Ability In Dementia Research Articles

A call for globally responsive screening materials to account for heterogeneity in dementia syndromes.

Effective screening for communicative ability in dementia is vital to drive theoretical understanding and optimize care responsiveness globally. Communication is central to the human experience; however, routine clinical screening for progressive communication change remains limited due to a variety of resource constraints. Other challenges include the subtlety of early communication-led symptoms, heterogeneous underlying pathologies, and a lack of culturally diverse research and tools. To address the scarcity of dedicated assessment resources, future initiatives must maximize responsiveness to and representation of our global population to appropriately respond to the rising, and vastly diverse, dementia crisis.

In constant search of the good: a qualitative study into insiders' perspectives on living well with dementia.

The new concept of 'living well with dementia' is currently gaining traction in practice, policy, and research. However, people with dementia and their carers' own understanding of this concept has not received much scholarly attention. This is because empirical studies into living well with dementia are predominantly quantitative; there are only a few qualitative studies on this topic. This study therefore sets out to investigate what living well means for 'insiders' in an everyday context. To explore insiders' own perspectives on living well with dementia, we conducted interviews and focus group discussions with 21 dementia stakeholders. The study included ten individuals with mild-to-moderate dementia living at home, five family carers who are or have been involved in the care for a person with dementia, and six health and social care professionals. Living well with dementia, for our study participants, revolves around shaping their daily lives according to their values. In this sense, living well with dementia is no different than without. As it involves the values of the person with dementia and those of their social network, living well is both an individual and a collective concern. Having dementia undermines people with dementia's ability to substantiate their values, but it is still possible to live well. As they attempt to shape living well with dementia, respondents encounter tensions within the social network and within the person with dementia. To handle these tensions, they work for mutual attunement by using sensitivity and switching between leading and following in social interactions. Living well with dementia in a daily context is a dynamic process in which people with dementia, family carers, and professionals constantly seek the good together. This insight contributes to a better understanding of stakeholders' ongoing, invisible efforts to mutually attune. It may also help bypass dichotomizing approaches to dementia. Finally, it opens up new venues for research into reciprocity in the care collective. The article closes with recommendations to improve dementia care and support in light of these findings.

Conversation coaching in dementia: a feasibility study.

Conversation abilities of people with dementia are impacted by cognitive-communication deficits. Communication interventions can improve quality of life by increasing positive interactions and well-being. This study evaluates the feasibility of a conversation coaching intervention for people with dementia and their communication partners. A mixed-method design was used. Thirty-four people were recruited over 12months; 17 people with dementia and 17 communication partners. Participants with dementia were aged between 62 and 79years (8 females, 9 males) and the communication partners were aged 33-77years (5 males, 12 females). This conversation coaching intervention involved two assessment sessions (pre and post intervention) and 6 weekly sessions, alternating between individual and group-based sessions. These were facilitated by two experienced speech and language therapists with a three-month follow-up period. Participants were assessed initially and three months following intervention using Profiling Communication Ability in Dementia (P-CAD), Goal Attainment Scaling, and Capability Index for Older people (ICECAP-O). Twenty-eight participants completed the conversation coaching intervention. P-CAD scores for people with dementia were maintained at three months for 71% (n = 10) showing no decline in function and 29% (n = 4) showed improvement. Using the Goal Attainment Scaling, all people with dementia and their communication partners reported that this conversation coaching intervention helped them achieve their individual communication goals. Ten (71%) people with dementia rated their well-being as higher on the ICE-CAP-O following intervention with 29% (n = 4) rating no change in well-being from initial assessment. Over three-quarters of communication partners, (79%: n = 11), reported an increased sense of well-being following intervention and 21% (n = 3) had no change in well-being. Preliminary outcomes including participant feedback indicate that this conversation coaching intervention is feasible for people with dementia. The communication function and well-being of people with dementia were either maintained or improved. Conversation coaching intervention is collaborative and enhances the retained communication abilities of people living with dementia.

Vocabulary changes in adulthood: Main findings and methodological considerations.

Vocabulary scores increase until approximately age 65 years and then remain stable or decrease slightly, unlike scores on tests of other cognitive abilities that decline significantly with age. To review the findings on ageing-related changes in vocabulary, and to discuss four methodological issues: research design; test type; measurement; and vocabulary ability as a proxy for general intelligence. A discussion of cross-sectional and longitudinal research designs shows that cohort membership accounts for some but not all ageing-related changes in vocabulary, and that drop-out and test-retest effects do not alter conclusions regarding these changes. Test type affects age trends in vocabulary, and if researchers use only one test, they should choose a multiple-choice synonym test. While some authors suggest that vocabulary tests do not measure the same underlying ability in younger and older adults, more research of this suggestion is needed. A brief examination of the use of vocabulary ability as a proxy for general intelligence in healthy ageing and for premorbid abilities in dementia indicates that such practice is often questionable. Vocabulary knowledge increases through the mid-60s regardless of measurement method. However, there is little information on how word knowledge serves other verbal skills in old age, how and when adults learn new words, or how much exposure is necessary for meanings to remain in storage for a lifetime. Research of these issues may require new methodologies, as well as novel theoretical accounts of ageing-related effects on vocabulary. What is already known on this subject Unlike many cognitive abilities that decline with ageing, vocabulary knowledge continues to increase until approximately age 65, and then remains stable or decreases slightly. These findings have been replicated in different research designs and across languages. What this paper adds to existing knowledge The article presents a summary of findings on changes in vocabulary across adulthood, and a discussion of four key methodological issues: research design, test type, measurement, and the use of vocabulary ability as a proxy for general intelligence. What are the potential or actual clinical implications of this work? To better understand changes in vocabulary knowledge across adulthood, clinicians must be aware of methodological considerations that affect the field. Such considerations have direct clinical implications regarding the choice of vocabulary tests and their use as a proxy for other abilities in both healthy older adults and in individuals with dementia.

149 A PROFILE OF THE COMMUNICATION NEEDS OF NEW PATIENTS ATTENDING A MEMORY ASSESSMENT AND SUPPORT SERVICE

Abstract Background Communication is a key factor in maintaining quality of life and well-being. This is of core importance for people with dementia who experience changes to their communication abilities. The role of the Speech and Language Therapist working with people with dementia is well documented. Speech and Language Therapists support people with communication and swallowing disorders however in practice the focus is often on swallowing disorders with less emphasis on communication. The recommended allocation of Speech and Language Therapy (SLT) for a Memory and Support Service (MASS) is 0.5 Senior Speech and Language Therapist. A pilot SLT service was trialled in a MASS to identify the SLT service needs and the benefit of introducing SLT earlier for people with Dementia. Methods A retrospective caseload review was completed of ten patients seen by SLT as part of the MASS assessment. Communication profiles and SLT interventions were analysed. Results The majority of the ten patients reviewed self-reported communication and speech and language changes, such as word finding difficulties and difficulties understanding conversations. Patient's self-report often corresponded with formal assessment results. On formal assessment 30% of patients presented with slight cognitive-communicative changes and 30% of patients presented with slight-mild cognitive-communicative changes. 10% of patients presented with mild cognitive-communicative changes and 30% of patients presented with mild-moderate cognitive-communicative changes. SLT interventions included conversational strategies, language strategies, language tasks and conversation partner training. 50% of patients were referred to Primary Care SLT. Conclusion SLT interventions support patients’ cognitive-communication abilities in dementia. SLT within a MASS adds clinical value by supporting assessment and diagnosis of dementia and developing patients’ communication profiles to highlight communicative abilities. Furthermore, SLT input supports developing communication strategies for the patient and communication partner training. In summary these interventions support improved quality of life and well-being for the person with dementia and their family.

121 The Queen Square tests of auditory cognition: defining hearing deficits and dis- ability in dementia

BackgroundHearing impairment has emerged as a potent association of cognitive decline in dementia and a promising treatment target. To realise this promise, we need to resolve fundamental questions concerning the roles of peripheral versus central auditory deficits in different dementias.MethodsUsing a novel psychoacoustic battery – the Queen Square Tests of Auditory Cognition (QSTAC)– we combined pre-existing and novel measures of peripheral and central hearing functions, to charac- terise discrete ‘auditory phenotypes’ across dementia syndromes. Customised auditory symptom ques- tionnaires (completed by patients’ caregivers) were used to capture daily-life hearing-related disability and care burden. Patient groups: Alzheimer’s disease, frontotemporal dementia, primary progressive aphasia (PPA) and control. Neuroanatomical associations of specific hearing deficits were assessed using voxel-based morphometry.ResultsSyndromic signatures of peripheral and central auditory dysfunction were identified. Alzheimer’s disease was associated with prominent impairments of auditory scene analysis and dichotic listening. PPA syndromes and behavioural variant FTD (BvFTD) were principally associated with deficits of sound pattern analysis, sound identity, emotion recognition and degraded speech perception, which stratified according to sub-syndrome (logopoenic, semantic, nonfluent).ConclusionsTaken together, our findings suggest that major dementias have characteristic and differenti- ated auditory phenotypes, reflecting a complex interplay of peripheral hearing and auditory cognitive dysfunction.jeremy.johnson@doctors.org.uk

A New and Tidier Setting: How Does Environmental Clutter Affect People With Dementia's Ability to Perform Activities of Daily Living?

The relationship between the physical environment and the person with dementia's (PwD) activities of daily living (ADLs) task performance is controversial. Although the general assumption is that this population benefits from their home environment when performing ADLs, very few experimental studies have been conducted to date. The aim was to investigate the influence of the environment (home vs. Research-lab) and the role of clutter on ADL performance. Sixty-five PwD were evaluated with a performance-based ADL assessment (at home and clutter-free Research-lab). Paired t tests compared ADL performance and level of clutter in both environments. Multiple regression analysis investigated factors associated with better ADL performance. Overall, PwD performed better at home even though clutter was significantly lower in the Research-lab. When stratified by dementia stage, PwD in the moderate stage of the disease performed better at home. Absence of clutter in the Research-Lab did not appear to play a beneficial role in ADLs. When stratified by dementia stage, only PwD in the moderate stage appeared to benefit from their home environment when performing ADL tasks. Future studies are required to elucidate the wider role of the environment in supporting engagement in daily activities in different dementia stages.

LEAP Motion Technology and Psychology: A Mini-Review on Hand Movements Sensing for Neurodevelopmental and Neurocognitive Disorders.

Technological advancement is constantly evolving, and it is also developing in the mental health field. Various applications, often based on virtual reality, have been implemented to carry out psychological assessments and interventions, using innovative human–machine interaction systems. In this context, the LEAP Motion sensing technology has raised interest, since it allows for more natural interactions with digital contents, via an optical tracking of hand and finger movements. Recent research has considered LEAP Motion features in virtual-reality-based systems, to meet specific needs of different clinical populations, varying in age and type of disorder. The present paper carried out a systematic mini-review of the available literature using Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) guidelines. The inclusion criteria were (i) publication date between 2013 and 2020, (ii) being an empirical study or project report, (iii) written in English or Italian languages, (iv) published in a scholarly peer-reviewed journal and/or conference proceedings, and (v) assessing LEAP Motion intervention for four specific psychological domains (i.e., autism spectrum disorder, attention-deficit/hyperactivity disorder, dementia, and mild cognitive impairment), objectively. Nineteen eligible empirical studies were included. Overall, results show that protocols for attention-deficit hyperactivity disorder and autism spectrum disorder can promote psychomotor and psychosocial rehabilitation in contexts that stimulate learning. Moreover, virtual reality and LEAP Motion seem promising for the assessment and screening of functional abilities in dementia and mild cognitive impairment. As evidence is, however, still limited, deeper investigations are needed to assess the full potential of the LEAP Motion technology, possibly extending its applications. This is relevant, considering the role that virtual reality could have in overcoming barriers to access assessment, therapies, and smart monitoring.

Associations between visual hallucinations and impaired visuo-spatial abilities in dementia with Lewy bodies.

Objectives: In dementia with Lewy bodies (DLB) recurrent visual hallucinations (VH) often coexist or occur consecutively to impaired visual perception. Since in-depth neuropsychological testing is time-consuming, and therefore, not routinely performed in clinical settings, we aimed to explore whether standard cognitive screening tests may be helpful to alert a clinician to the presence of VH in DLB by exploring association between visuo-spatial dysfunction and VH. Method: The clock drawing, cube, and pentagons copying items from Montreal Cognitive Assessment and Mini-Mental State Exam and nonmotor Hooper visual organization test (HVOT) have been scored in DLB patients with and without VH using traditional and extended scoring methods. Results: Forty-five of 69 (65%) DLB patients were VH-positive (VH+). VH+ patients performed worse on the clock drawing (8.8/16 vs. 11.9/16, p = .016) with a higher rate of misrepresentation of time (69% vs. 29%, p = .002) and numbers (53% vs. 25%, p = .024). Likewise, VH+ patients performed worse on the HVOT (13.3/30 vs. 15.7/30, p = .009) having more isolated (6.2/30 vs. 4.4/30, p = .012) types of responses compared to VH- patients. Both groups had similar copying ability (p > .05). The VH discriminative accuracy of the clock drawing was comparable to that of the more elaborate test of visual perception, the HVOT. Conclusions: In DLB impaired drawing and visual organization, but not copying ability is associated with the presence of VH. The simple clock drawing test can be helpful to alert a clinician to the possibility of VH in DLB. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Supplemental Material for Associations Between Visual Hallucinations and Impaired Visuo-Spatial Abilities in Dementia With Lewy Bodies

Supplemental Material for Associations Between Visual Hallucinations and Impaired Visuo-Spatial Abilities in Dementia With Lewy Bodies

Knowledge gains and intent to change practice patterns after the Leveraging Existing Abilities in Dementia (LEAD)™ Training Program

Few investigations have examined dementia training programs for rehabilitation professionals. To address this, the Leveraging Existing Abilities in Dementia (LEAD) program was developed and examined with a pilot study. LEAD addressed dementia knowledge; the Strength-Based Approach; strategies for communication, recognizing behaviors, and learning techniques; and documentation. Participants completed pre-program, post-program, and three-month follow-up questionnaires assessing confidence, practice patterns, and dementia knowledge. Confidence and use of treatment strategies increased through the three-month follow-up and dementia knowledge significantly increased following training. LEAD positively impacted rehabilitation professionals' knowledge, confidence, and use of evidence-based treatment strategies. Implications of LEAD and future research are discussed.

Neuropsychological predictors of health and safety abilities in dementia

The Independent Living Scales Health and Safety (ILS HS) scale is commonly used by neuropsychologists when evaluating older adults’ instrumental activities of daily living (IADLs). However, there is a minimal amount of research on its use in dementia populations and, specifically, its relationship to other neuropsychological measures. The present study investigated relationships between the ILS HS scale and measures of cognition and depression. The study utilized archival data from a sample (N = 142) of older adults (mean age = 77.85) diagnosed with dementia, who were evaluated at Saint Louis University Medical Center and administered the ILS HS scale as part of a larger clinical neuropsychological evaluation. Multiple regression analyses demonstrated that up to 37% of the variance in ILS HS performance was accounted for by demographic variables, premorbid intelligence, and cognitive functioning (e.g., global cognition, delayed verbal recall, and executive functioning), and regression models demonstrated medium to large effect sizes. Depression and self- or informant-reported IADLs were unrelated to the ILS HS scale. Results suggest that older adults’ ability to function in health and safety-related situations requires a range of cognitive abilities. Performance on these measures may help guide clinical decision making regarding independent living and treatment planning.

Addenbrooke's Cognitive Examination III: Psychometric Characteristics and Relations to Functional Ability in Dementia.

The Addenbrooke's Cognitive Examination (ACE) is a common cognitive screening test for dementia. Here, we examined the relationship between the most recent version (ACE-III) and its predecessor (ACE-R), determined ACE-III cutoff scores for the detection of dementia, and explored its relationship with functional ability. Study 1 included 199 dementia patients and 52 healthy controls who completed the ACE-III and ACE-R. ACE-III total and domain scores were regressed on their corresponding ACE-R values to obtain conversion formulae. Study 2 included 331 mixed dementia patients and 87 controls to establish the optimal ACE-III cutoff scores for the detection of dementia using receiver operator curve analysis. Study 3 included 194 dementia patients and their carers to investigate the relationship between ACE-III total score and functional ability. Study 1: ACE-III and ACE-R scores differed by ≤1 point overall, the magnitude varying according to dementia type. Study 2: a new lower bound cutoff ACE-III score of 84/100 to detect dementia was identified (compared with 82 for the ACE-R). The upper bound cutoff score of 88/100 was retained. Study 3: ACE-III scores were significantly related to functional ability on the Clinical Dementia Rating Scale across all dementia syndromes, except for semantic dementia. This study represents one of the largest and most clinically diverse investigations of the ACE-III. Our results demonstrate that the ACE-III is an acceptable alternative to the ACE-R. In addition, ACE-III performance has broader clinical implications in that it relates to carer reports of functional impairment in most common dementias. (JINS, 2018, 24, 854-863).

140Profiling Communication Ability in Dementia (P-CAD): Validation of a Functional Cognitive-Communication Assessment

140Profiling Communication Ability in Dementia (P-CAD): Validation of a Functional Cognitive-Communication Assessment

Consent for Intimacy Among Persons With Neurocognitive Impairment.

The right to bodily self-determination has a firm foothold in American jurisprudence and legislation. Since the early 20th century, courts have consistently upheld individuals' rights to govern their bodies, citing the constitutional right to privacy and importance of individual autonomy. After these decisions, the advance directive has become an essential way to express personal preferences after incapacity for decision-making, especially in end-of-life scenarios. Can sexual preferences survive cognitive incapacity as well? When individuals lose the capacity to voice sexual needs and preferences, there is no mechanism to protect sexual expression. Dementia's ability to render individuals legally incapable of consenting to sexual activity was the focus of the case of Iowa legislator Henry Rayhons. The state charged Mr. Rayhons with assault for alleged sexual interactions with his wife, who had Alzheimer's disease. The prosecution failed to prove its case. We propose a hypothetical sexual advance directive as a theoretical mechanism to assert sexual desire past incapacity, grounded in claims regarding the possible importance of sex for individuals with neurocognitive disorders. Forensic psychiatrists can play a unique role in the creation and implementation of such a tool.

Clinical Utility of Select Neuropsychological Assessment Battery Tests in Predicting Functional Abilities in Dementia.

Neuropsychological test performance can provide insight into functional abilities in patients with dementia, particularly in the absence of an informant. The relationship between neuropsychological measures and instrumental activities of daily living (IADLs) is unclear due to hetereogeneity in cognitive domains assessed and neuropsychological tests administered. Practical and ecologically valid performance-based measures of IADLs are also limited. The Neuropsychological Assessment Battery (NAB) is uniquely positioned to provide a dual-purpose assessment of cognitive and IADL function, as it includes Daily Living tests that simulate real-world functional tasks. We examined the utility of select NAB tests in predicting informant-reported IADLs in mild cognitive impairment and dementia. The sample of 327 participants included 128 normal controls, 97 individuals with mild cognitive impairment, and 102 individuals with Alzheimer's disease dementia from the Boston University Alzheimer's Disease Center research registry. Informants completed the Lawton Brody Instrumental Activities of Daily Living Scale, and study participants were administered selected NAB tests that were complementary to the existing protocol. ROC curves showed strongest prediction of IADL (AUC > 0.90) for memory measures (List Learning delayed recall and Daily Living Memory delayed recall) and Daily Living Driving Scenes. At a predetermined level of specificity (95%), List Learning delayed recall (71%) and Daily Living Memory delayed recall (88%) were the most sensitive. The Daily Living Memory and Driving Scenes tests strongly predicted IADL status, and the other Daily Living tests contributed unique variance. NAB memory measures and Daily Living Tests may have clinical utility in detecting informant-rated functional impairment in dementia.

Predicting the role of assistive technologies in the lives of people with dementia using objective care recipient factors.

BackgroundThe population of people with dementia is not homogeneous. People with dementia exhibit a wide range of needs, each characterized by diverse factors including age, sex, ethnicity, and place of residence. These needs and characterizing factors may influence the applicability, and ultimately the acceptance, of assistive technologies developed to support the independence of people with dementia. Accordingly, predicting the needs of users before developing the technologies may increase the applicability and acceptance of assistive technologies. Current methods of prediction rely on the difficult collection of subjective, potentially invasive information. We propose a method of prediction that uses objective, unobtrusive, easy to collect information to help inform the development of assistive technologies.MethodsWe develop a set of models that can predict the level of independence of people with dementia during 20 activities of daily living using simple, objective information. Using data collected from a Canadian survey conducted with caregivers of people with dementia, we create an ordered logistic regression model for each of the twenty daily tasks in the Bristol ADL scale.ResultsData collected from 430 Canadian caregivers of people with dementia were analyzed to reveal: most care recipients were mothers or husbands, married, living in private housing with their caregivers, English-speaking, Canadian born, clinically diagnosed with dementia 1 to 6 years prior to the study, and were dependent on their caregiver. Next, we developed models that use 13 factors to predict a person with dementia’s ability to complete the 20 Bristol activities of daily living independently. The 13 factors include caregiver relation, age, marital status, place of residence, language, housing type, proximity to caregiver, service use, informal primary caregiver, diagnosis of Alzheimer’s disease or dementia, time since diagnosis, and level of dependence on caregiver. The resulting models predicted the aggregate level of independence correctly for 88 of 100 total responses categories, marginally for nine, and incorrectly for three.ConclusionsObjective, easy to collect information can predict caregiver-reported level of task independence for a person with dementia. Knowledge of task independence can then inform the development of assistive technologies for people with dementia, improving their applicability and acceptance.

Musical tasks targeting preserved and impaired functions in two dementias.

Studies of musical abilities in dementia have for the most part been rather general assessments of abilities, for instance, assessing retention of music learned premorbidly. Here, we studied patients with dementias with contrasting cognitive profiles to explore specific aspects of music cognition under challenge. Patients suffered from Alzheimer's disease (AD), in which a primary impairment is in forming new declarative memories, or Lewy body disease (PD/LBD), a type of parkinsonism in which executive impairments are prominent. In the AD patients, we examined musical imagery. Behavioral and neural evidence confirms involvement of perceptual networks in imagery, and these are relatively spared in early stages of the illness. Thus, we expected patients to have relatively intact imagery in a mental pitch comparison task. For the LBD patients, we tested whether executive dysfunction would extend to music. We probed inhibitory skills by asking for a speeded pitch or timbre judgment when the irrelevant dimension was held constant or also changed. Preliminary results show that AD patients score similarly to controls in the imagery tasks, but PD/LBD patients are impaired relative to controls in suppressing some irrelevant musical dimensions, particularly when the required judgment varies from trial to trial.

Acculturation and Health Status Among Hispanic American Elders

Hispanic Americans are at risk for health-related problems. Disparities in diseases such as diabetes and obesity, poor access to health services, and lack of health insurance have placed Hispanic Americans at a disadvantage. Sociocultural factors such as acculturation and its relationship to health require further investigation. The primary purpose of this study was to identify the relationship between acculturation and health in Hispanic American elders and examine the interrelationships of acculturation, health status, age, gender, education, years in the United States, and income. This descriptive correlational study was a secondary analysis of data from a large study titled Culture Bias in Testing Expressive Ability in Dementia. A total sample of 132 community-dwelling Hispanic American elders was used. The Cross Cultural Measure of Acculturation was used to measure acculturation, and health status was measured using the SF-8® Health Survey. Correlation and multiple linear regressions were used to analyze the data. Findings from the study revealed that participants who were more acculturated to mainstream American culture reported their mental health to be better but not their physical health. This is an important contribution to advancing knowledge about cultural and health issues among Hispanic American elders, with implications for the clinical setting and for providing more culturally competent care.

Improving the Accuracy and Precision of Cognitive Testing in Mild Dementia

The CAMCOG, ADAS-cog, and MMSE, designed to grade global cognitive ability in dementia have inadequate precision and accuracy in distinguishing mild dementia from normal ageing. Adding neuropsychological tests to their scale might improve precision and accuracy in mild dementia. We, therefore, pooled neuropsychological test-batteries from two memory clinics (ns = 135 and 186) with CAMCOG data from a population study and 2 memory clinics (n = 829) and ADAS-cog data from 3 randomized controlled trials (n = 713) to estimate a common dimension of global cognitive ability using Rasch analysis. Item difficulties and individuals' global cognitive ability levels were estimated. Difficulties of 57 items (of 64) could be validly estimated. Neuropsychological tests were more difficult than the CAMCOG, ADAS-cog, and MMSE items. Most neuropsychological tests had difficulties in the ability range of normal ageing to mild dementia. Higher than average ability levels were more precisely measured when neuropsychological tests were added to the MMSE than when these were measured with the MMSE alone. Diagnostic accuracy in mild dementia was consistently better after adding neuropsychological tests to the MMSE. We conclude that extending dementia specific instruments with neuropsychological tests improves measurement precision and accuracy of cognitive impairment in mild dementia.