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BICYCLE DRAWING TEST –  VALIDATION STUDY FOR DEMENTIA

Authors: E. Bolceková1,2,3, K. Čechová1,3, H. Marková4, S. Johanidesová5, H. Štěpánková3, M. Kopeček3

Authors - sphere of activity: 1Katedra psychologie, FF UK v Praze, 2Neurologická klinika a Centrum klinických neurověd 1. LF UK a VFN v Praze, 3Národní ústav duševního zdraví, Klecany, 4Kognitivní centrum, Neurologická klinika 2. LF UK a FN v Motole, Praha, 5Laboratoř evokovaných potenciálů, neurologické oddělení, Thomayerova nemocnice, Praha

Article: Cesk Slov Neurol N 2016; 79/112(4): 416-423
Category: Original Paper
Number of articles displayed: 397x

Specialization: Neurology Neurosurgery Paediatric neurology

Summary

Aims:
The Bicycle Drawing Test (BDT) is used in neuropsychological assessment to evaluate visuospatial and executive functions. Administration and scoring are short and simple. The aim of this project was to examine psychometric properties of the BDT (reliability, validity) and the effect of demographic characteristics and to present results of healthy older adults. A secondary aim was to compare two different scoring systems.

Methods:
We evaluated 111 drawings of cognitively healthy adults aged over 60 (age M = 74.4 years, SD = 7.8; education M = 13.5 years, SD = 3.6) and 57 drawings of patients with cognitive deficit (age M = 75.6 years, SD = 7.3; education M = 13.8 years, SD = 3.3). The group with cognitive deficit included patients with mild cognitive impairment, dementia due to Alzheimer’s disease, and other dementias. All subjects completed a detailed neuropsychological battery. Drawings were scored according to Lezak’s and Greenberg’s systems.

Results:
We present values for inter-rater reliability, item-total correlation and internal consistency. Scores were not influenced by age or education but differed by gender. Convergent and divergent validity analysis showed correlation with measures of visuospatial and executive functions and with global cognitive functioning, and lack of correlation with memory or language measures. We found satisfactory discriminative power of BDT for detection of dementia but not for MCI.

Conclusions:
Psychometric properties of BDT substantiate its use in clinical practice for evaluation of visuospatial functions and global cognition level. Presented values for transformation of raw scores into standard scores allow clinicians to work with quantitative rating of results.

Key words:
Bicycle Drawing Test – visuospatial function – executive function – reliability – validity

The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study.

The Editorial Board declares that the manuscript met the ICMJE “uniform requirements” for biomedical papers.

 

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