Normative data for clustering and switching on verbal fluency tasks.

Area of Science:

• Neuropsychology
• Cognitive Psychology
• Linguistics

Background:

• Verbal fluency tasks are crucial for assessing executive functions.
• Establishing normative data is essential for accurate clinical interpretation.
• Previous research indicates demographic and test variables influence fluency performance.

Purpose of the Study:

• To provide normative data for clustering and switching on verbal fluency tasks.
• To correct raw scores for significant demographic and test variables.
• To assist clinicians and researchers in identifying and characterizing verbal fluency impairments.

Main Methods:

• Administered phonemic fluency (FAS or CFL) and semantic fluency (Animals, Supermarket) tests.
• Recruited 411 healthy adults aged 18-91.
• Applied statistical corrections for age, education, sex, and fluency form.

Main Results:

• Presented normative data for verbal fluency performance across a wide age range.
• Identified age, education, sex, and fluency form as significant variables affecting scores.
• Demonstrated the impact of these corrections on raw fluency scores.

Conclusions:

• The provided normative data are valuable for clinical and research settings.
• Corrected scores offer a more accurate representation of an individual's verbal fluency.
• This resource aids in the precise diagnosis of fluency deficits.