Loading...
Printed on 7/21/2026
For informational purposes only. This is not medical advice.
The Memory Impairment Screen (MIS) is a brief controlled-learning memory screen using delayed free recall and category-cued recall. Total score ranges from 0 to 8, with lower scores indicating stronger memory-impairment signal.
Formula: MIS total ranges 0-8 from weighted delayed free recall and cued recall.
Save your results with a free account
Keep a history of calculations, favorite tools, and access your dashboard anytime.
Read four unrelated words to the patient (e.g., checkers, saucer, telegram, anchor). Critically, the Memory Impairment Screen uses a controlled learning paradigm — each word is presented with a semantic category cue to ensure adequate encoding. For example: 'I am going to read four words and a clue for each word. When I say a clue, tell me which word fits. Ready? The word is checkers. It belongs to the category of games. What word belongs to the category of games?' This semantic cuing at encoding is the key innovation of the MIS — it controls for encoding failures that would confound pure recall tests, making the MIS specifically sensitive to retrieval deficits characteristic of Alzheimer's disease.
After presenting all four words with their category cues, perform a 2 to 3 minute distractor task (typically counting backward or naming animals) to prevent active rehearsal. Then ask the patient to recall as many of the four words as possible without cues: 'Can you remember the four words I read to you?' Record the number of words recalled freely (0 to 4). Free recall score is weighted by a factor of 2 in the MIS-T (total) scoring formula, reflecting its higher diagnostic weight.
For any words not recalled freely, provide the original semantic category cue: 'One word was in the category of games — can you remember it?' Record cued recall score (0 to 4, only counting words NOT recalled freely). Calculate MIS-T = (free recall x 2) + cued recall. Maximum MIS-T = 8. A score of 5 or above is generally considered normal; 4 or below is a positive screen for memory impairment. The MIS-T of 4 or below has approximately 80 percent sensitivity and 96 percent specificity for Alzheimer's disease dementia, making it one of the most specific brief memory screens available.
Primary care physicians, nurse practitioners, family physicians
The MIS is highly practical for primary care dementia screening due to its brief 4-minute administration time, minimal equipment requirements, and excellent diagnostic accuracy. Unlike the MMSE or MoCA, which cover multiple cognitive domains and take 10 to 15 minutes, the MIS focuses specifically on episodic memory — the cognitive domain most affected in early Alzheimer's disease and most predictive of progression from MCI to dementia. The MIS can be administered by trained medical assistants or nurses before the physician encounter, enabling efficient cognitive triage in busy primary care settings.
Geriatricians, neurologists, geriatric psychiatrists, memory clinic staff
The MIS was specifically designed and validated for Alzheimer's disease detection, exploiting the finding that AD preferentially impairs hippocampal-dependent episodic memory retrieval even when encoding is controlled. The controlled learning paradigm — presenting words with semantic cues at encoding — ensures that encoding failure does not mask a true retrieval deficit. MIS-T of 4 or below has demonstrated 80 percent sensitivity and 96 percent specificity for Alzheimer's dementia in multiple validation studies. The high specificity is particularly valuable — a positive MIS screen strongly suggests true memory impairment rather than false positive from anxiety or inattention.
Memory clinic physicians, geriatric psychiatrists, neuropsychologists
The MIS shows good sensitivity for amnestic MCI — the preclinical stage of Alzheimer's disease most associated with progression to dementia. Serial MIS assessment detects memory decline trajectory in MCI patients, providing objective data to support the clinical determination of MCI-to-dementia transition. In research contexts, the MIS has been used as a brief memory outcome measure in clinical trials targeting MCI and early Alzheimer's disease. Longitudinal neuropathology studies have demonstrated that antemortem MIS performance correlates with postmortem Alzheimer pathology burden.
Memory clinic coordinators, geriatric assessment nurses, memory clinic physicians
The MIS is well-suited for memory clinic intake triage — it identifies patients with significant episodic memory impairment before the full diagnostic appointment, allowing efficient allocation of testing resources. Patients screening positive on MIS are prioritized for full neuropsychological assessment, neuroimaging, and specialist evaluation. The brief administration time allows integration into pre-clinic nursing assessments or waiting room administration, optimizing clinical workflow. Unlike longer cognitive screens, the MIS's specific memory focus enables it to function as a targeted pre-screen for amnesia-type memory disorder.
Primary care providers, geriatric health maintenance programs, Medicare wellness programs
The MIS is a practical option for the annual Medicare Wellness Visit cognitive assessment requirement, offering valid cognitive screening in under 5 minutes. Its high specificity (96 percent) means that patients who screen positive warrant follow-up evaluation, while negative results provide genuine reassurance. For patients with subjective memory complaints who screen negative on MIS, documenting the MIS result and adding it to the longitudinal medical record establishes a cognitive baseline for future comparisons if symptoms progress. Annual MIS tracking in at-risk patients (family history, mild subjective complaints) detects early trajectory changes before severe impairment.
The MIS is not simply a word recall test — it is a controlled learning word recall test. The semantic cuing at encoding controls for encoding variability between patients, isolating retrieval deficits as the primary source of score differences. This is the key methodological innovation: patients with Alzheimer's disease encode words adequately with cues (they can repeat the word when told the category) but fail to retrieve them later without cues (free recall) and often fail even with cuing (indicating a true retrieval and storage failure). This pattern is distinctive of hippocampal dysfunction in Alzheimer's.
The validated clinical threshold is MIS-T of 4 or below = positive screen. At this threshold, the MIS achieves approximately 80 percent sensitivity and 96 percent specificity for Alzheimer's dementia. The very high specificity means that a positive MIS screen is a strong signal — false positives are uncommon compared to less specific screens. Clinicians can interpret a positive MIS with high confidence as a true positive memory impairment signal warranting follow-up evaluation.
The cued recall component — giving the semantic category cue for words missed on free recall — is diagnostically critical. Patients with Alzheimer's disease typically fail to benefit significantly from cues (cued recall is also low), which distinguishes their pattern from patients with frontal-subcortical disorders who may recall very few words freely but recall significantly more with cues. A patient who recalls 0 words freely but recalls 3 of 4 with cues has a different profile (and different likely etiology) than one who recalls 0 freely and 0 with cues.
The 2 to 3 minute distractor task between encoding and recall is essential — it prevents the patient from actively repeating the words during the delay period. Without a distractor task, brief word lists can be recalled through working memory rather than episodic memory, which significantly reduces the sensitivity for detecting hippocampal memory impairment. Use the same standardized distractor (counting backward, animal naming) consistently to ensure valid serial comparisons.
Like most verbal memory tests, MIS performance is influenced by educational attainment and language ability. Very low education (below 8 years of formal schooling) and non-native language speakers may score lower than the threshold without having true memory impairment. In these populations, apply the MIS threshold with caution and supplement with culturally adapted tests or direct neuropsychological assessment. Higher education raises the threshold for concern — a highly educated individual scoring 5 may warrant monitoring if their history suggests recent decline.
MIS score interpretation should always incorporate the informant or patient history of cognitive change. A MIS of 4 in a patient with a 3-year history of progressive memory complaints and IADL decline is clinically much more significant than a MIS of 4 in a medically complex patient with acute illness, depression, and medication side effects. The MIS threshold identifies who warrants further evaluation — the clinical history determines the urgency and focus of that evaluation.
The MIS has rare validation through post-mortem neuropathology correlation. Verghese et al. (2003) demonstrated that lower MIS scores predicted greater neurofibrillary tangle burden in post-mortem Alzheimer's brain tissue — a direct biological validation of the MIS as a marker of Alzheimer's pathology. This neuropathological validation provides unusually strong evidence for a brief screening tool's validity as a true biomarker of the underlying disease.
The MIS requires sustained attention during both word encoding and the distractor task. Noisy waiting rooms, interruptions, or competing conversations during administration can impair encoding and inflate the false positive rate. Always administer the MIS in a quiet room with only the clinician and patient (and optionally one observer/caregiver who should remain silent during the test). Document any environmental distractions that occurred during the test.
MIS was developed as a brief, high-discrimination dementia screening test using controlled learning and delayed recall paradigms.
Lower MIS scores indicate greater memory impairment signal and support deeper dementia workup.
Use as a brief memory-focused screen in outpatient, primary-care, or geriatric assessments where fast triage is needed.
As a focused memory screen, MIS does not fully capture executive, language, visuospatial, or functional domains.
Disclaimer: This tool is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about your health.
April 21, 2026 · trust-baseline
Clinical trust metadata enabled for this tool page with structured review/version fields.
Rapid cognitive screening with the Six-Item Cognitive Impairment Test (6CIT), weighted score range 0-28.
OpenGeriatricsScreen for cognitive impairment using the 8-item AD8 informant interview (score 0-8).
OpenMental HealthInterpret Montreal Cognitive Assessment (MoCA) scores. The leading cognitive screening tool for mild cognitive impairment and dementia.
OpenGeriatricsClassify SLUMS cognitive-screen totals (0-30) to support triage for fuller neurocognitive evaluation.
Open