Spanish Multicenter Normative Studies (NEURONORMA Project): norms for verbal fluency tests.

Area of Science:

• Neuroscience
• Psychology
• Linguistics

Background:

• Verbal fluency tests are crucial for assessing language and executive functions in clinical settings.
• Existing norms may not adequately represent diverse elderly populations, necessitating updated, adjusted data.

Purpose of the Study:

• To establish age- and education-adjusted norms for various verbal fluency tasks in cognitively normal, community-dwelling elderly Spanish individuals.
• To facilitate accurate clinical interpretation and diagnostic accuracy of verbal fluency assessments in this demographic.

Main Methods:

• Utilized data from 346 cognitively normal Spanish participants aged 50-94 years.
• Developed norms for semantic fluency (animals, food, tools), formal lexical fluency (P, M, R), and excluded letter fluency (A, E, S).
• Applied regression-based adjustments to convert raw scores into age- and education-adjusted scaled scores.

Main Results:

• Provided comprehensive tables for converting raw verbal fluency scores to age-adjusted and subsequently education-adjusted scaled scores.
• The established norms are tailored for elderly Spanish populations, accounting for significant demographic variables.

Conclusions:

• The developed norms offer clinically valuable data for evaluating elderly Spanish individuals' language and executive functions.
• These norms are expected to improve the interpretation of verbal fluency tasks, leading to enhanced diagnostic accuracy and potential for international comparisons.