Category fluency declines with age and remains significantly impaired after controlling for processing speed and IQ¶
Claim · All claims
Evidence · 1 study · associationalr2·q3
Currency · newest study 2011 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2016: baselines and conditions change
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
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q3 i? Semantic category fluency shows significant impairment as a function of age, and this decline remains significant even after eliminating the effect of decline in processing speed. → Safa A. Elgamal 2011
Evidence¶
Safa A. Elgamal 2011¶
Safa A. Elgamal, MBBCh, PhD, Eric A. Roy, PhD, Michael T. Sharratt, PhD. (2011). Age and Verbal Fluency: The Mediating Effect of Speed of Processing. Canadian Geriatrics Journal, Volume 14, Issue 3. https://doi.org/10.5770/cgj.v14i3.17
q3 · i? · associational · r2
Cross-sectional ANOVA and ANCOVA results for category fluency (animal naming in 60 seconds) across the three age groups. The discussion reports the decline "starts after the age of 35 years and remains significant even after eliminating the effect of decline in processing speed," with the ANCOVA between-group effect at p = .01 (Table 4).
"on semantic category fluency, our results showed that there is significant impairment in performance as a function of age, which confirms the results of prior studies."
Discussion¶
Related Claims¶
- Age correlates negatively with processing speed and category fluency and positively with IQ, but not with letter fluency — related
- Young adults outperform older adults on category fluency and processing speed, while older adults outperform young adults on premorbid IQ (NART) — a broader claim this one bears on
- Curve estimation shows linear decline in processing speed after age 30, quadratic trajectories for category fluency and IQ, and no age change in letter fluency — related
- Processing speed has a significant effect on both letter and category fluency in older adults, while IQ does not — related
- Decline in letter fluency beyond normal age expectations warrants further evaluation for neurological or mental disorder — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
category-fluency-decline-persists-after-speed-control |
title |
Category fluency declines with age and remains significantly impaired after controlling for processing speed and IQ |
description |
Category fluency declines with age and remains significantly impaired after controlling for processing speed and IQ |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2011 |
recheck_by |
2016 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — safa-a-elgamal-2011 |
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