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P2‐197: Dépistage cognitif de québec (DCQ): A novel cognitive screening test for atypical dementias
Author(s) -
Bergeron David,
Fortin Marie-Pierre,
Houde Michèle,
Poulin Stéphane,
Roy Martin,
Verret Louis,
Bouchard Remi W.,
Laforce Robert
Publication year - 2015
Publication title -
alzheimer's and dementia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.713
H-Index - 118
eISSN - 1552-5279
pISSN - 1552-5260
DOI - 10.1016/j.jalz.2015.06.736
Subject(s) - dementia , concordance , cognition , frontotemporal dementia , memory clinic , clinical psychology , psychiatry , subtyping , cronbach's alpha , executive functions , psychology , medicine , nosology , logical address , disease , psychometrics , cognitive impairment , pathology , computer science , programming language , physical address , overlay
Cognitive assessments often require the administrator to have internalized a complex administration and scoring manual and to be able to apply this invivo during testing sessions where demands on the administrator can be high. Scoring assessments requires knowledge of psychometric theory and reliable mental arithmetic skills. This project developed and evaluated an iPad based tool to support the use of the Addenbrooke’s Cognitive Examination III, a cognitive assessment tool commonly used in memory clinics in the UK. Methods: Study 1: 87 ACE-III administrations from 4 NHS clinics in the SouthWest of the UKwere evaluated for scoring and reporting errors. Study 2: ACEmobile for iPad was developed across 2 years to support clinicians in the areas identified as challenging reliability and validity. The efficacy of this was evaluated using a usability methodology, where participants were recorded administering an ACE-III in role-play format (with a pre-established ‘true score’). Deviation from expected true score is interpreted as a failure to capture true measurement. Training post-doc clinical / research staff (N1⁄422) were assessed for administration accuracy, response interpretation, scoring accuracy and mental arithmetic when using ACE-III (N1⁄410) and ACEmobile (N1⁄412). Results: Study 1: 64% of the NHS administrations of ACE-III were shown to bemis-scored, with error ranges -11 to 10. Mental arithmetic errors were observed in 23% of the assessments, with error ranges -10 to 10. Study 2: Only 10% of ACE-III administrations matched true score after training (N1⁄410) with 42% of ACEmobile administrations matching true score (N1⁄412), with no training. Conclusions: Administration and scoring errors observed by clinicians using ACE-III were shown to reduce significantly with administration support from ACEmobile. The study highlight other areas where administration was prone to error so further developments were made to ACEmobile to address these. Recommendations are made for the use of ACEmobile in standard clinical assessment procedures and research trials.