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Concurrent validity of critical flicker fusion in patients with primary degenerative dementia of the Alzheimer type
Author(s) -
Curran Stephen,
Wattis John P.,
Hindmarch Ian
Publication year - 1992
Publication title -
international journal of geriatric psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 129
eISSN - 1099-1166
pISSN - 0885-6230
DOI - 10.1002/gps.930070806
Subject(s) - flicker fusion threshold , dementia , concurrent validity , alzheimer's disease , psychomotor learning , degenerative disease , psychology , psychometrics , flicker , medicine , cognition , disease , psychiatry , audiology , central nervous system disease , clinical psychology , neuroscience , electrical engineering , internal consistency , engineering
The concurrent validity of critical flicker fusion threshold (CFFT) and flicker threshold measurement was examined in 23 female and three male patients with primary degenerative dementia of the Alzheimer type (PDDAT). Patients had a mean age of 81.7 ± 6.05 years (range 67–89). Diagnosis of PDDAT was based on the DSM‐III‐R classification. Both the CFFT and flicker thresholds were found to be highly and significantly correlated with standardized clinical assessment (Global Deterioration Scale), cognitive function (Abbreviated Mental Test) and psychomotor performance (Choice Reaction Time). The implications of these two measures for clinical trial research and the longitudinal assessment of patients with Alzheimer's disease are discussed.