When PSID-CDS data are restricted to ages 6–11, backward digit span growth is best characterized by a quadratic (not cubic) function¶

Claim · All claims
Evidence · 1 study · associational r3 · q3
Currency · newest study 2022 · not yet checked against its sources · not reviewed by a person · recheck by 2027: baselines and conditions change

Subclaims¶

q3 i? In the age-restricted PSID-CDS comparison analysis, the cubic coefficient was non-significant and the quadratic form was the best fitting model. → Ahmed 2022

Evidence¶

Ahmed 2022¶

Ahmed, S. F., Ellis, A., Ward, K. P., Chaku, N., & Davis-Kean, P. E. (2022). Working memory development from early childhood to adolescence using two nationally representative samples. Developmental Psychology. https://doi.org/10.1037/dev0001396

q3 · i? · associational · r3

Comparison analysis restricting PSID-CDS to ages 6–11 to mirror ECLS-K:2011: "the cubic coefficient was non-significant (b = 0.015, p = .208)", so the quadratic form with b = −0.101, p < .001 was selected.

"the cubic coefficient was non-significant (b = 0.015, p = .208). Therefore, the best fitting model was the quadratic functional form, which had the next-lowest model fit indices and a statistically significant growth coefficient (AIC =104487838; BIC =104487868; b =−0.101, p <.001)."

Discussion¶

Related Claims¶

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