more sensitive to early cognitive changes and better at detecting mild impairments that the MMSE might miss.

Can the assessment be done online?

Digital versions of cognitive tests are available, but their reliability depends on the conditions under which they are taken. Testing in the controlled environment of a surgery remains the gold standard. Online tools can serve as a preliminary self-assessment, but they don’t replace professional diagnosis – noise, distractions or technical issues can distort results.

What exactly do cognitive tests measure?

Cognitive tests evaluate several distinct domains of brain function – memory, attention, executive functions, language and visuospatial abilities. Each function engages different brain structures, so a decline in one domain doesn’t automatically mean problems in the others.

Main domains assessed in testing:

Episodic memory – the ability to store new information and events, usually the first to weaken
Attention and concentration – the capacity to focus on a task for an extended period
Executive functions – planning, organising, decision-making and flexible thinking
Language – naming objects, verbal fluency, comprehension of complex instructions
Visuospatial abilities – spatial orientation, drawing and shape recognition

Results are compared against norms for a given age group and education level. Dr James Rowe, a neurologist at the University of Cambridge, stresses that a single test is a snapshot – only a series of assessments over time reveals whether changes are progressing or remain stable. This is why biological age versus chronological age takes on particular significance when it comes to brain health.

Regular cognitive assessments – when to start and how often?

Regular monitoring of cognitive function allows changes to be detected before they become apparent in daily life. An assessment carried out once a year or every two years creates an individual baseline – a reference point against which future results are evaluated.

Signs that should prompt an earlier visit:

Recurring difficulty finding words in everyday conversations
Getting lost in familiar places or problems with spatial orientation
Difficulty planning activities that previously posed no challenge
Frequently forgetting appointments or important events

From what age is it worth testing cognitive functions?

A first screening is worth having between the ages of 50 and 55 – even without symptoms. After 65, assessments should become routine, every one to two years. Those with risk factors may want to start earlier, as cognitive decline can begin 10-15 years before obvious symptoms appear.

What to do when test results are concerning?

A concerning screening result doesn’t mean a dementia diagnosis. It’s a signal to pursue further investigation – a full neuropsychological assessment, brain MRI and blood tests to rule out reversible causes of cognitive decline, such as vitamin B12 deficiency or hypothyroidism.

Reversible causes of declining results:

Depression and anxiety – mood disorders can mimic the symptoms of early dementia
Vitamin B12 deficiency – causes problems with memory and concentration
Hypothyroidism – slows thought processes and impairs attention
Medication side effects – certain sleeping pills and anxiolytics reduce cognitive performance
Insomnia – chronic sleep deprivation impairs memory consolidation

A 2019 study published in The Lancet Neurology showed that early intervention in people with mild cognitive impairment – combining physical activity, diet, cognitive training and cardiovascular risk management – slows deterioration by 25-30% compared with no action.

How to support cognitive functions every day

Protecting cognitive functions doesn’t start in a neurologist’s consulting room. 150 minutes of movement per week, a diet rich in omega-3 fatty acids and polyphenols, and 7-8 hours of sleep form the foundation on which the brain recovers effectively. Neuroplasticity and brain changes occur at every age – the brain of a 70-year-old who regularly learns and exercises forms new synaptic connections just as effectively as that of a younger person. Learning a language, playing an instrument, and even daily conversations engage multiple brain areas simultaneously and slow cognitive decline.

FAQ: Frequently asked questions about cognitive function testing

Is cognitive function testing painful?

Cognitive function testing consists of verbal and written tasks with no physical invasion whatsoever – it involves no pain, injections or medical equipment.

How long does a cognitive function assessment take?

A brief screening test (MMSE or MoCA) takes 10-15 minutes, whilst a full neuropsychological evaluation covering several cognitive domains requires 30-90 minutes.

Can a GP refer someone for testing?

A GP can carry out a preliminary screening test in the surgery and, if results are concerning, refer the patient to a neurologist or neuropsychologist for a more detailed assessment.

References:

Ngandu, T. et al. (2015). A 2 year multidomain intervention of diet, exercise, cognitive training, and vascular risk monitoring versus control to prevent cognitive decline in at-risk elderly people (FINGER). The Lancet. https://doi.org/10.1016/S0140-6736(15)60461-5
Nasreddine, Z. S. et al. (2005). The Montreal Cognitive Assessment, MoCA: A Brief Screening Tool For Mild Cognitive Impairment. Journal of the American Geriatrics Society. https://doi.org/10.1111/j.1532-5415.2005.53221.x
Livingston, G. et al. (2020). Dementia prevention, intervention, and care: 2020 report of the Lancet Commission. The Lancet. https://doi.org/10.1016/S0140-6736(20)30367-6