Speakers use pitch variation to signal statements versus questions

Evidence

The speakers actively vary f0, or pitch, to convey the utterance information. These variations are called intonation. It can be used for a range of purposes, depending on language, such as indicating emotions and attitudes or signalling the difference between statements and questions. Intonation is also used to focus attention on important words of the spoken message and to help regulate conversational interaction. In tone languages, such as Table 5. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 586

Categorization

• QUESTION: The excerpt trails off into tone languages at the end but the rubric requires a complete stopping point; the core intonation point stands on its own.
• corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 586