**Connect** Please join us for Poster Session C on Saturday 3/21 from 12-2. We'll be monitoring comments here on OSF, keeping an eye on twitter (tag @clukyanenko), and hanging out on zoom (psu.zoom.us/j/302082911). We'd love to discuss this work with you! **Short Abstract** We probed Mainstream American English (MAE) speakers’ processing and interpretation of Negative Concord (NC) and Negative Polarity Item (NPI) structures (*the news anchor didn’t warn nobody/anybody*) to better understand their status in MAE-speakers’ grammars. Participants (N=53) read two-clause sentences with NC, NPI or bare plural (*didn’t warn people*) first clauses, followed by second clauses that supported a single-negation reading. Slowdowns upon first encountering NC structures indicated that they were unexpected, but the lack of downstream effects of difficulty or misinterpretation supports theories that model the constructions similarly. Conditional contexts were also examined (*if the news anchor warned people/anybody/nobody*).