Psychiatry - tests of cognitive function

The tools

Structured cognitive testing tools (e.g. Mini-Mental State Examination, Montreal Cognitive Assessment, and others) provide a standardised, reproducible assessment of cognitive domains (memory, attention, executive function, language, visuospatial ability) - supporting objective detection and monitoring of cognitive impairment beyond subjective clinical impression alone
Widely used across general medical, psychiatric, and geriatric practice whenever cognitive impairment is suspected or requires monitoring, given the value of a standardised, comparable measure over unstructured clinical impression

Different cognitive testing tools vary in their sensitivity to different types/severities of cognitive impairment - MoCA is generally more sensitive than MMSE for detecting milder cognitive impairment, particularly executive function deficits, reflecting differences in the specific cognitive domains and task difficulty each tool emphasises, which is why tool selection should be matched to the clinical question (screening for mild impairment vs monitoring more advanced, established dementia)

Test scores should always be interpreted in context - education level, language/cultural background, and sensory impairment (vision, hearing) can all affect performance independent of true cognitive function, risking both false-positive (impairment attributed incorrectly to genuine cognitive decline) and false-negative (impairment missed in a highly educated individual scoring within a "normal" range despite genuine decline from their premorbid baseline) misinterpretation
Serial testing (using the same tool consistently) tracks change over time more reliably than a single cross-sectional score alone

An identified cognitive impairment on structured testing should prompt further work-up for the underlying cause (see and related notes) rather than being treated as a diagnosis in itself
Test results should directly inform capacity assessment and care planning discussions where relevant, though a single test score alone is not sufficient for formal capacity determination

MoCA vs MMSE sensitivity difference (a frequently tested distinction, particularly for mild impairment/executive dysfunction), education/cultural background confounding test performance, serial testing for tracking change, test score vs formal capacity assessment distinction
MoCA is generally more sensitive than MMSE for detecting mild cognitive impairment, particularly executive function deficits, which is why MoCA is often preferred for earlier-stage screening, while MMSE remains more established for tracking more advanced dementia - test selection should be matched to the specific clinical question rather than defaulting to either tool regardless of the suspected severity and type of impairment

4 more sections, plus exam facts

Premium unlocks every note across every specialty, and the full exam fact library behind it.