Before I had children and witness #acquisition every day, I thought the theory of #Universal #Bilingualism by #Roeper was unparsimonious. Now, having seen #CLA in action, it's clear there are stages where 2 possible analyses and/or structures compete. We've been varying "did + infinitive" and "did + past participle" for a few months. Maybe it's because of less data due to German/English bilingualism or some strange CLI effect (because Germany doesn't do that), but it's not the first such rodeo!

Before I had children and witness #acquisition every day, I thought the theory of #Universal #Bilingualism by #Roeper was unparsimonious. Now, having seen #CLA in action, it's clear there are stages where 2 possible analyses and/or structures compete. We've been varying "did + infinitive" and "did + past participle" for a few months. Maybe it's because of less data due to German/English bilingualism or some strange CLI effect (because Germany doesn't do that), but it's not the first such rodeo!