Lower-SES adolescents have smaller hippocampal and DLPFC volumes but do not differ in caudate volumes¶

Claim · All claims
Evidence · 2 studies · 2 associational r2 · q3 · i2 medium
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¶

q3 i2 A repeated measures ANOVA on brain volumes showed a main effect of SES (η2 = 0.42) and an SES by region interaction (η2 = 0.12), indicating SES affected some regions more than others. → Leonard JA 2015 q3 i? Neither right nor left caudate volumes differed significantly between SES groups, while both hippocampi and both DLPFC volumes were significantly smaller in the lower-SES group. → Leonard JA 2015 (2)

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 · i2 · associational · r2

Repeated measures ANOVA on Z-scored volumes of hippocampus, caudate, and DLPFC from 58 adolescents, controlling for sex. The "SES by region interaction" (F(1, 335) = 7.14, p < 0.001, η2 = 0.12) shows SES affected regions differentially.

"A repeated measure s ANOV A on volume showed a main effect of SES [ F(1, 335) = 50.09, p < 0.001, η 2 = 0.42], region [ F(1, 335) = 3.77, p = 0.02, η 2 = 0.06], and an SES by region interaction [ F(1, 335) = 7.14, p < 0.001, η 2 = 0.12]"

Leonard JA 2015 (2)¶

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 · r2

Post-hoc t-tests on each region by SES group found "Neither right nor left caudate volumes differed significantly between the SES groups" (right p = 0.77, left p = 0.57), while the article reports hippocampal and DLPFC volumes were significantly smaller in the lower-SES group (e.g., right DLPFC p < 0.001).

"Neither right nor left caudate volumes differed significantly between the SES groups [Right: b = 42.47, t(55) = 0.30, p = 0.77, r2 = 0.01, 95% CI [ −242.61, 327.55]; Left: b = 83.92, t(55) = 0.57, p = 0.57, r2 = 0.03, 95% CI [−212.82, 380.67]]"

Discussion¶

Related Claims¶

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