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Test materials for Ahn, Chang, DeKeyser, and Lee-Ellis (2017, "Age effects in first language attrition", Language Learning), which are shareable publicly according to the study's IRB protocol: (1) the Language Background Questionnaire, which is provided in Excel format (.xlsx), and (2) the Listening Proficiency Test (i.e., the 'Intermediate A' listening comprehension section of the 18th Test of Proficiency in Korean), which is accessible from the link provided in the journal article as well as from the links below. The auditory stimuli used in the Speeded Sequence Recall task are not shareable for privacy reasons, but are reproducible with the information provided in the journal article.
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