The study replicates Johnson and Newport (1989) and explains the apparent exceptions in that study¶

Claim · All claims
Evidence · 1 study · associational r? · q3
Currency · newest study 2000 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? The findings replicate those of Johnson and Newport (1989) and provide an explanation for the apparent exceptions in their study. → Robert M. DeKeyser 2000

Evidence¶

Robert M. DeKeyser 2000¶

Robert M. DeKeyser. (2000). THE ROBUSTNESS OF CRITICAL PERIOD EFFECTS IN SECOND LANGUAGE ACQUISITION. Studies in Second Language Acquisition, Volume 22, Issue 4. https://doi.org/10.1017/S0272263100004022

q3 · i? · associational · r?

The article states its replication of Johnson and Newport (1989) directly: "This study replicates the findings of Johnson and Newport (1989)" and claims to explain the apparent exceptions via verbal analytical ability.

"This study replicates the findings of Johnson and Newport (1989) and provides an explanation for the apparent exceptions in their study."

Discussion¶

Related Claims¶

• Early ability to delay gratification predicts later academic and social outcomes, but the association is weaker and more context-dependent than originally reported. — related
• Verbal analytical ability is not a significant predictor of second language success for childhood arrivals — related
• Prior small-sample critical-period findings were too noisy to provide precise estimates; thousands of subjects are required — related