Perceptual dimensions used to differentiate dysarthria types include which of the following?

• A. Pitch
• B. Color
• C. Language comprehension
• D. Handedness

Answer: (A)

In evaluating dysarthria, perceptual features of voice and speech are used to differentiate types, with pitch being a key aspect. Pitch reflects the variation in vocal fundamental frequency and reveals how well the laryngeal muscles and neural control are coordinating prosody. Different dysarthria types produce distinct pitch patterns, such as monotone speech or abnormal pitch variability, which clinicians listener to classify the type. The other options don’t describe how speech is produced or heard: color isn’t a feature of spoken language, language comprehension concerns understanding rather than production, and handedness has no relevance to the motor speech characteristics used to distinguish dysarthria types.