Age correlates negatively with processing speed and category fluency and positively with IQ, but not with letter fluency¶
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.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q3 i? Age as a continuous variable was negatively correlated with processing speed and category fluency and positively correlated with IQ, but was not correlated with letter fluency. → 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
Pearson's correlation analysis (pairwise deletion) across the full sample of 130, reported in Table 1. The quoted sentence confirms the correlational pattern matched the ANOVA group comparisons; Table 1 shows age correlations of –0.63 with the processing speed composite and –0.3 with category fluency, marked significant at p < .05.
"Age as a continuous variable was negatively correlated with processing speed and category fluency and positively correlated with IQ, but not correlated with letter fluency (Table 1), confirming the results of the ANOVA."
Discussion¶
Related Claims¶
- 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 — a narrower finding that bears on this claim
- Letter fluency shows no age-group difference in ANOVA, but older adults outperform young adults once processing speed and IQ are controlled — related
- Category fluency declines with age and remains significantly impaired after controlling for processing speed and IQ — related
- Young adults outperform older adults on category fluency and processing speed, while older adults outperform young adults on premorbid IQ (NART) — 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 |
age-correlations-cognitive-variables |
title |
Age correlates negatively with processing speed and category fluency and positively with IQ, but not with letter fluency |
description |
Age correlates negatively with processing speed and category fluency and positively with IQ, but not with letter fluency |
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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