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Older adults with early forms of neurodegenerative disease are at risk for functional disability, which is often defined by the loss of independence in instrumental activities of daily living (IADLs). The current study investigated the influence of mild changes in everyday functional abilities (referred to as functional limitations) on risk for development of incident functional disability. A total of 407 participants, who were considered cognitively normal or diagnosed with mild cognitive impairment (MCI) at baseline, were followed longitudinally over an average 4.1 years (range=0.8–9.2 years). Informant-based ratings from the Everyday Cognition (ECog; Farias et al., 2008) and the Instrumental Activities of Daily Living (Lawton & Brody, 1969) scales assessed the degree of functional limitations and incident IADL disability, respectively. Cox proportional hazards models revealed that more severe functional limitations (as measured by the Total ECog score) at baseline were associated with approximately a four-fold increased risk of developing IADL disability a few years later. Among the ECog domains, functional limitations in Everyday Planning, Everyday Memory, and Everyday Visuospatial domains were associated with the greatest risk of incident functional disability. These results remained robust even after controlling for participants’ neuropsychological functioning on tests of executive functions and episodic memory. Current findings indicate that early functional limitations have prognostic value in identifying older adults at risk for developing functional disability. Findings highlight the importance of developing interventions to support everyday abilities related to memory, executive function, and visuospatial skills in an effort to delay loss of independence in IADLs. (JINS, 2015, 21, 688–698)

To evaluate the psychometric characteristics of the Cognitive Difficulties Scale (CDS), a 39-item Likert-type self-report instrument that requires a fifth grade reading level. The CDS is a popular instrument that has been shown to predict cognitive decline in older persons. Participants were 512 consecutive outpatient referrals (71% women, mean age 60.6, and education 14.6 years) for a neuropsychological examination in a memory disorders clinic as part of a broader neurodiagnostic workup for cognitive decline. A principal components analysis was followed by a varimax rotation (Kaiser). Factor scores were investigated in relation to multiple internal and external criteria including demographics, Cronbach's alpha, Digit Span, and Wechsler Memory Scale-IV Logical Memory (LM) and Visual Reproduction (VR), and Minnesota Multiphasic Personality Inventory (MMPI)-2 measures of depression, anxiety, somatic preoccupations, and thought disturbance. Six dimensions of cognitive complaint emerged accounting for 64% of the variance: attention/concentration, praxis, prospective memory, speech problems, memory for people's names, and temporal orientation. The factors showed good internal consistency (alphas > .850). Correlations with Digit Span, LM, and VR were all nonsignificant. CDS scores were associated with MMPI-2 measures of anxiety, depression, somatic preoccupation, and thought disturbance. Percentiles and T-scores were derived for raw scores on the CDS and its six component subscales. The CDS is a multidimensional measure of subjective cognitive complaints that provides clinicians with a psychometrically sound basis for deriving a profile with six subscale scores. The test has clinical utility and is a potentially useful tool in research involving age-related cognitive changes and meta-cognition.

Background Stroke significantly impacts an individual’s ability to perform instrumental activities of daily living (IADLs). Intraindividual variability (IIV) is characterized by heightened fluctuations across multiple attempts at a task. IIV is a behavioral indicator of central nervous system instability that may contribute directly to compromised capacity to perform IADLs following stroke. This study aimed to investigate the relationship between IIV and IADL performance in stroke survivors and determine whether executive control and/or motor capacity serve as mediating pathways. Methods In this cross-sectional observational study, 84 stroke survivors and 35 healthy older adults participated. We derived latent factor scores for IIV from reaction time and goal directed tasks, IADL performance from the Observed Task of Daily Living and Functional Activities Questionnaire, executive control from tests of divided attention, selective attention, cognitive flexibility, and processing speed, and motor capacity from grip and ankle strength. We examined the association between IIV and IADL performance and conducted a parallel mediation analysis to determine whether executive control and motor capacity mediated this relationship. Results Higher IIV was associated with compromised IADL performance. Mediation analyses showed that the relationship between IIV and IADL performance was significantly mediated by executive control but not motor capacity while controlling for the covariate of age. Conclusions Behavioral variability after stroke impacts everyday function primarily through a cognitive pathway. These findings highlight executive control as a key therapeutic target in stroke rehabilitation to mitigate the functional consequences of neural instability on instrumental activities of daily living.

Objectives: Careful characterization of how functional decline co-evolves with cognitive decline in older adults has yet to be well described. Most models of neurodegenerative disease postulate that cognitive decline predates and potentially leads to declines in everyday functional abilities; however, there is mounting evidence that subtle decline in instrumental activities of daily living (IADLs) may be detectable in older individuals who are still cognitively normal. Methods: The present study examines how the relationship between change in cognition and change in IADLs are best characterized among older adults who participated in the ACTIVE trial. Neuropsychological and IADL data were analyzed for 2802 older adults who were cognitively normal at study baseline and followed for up to 10 years. Results: Findings demonstrate that subtle, self-perceived difficulties in performing IADLs preceded and predicted subsequent declines on cognitive tests of memory, reasoning, and speed of processing. Conclusions: Findings are consistent with a growing body of literature suggesting that subjective changes in everyday abilities can be associated with more precipitous decline on objective cognitive measures and the development of mild cognitive impairment and dementia. (JINS, 2018, 24, 104–112)

Background It is important to detect children with Early Symptomatic Syndromes Eliciting Neurodevelopmental Clinical Examinations (ESSENCE) in order to implement early intervention and support for the child and family. Standardized instruments for assessment in different contexts of behaviour problems, engagement and psychosocial health obtain an objective picture of the preschool child's mental health. Aim To explore and compare parents', preschool teachers' and child health care psychologists' assessment of behaviour, everyday function, engagement, social interaction and psychosocial health in children with ESSENCE symptoms. Method Parents of 152 children (114 boys and 38 girls, 4.5 ± 1 years) with ESSENCE symptoms, 155 preschool teachers and 8 child psychologists participated. Parents and preschool teachers assessed externalizing and internalizing behavioural problems using the Strengths and Difficulties Questionnaire (SDQ), including the SDQ supplement for assessing the impact of behavioral problems on daily function. Preschool teachers also assessed engagement and social interaction using the Children's Engagement Questionnaire (CEQ), and the child psychologists assessed psychosocial health with the Child Psychosocial Health Assessment (LillaLAPS) and template in conversations with parents of children with neurodevelopmental problems. Results Parents', preschool teachers' and child psychologists' assessment of the child's ESSENCE symptoms overall agreed. Both parents and preschool teachers see a strength in the child's social abilities. Differences in mean values show that parents assess more conduct, emotional symptoms and problems in daily life and more social skills, compared to the preschool teachers rating more peer problems. Conclusion It is important to consider different contexts to identify the child's need for support in everyday life. Expanded use of validated screening instruments in clinical practice would promote detection of children not already identified as exhibiting neurodevelopmental problems.

Alzheimer's disease and Alzheimer's disease related dementias (AD/ADRD) have a significant impact on an individual's functional cognitive abilities, highlighting the need to prioritize measures of function in evaluating minimally clinically important difference (MCID) thresholds in AD/ADRD research. Input directly from individuals living with AD/ADRD on measures of function are lacking in MCID discussions, including what it means to live with AD/ADRD and what type and degree of improvements are most meaningful across the disease continuum. Most measures for assessing function in AD/ADRD trials are largely focused on basic and instrumental activities of daily living (BADL, IADL), which lack aspects of everyday function that matter most to individuals living with AD/ADRD. Expanding outcome evaluation to other dimensions of everyday function and diversifying measurement approaches is essential for optimizing inclusion of personally meaningful aspects of everyday function prioritized by individuals living with AD/ADRD and improving detection of potentially more sensitive changes in functioning. This perspective outlines four directions to expand and integrate what matters most to individuals living with AD/ADRD into trial outcome evaluation, including (1) consideration of how what matters most to individuals living with AD/ADRD may change across the disease continuum from mild to advanced dementia, (2) identification and evaluation of goals around strengths‐based domains such as social participation rather than solely emphasizing deficits and losses, (3) utilization of goal‐attainment scaling to more specifically match individually‐specific functional goals, and (4) strengthening the inclusion and use of self‐report and performance‐based measures of function and triangulating these measures with informant‐report measures. Highlights Alzheimer's disease and Alzheimer's disease related dementias (AD/ADRD) have a significant impact on an individual’ functional cognitive abilities, of which changes in these abilities are measured through detection of minimally clinically important difference (MCID) thresholds to determine the effectiveness of AD/ADRD clinical trials. Widely used measures for assessing MCID thresholds in AD/ADRD trials focus on basic and instrumental activities of daily living, presenting opportunities to expand measurement of MCID to account for other dimensions of everyday function that are prioritized by individuals living with AD/ADRD. To expand outcome evaluation and improve integration of aspects of functioning that matter most to people living with AD/ADRD, we identify opportunities to incorporate more diverse strategies via goal‐attainment scaling, self‐report, and performance‐based measures as appropriate. We also highlight the importance of incorporating strengths‐based domains such as social participation, moving beyond deficit‐focused assessment of functioning.

To measure caregivers' and clinicians' perception of false memories in the lives of patients with memory loss due to Alzheimer's disease (AD) and mild cognitive impairment (MCI) using a novel false memories questionnaire. Our hypotheses were that false memories are occurring as often as forgetting according to clinicians and family members. This prospective, questionnaire-based study consisting of 20 false memory questions paired with 20 forgetting questions had two forms: one for clinicians and the other for family members of older subjects. In total, 226 clinicians and 150 family members of 49 patients with AD, 44 patients with MCI, and 57 healthy older controls (OCs) completed the questionnaire. False memories occurred nearly as often as forgetting according to clinicians and family members of patients with MCI and AD. Family members of OCs and patients with MCI reported fewer false memories compared to those of the AD group. As Mini-Mental State Examination scores decreased, the mean score increased for both forgetting and false memories. Among clinicians, correlations were observed between the dementia severity of patients seen with both forgetting and false memories questionnaire scores as well as with the impact of forgetting and false memories on daily life. Patients with AD experience false memories almost as frequently as they do forgetting. Given how common false memories are in AD patients, additional work is needed to understand the clinical implications of these false memories on patients' daily lives. The novel false memories questionnaire developed may be a valuable tool.

Mild cognitive impairment (MCI) refers to the intermediate period between the typical cognitive decline of normal aging and more severe decline associated with dementia, and it is associated with greater risk for progression to dementia. Research has suggested that functional abilities are compromised in MCI, but the degree of impairment and underlying mechanisms remain poorly understood. The development of sensitive measures to assess subtle functional decline poses a major challenge for characterizing functional limitations in MCI. Eye-tracking methodology has been used to describe visual processes in everyday, naturalistic action among healthy older adults as well as several case studies of severely impaired individuals, and it has successfully differentiated healthy older adults from those with MCI on specific visual tasks. These studies highlight the promise of eye-tracking technology as a method to characterize subtle functional decline in MCI. However, to date no studies have examined visual behaviors during completion of naturalistic tasks in MCI. This review describes the current understanding of functional ability in MCI, summarizes findings of eye-tracking studies in healthy individuals, severe impairment, and MCI, and presents future research directions to aid with early identification and prevention of functional decline in disorders of aging.

Conventional methods of functional assessment include subjective self- or informant report, which may be biased by personal characteristics, cognitive abilities, and lack of standardization (eg, influence of idiosyncratic task demands). Traditional performance-based assessments offer some advantages over self- or informant reports but are time-consuming to administer and score. This study aims to evaluate the validity and reliability of the Virtual Kitchen Challenge-Version 2 (VKC-2), an objective, standardized, and highly efficient alternative to current functional assessments for older adults across the spectrum of cognitive aging, from preclinical to mild dementia. A total of 236 community-dwelling, diverse older adults completed a comprehensive neuropsychological evaluation to classify cognitive status as healthy, mild cognitive impairment, or mild dementia, after adjustment for demographic variables (age, education, sex, and estimated IQ). Participants completed 2 everyday tasks (breakfast and lunch) in a virtual kitchen (VKC-2) using a touchscreen interface to select objects and sequence steps. Automated scoring reflected completion time and performance efficiency (eg, number of screen interactions, percentage of time spent off-screen, interactions with distractor objects). Participants also completed the VKC-2 tasks using real objects (Real Kitchen). All participants and informants for 219 participants completed questionnaires regarding everyday function. A subsample of participants (n=143) performed the VKC-2 again in a second session, 4-6 weeks after the baseline, for retest analyses. Analyses evaluated construct and convergent validity, as well as retest and internal reliability, of VKC-2 automated scores. A principal component analysis showed that the primary VKC-2 automated scores captured a single dimension and could be combined into a composite score reflecting task efficiency. Construct validity was supported by analyses of covariance results showing that participants with healthy cognition obtained significantly better VKC-2 scores than participants with cognitive impairment (all Ps<.001), even after controlling for demographics and general computer visuomotor dexterity. Convergent validity was supported by significant correlations between VKC-2 scores and performance on the Real Kitchen (r=-0.58 to 0.64, Ps<.001), conventional cognitive test scores (r=-0.50 to -0.22, Ps<.001), and self- and informant report questionnaires evaluating everyday function (r=0.25 to 0.43, Ps<.001). Intraclass correlation coefficients (ICCs) indicated moderate to excellent retest reliability (ICC=0.70-0.90) for VKC-2 scores after 4-6 weeks. Reliability improved in analyses including only participants who reported no change in cognitive status between time 1 and time 2 (n=123). Spearman-Brown correlations showed acceptable to good internal consistency between the VKC-2 tasks (breakfast and lunch) for all scores (0.77-0.84), supporting the use of total scores. The VKC-2 is an efficient, valid, and sensitive measure of everyday function for diverse older adults and holds promise to improve the status quo of functional assessment in aging, particularly when informants are unavailable or unreliable.

Impaired ability to conduct daily activities is a diagnostic criterion for dementia and a determinant of healthcare services utilization and caregiver burden. What predicts decline in instrumental activities of daily living (IADLs) is not well understood. This study examined measures of episodic memory, executive function, and MRI brain volumes in relation to baseline IADLs and as predictors of rate of IADL change. Participants were 124 elderly persons with cognitive function between normal and moderate dementia both with and without significant small vessel cerebrovascular disease. Random effects modeling showed that baseline memory and executive function (EXEC) were associated with baseline IADL scores, but only EXEC was independently associated with rate of change in IADLs. Whereas hippocampal and cortical gray matter volumes were significantly associated with baseline IADL scores, only hippocampal volume was associated with IADL change. In a model including cognitive and neuroimaging predictors, only EXEC independently predicted rate of decline in IADL scores. These findings indicate that greater executive dysfunction at initial assessment is associated with more rapid decline in IADLs. Perhaps executive function is particularly important with respect to maintaining IADLs. Alternatively, executive dysfunction may be a sentinel event indicating widespread cortical involvement and poor prognosis. (JINS, 2007, 13, 747–757.)