Novel ERP Evidence for Processing Differences Between Negative and Positive Polarity Items in German

Area of Science:

• Linguistics
• Cognitive Neuroscience
• Psycholinguistics

Background:

• Theoretical linguistics debates the parallelism of negative and positive polarity items.
• Previous event-related potential (ERP) studies yielded inconsistent findings on polarity violations.

Purpose of the Study:

• To investigate the neural correlates of negative and positive polarity violations in German using ERPs.
• To determine if polarity items exhibit parallel processing or distinct mechanisms.

Main Methods:

• An ERP study was conducted on German speakers.
• Participants' brain responses to correct and incorrect polarity items were recorded.

Main Results:

• Both negative and positive polarity violations elicited biphasic N400/P600 effects compared to correct conditions.
• Negative polarity violations showed a P600-only effect relative to positive polarity violations.
• No graded N400 effect was observed, indicating similar semantic processing costs for both violation types.

Conclusions:

• Negative and positive polarity violations share semantic processing costs but differ in syntactic versus pragmatic reanalysis.
• The findings suggest that negative and positive polarity violations involve at least partially distinct neural mechanisms.
• Polarity items are not entirely parallel in their linguistic processing.