Verbal Fluency Tests – Czech Normative Study for Older Persons

Česká verzia

Authors: T. Nikolai ¹; H. Štěpánková ²; J. Michalec ^2,3; O. Bezdíček ^1,2; K. Horáková ²; H. Marková ⁴; E. Růžička ¹; M. Kopeček ²
Authors place of work: Neurologická klinika a Centrum klinických neurověd 1. LF UK a VFN v Praze ¹; Národní ústav duševního zdraví, Klecany ²; Psychiatrická klinika 1. LF UK a VFN v Praze ³; Mezinárodní centrum klinického výzkumu, LF MU a FN u sv. Anny v Brně ⁴
Published in the journal: Cesk Slov Neurol N 2015; 78/111(3): 292-299
Category: Original Paper
doi: https://doi.org/10.14735/amcsnn2015292

Summary

Aim:
The aim of the study was to report normative data on letter (LF; letters K, P, S) and semantic fluency (SF; animals and vegetables).

Introduction:
Verbal fluency (VF) is one of the most frequently used neuropsychological methods for the assessment of cognitive performance in clinical and experimental neuropsychology. However, representative normative data for the Czech population of older and very old adults are so far lacking.

Methods:
We administered VF as part of neuropsychological battery to 540 (292 women, 248 men) healthy older adults (60– 96 years of age). In LF, the letters K, P, S and their total score were used as analogous to the original Controlled Oral Word Association Test (COWAT/ FAS). In SF, we evaluated performance in two categories – animals and vegetables.

Results:
Age was significantly (p < 0.001) related to a sum of K + P + S (r = – 0.236) as well as animals (r = – 0.359) and vegetables (r = – 0.264). However, the association was moderate. Education was also moderately related (p < 0.001) to the sum of K + P + S (r = 0.297) and animals (r = 0.357). However, we did not find a significant relationship between age and vegetables (r = 0.028; p = 0.523). Vegetables were also the only measure that showed highly significant sex differences (p < 0.001). We present normative Czech data for 60– 75, 70– 85 and 80– 96 age groups.

Conclusion:
The results of our study confirm a significant moderate influence of age and education (with the exception of vegetables for the latter) on all VF measures. There were highly significant sex differences in the vegetable category.

Key words:
verbal fluency – normative data – neuropsychological assessment

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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