Using a real-time vowel formant filtering system, F1 of children¡¦s productions of the word ¡§head¡¨ /hɛd/ were shifted in real time and played to participants over headphones. This manipulated auditory feedback was shifted +340 Hz (/ɛ/ -> /æ/) in one condition and -230 Hz (/ɛ/ -> /ɪ/) in a second condition. Total compensation for this manipulated auditory feedback was monitored. On average, compensation occurred to oppose the manipulation. Children with Specific Language Impairment compensated significantly more than typically developing children.
Index Terms: auditory feedback, shifted formants, Specific Language Impairment.