Working memory capacity is significantly smaller in lower-SES than higher-SES adolescents¶
Claim · All claims
Evidence · 1 study · associationalr1·q3
Currency · newest study 2015 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2020: 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? Planned post-hoc analyses showed working memory capacity was significantly smaller in the lower-SES group (Median = 3.50) than the higher-SES group (Median = 5.25) on the count span task. → Leonard JA 2015
Evidence¶
Leonard JA 2015¶
Leonard JA, Mackey AP, Finn AS and Gabrieli JDE (2015) Differential effects of socioeconomic status on working and procedural memory systems. Front. Hum. Neurosci. 9:554. https://doi.org/10.3389/fnhum.2015.00554
q3 · i? · associational · r1
Kruskal–Wallis H-test on count span scores (data not normally distributed, Shapiro–Wilk p < 0.05) from 23 lower-SES and 34 higher-SES adolescents. "Working memory capacity was significantly smaller in the lower-SES" group, X2(1) = 8.72, p = 0.003; no effect size was printed.
"Planned post-hoc analyses showed that working memory capacity was significantly smaller in the lower-SES th an the higher-SES group [lower-SES: Median = 3.50; higher-SES: Median = 5.25; X2(1) = 8.72, p = 0.003"
Discussion¶
Related Claims¶
- Lower-SES adolescents have smaller hippocampal and DLPFC volumes but do not differ in caudate volumes — related
- Cool executive function measures show ascending age-related growth across adolescence, with a growth spurt around age 14–15 — related
- Adolescents with ADHD show poorer accuracy than non-ADHD peers on all conditions of a visual short-term memory task, with the largest drop on trials requiring WM updating — related
- Blocked-format span declines after age 20 but mixed-format span does not, implicating proactive interference in aging declines — related
- Same-construct memory task correlations exceed different-construct correlations — related
- Lower-SES and higher-SES adolescents did not significantly differ on probabilistic classification learning — related
- Exploratory ROI volume–behavior correlations within SES groups did not survive FDR correction — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
lower-ses-smaller-working-memory-capacity |
title |
Working memory capacity is significantly smaller in lower-SES than higher-SES adolescents |
description |
Working memory capacity is significantly smaller in lower-SES than higher-SES adolescents |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2015 |
recheck_by |
2020 |
generated |
by process:wiki-ingest on 2026-10-17 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — leonard-ja-2015 |
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