Use of the Arizona Battery for Communication Disorders of Dementia in the UK

Lawton's Instrumental Activities of Daily Living for Greek-Speaking Adults with Cognitive Impairment: A Psychometric Evaluation Study with Additional Receiver Operating Characteristic Curve Analysis

One of the components of a dementia diagnosis is the assessment of functional abilities. These abilities are measured via screeners, such as the Instrumental Activities of Daily Living (IADL) scale. The IADL scale is a valid tool that has been adapted in many languages. This study aimed to provide a cut-off point and validate the Greek version of the IADL scale in populations with cognitive impairment. IADL data were collected from 132 individuals: 24 PD patients, 24 Parkinson's disease dementia (PDD) patients, and 24 AD patients. The remaining 60 participants were cognitive healthy adults (CHAs). The CHA group and the PD group served as the cognitively unimpaired group (CUG), while the PDD and AD groups served as the cognitively impaired group (CIG). Additionally, the MMSE, the AMTS, the Clock Drawing Test CDT, the Arizona Battery for Communication Disorders of Dementia (ABCD), the NPI, and the GDS-15 were administered to the participants. Statistically significant differences in the IADL scores were exhibited between all subgroups. The IADL scale showed high internal consistency (Cronbach's alpha = 0.890). A threshold equal to 6.00 (AUC = 0.888, p < 0.001) was estimated between the CUG and the CIG. Significant positive correlations were observed between IADL and MMSE (r = 0.764, p < 0.001), IADL and AMTS (r = 0.724, p < 0.001), IADL and ABCD (r = 0.702, p < 0.001), and IADL and CDT (r = 0.627, p < 0.001) results. Given the obtained results, the IADL scale is a valid tool for clinical use with high reliability and sensitivity. Also, the IADL scale is a valuable instrument for screening functional abilities associated with cognitive impairment.

The Assessment of Language and Communication in Dementia: A Synthesis of Evidence

OBJECTIVE

Without the current option of a dementia cure, there is an existing need to focus on rehabilitation intervention. This includes interventions that address language and communication impairment (LCI), found to be present early in most types of dementia. Assessment of LCI can occur in many contexts (e.g., speech pathology, neuropsychology, occupational therapy) and is a vital initial step in providing adequate support to people living with dementia and their families. However, no previous research has compared the psychometric properties and utility of currently available and suitable tools for this purpose.

METHODS

Eighteen tools with the potential to assess language and communication in dementia were identified through a two-stage process, and a synthesis of evidence is provided.

RESULTS

Three tools satisfied all selection criteria: the Arizona Battery for Communication Disorders of Dementia, the Sydney Language Battery, and the Addenbrooke's Cognitive Examination III. Main limitations of the 18 tools reviewed concern a lack of standardization, normative data, and criterion validity, as well as poor evidence of reliability of tools originally developed for non-neurodegenerative LCI (e.g., aphasia in the context of cerebrovascular accidents). Furthermore, no tool considers the perspectives of people with dementia regarding the impact of LCI on their daily lives.

CONCLUSION

Further research is needed to improve reliability and validity of currently available tools for the linguistic assessment of people living with dementia. Importantly, a tool to assess early identification of language and communication difficulties and associated needs among people with dementia is warranted to facilitate timely management and support.

Processing of wh-questions in a case of posterior cortical atrophy

Posterior cortical atrophy (PCA) is a type of dementia that is characterized by visuo-spatial and memory deficits, dyslexia and dysgraphia, relatively early onset and preserved insight. Language deficits have been reported in some cases of PCA. Using an off-line grammaticality judgement task, processing of wh-questions is investigated in a case of PCA. Other aspects of auditory language are also reported. It is shown that processing of wh-questions is influenced by syntactic structure, a novel finding in this condition. The results are discussed with reference to accounts of wh-questions in aphasia. An uneven profile of other language abilities is reported with deficits in digit span (forward, backward), story retelling ability, comparative questions but intact abilities in following commands, repetition, concept definition, generative naming and discourse comprehension.

Development of a screening instrument for language in older people (Barnes Language Assessment)

Language changes are associated with several types of age-related degenerative processes and are known to be particularly stressful for carers. Managing language and communication difficulties in older people has been shown to be an important aspect of dementia care. A test such as the one described here, might be a useful tool for health professionals planning care for older people with possible diagnoses of dementia. The information gained could be used as part of multi-disciplinary team assessment. This paper describes the development of a clinically viable assessment tool for the assessment of language and associated cognitive skills in the older population. Data on 43 normal older people were used to establish preliminary means and lower normal limits, as a guide to distinguishing performance associated with normal age-related change from performance associated with pathology. In the next phase data was collected from 43 older people with possible dementia who were attending clinics and hospital departments. The results suggest that the Barnes Language Assessment can profile language skills and difficulties and may be a useful diagnostic tool to contribute to language assessment of older people. Indications for further research are discussed.