Sample selection bias may have led the study to overestimate language outcomes for adolescents with long-term CI use¶
Claim · All claims
Evidence · 1 study · associationalr2·q1
Currency · newest study 2011 · not yet checked against its sources · not reviewed by a person
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.
q1 i? The authors state that volunteer selection at both recruitment waves may have inflated observed language outcomes relative to the full CI population. → Geers Ann E. 2011
Evidence¶
Geers Ann E. 2011¶
Geers Ann E., Sedey Allison L. (2011). Language and Verbal Reasoning Skills in Adolescents with 10 or More Years of Cochlear Implant Experience. Ear and Hearing. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3157037/
q1 · i? · associational · r2
Authors' stated limitation in the Discussion: participating families were highly motivated early adopters with English-only homes and above-average parental education, and the 112 follow-up participants outperformed the 72 non-returners on some CI-E outcome measures.
"These sample selection factors may have resulted in our overestimating language outcomes to be expected for adolescents with long-term use of CIs."
Discussion¶
Related Claims¶
- Two-thirds to three-quarters of adolescent CI users score within the normal range on vocabulary and language content measures — related
- 71% of adolescent long-term CI users obtain verbal IQs within or above one standard deviation of hearing age-mates — related
- The dashboard's cohort view restricts results to students who consistently tested across selected terms, and those outcomes may be positively biased — related
- Verbal reasoning subtest scores of long-term CI users increased from elementary grades to high school beyond expected age-related growth — related
- Adolescent CI users perform weakest on connected discourse comprehension and abstract verbal reasoning subtests — related
- The study's invariance findings may be biased by excluding students who missed a test and by sample heterogeneity — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
ci-study-selection-bias-overestimate |
title |
Sample selection bias may have led the study to overestimate language outcomes for adolescents with long-term CI use |
description |
Sample selection bias may have led the study to overestimate language outcomes for adolescents with long-term CI use |
status |
review |
evidence_strength |
weak |
newest_evidence |
2011 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — geers-ann-e-2011 |
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