摘要：Deficits in the perception of speech, aftctive, and linguistic prosody are well-documented among persons with Parkinson’s Disease (PD) (Pell and Leonard，2003)• However，the mechanisms underlying these perceptual deficits remain unclear. One substantive question is whether these deficits reflect insensitivity to a particular acoustic property of speech such as pitch, amplitude, or duration. Here we addressed this question with the goal of discerning an acoustic basis for higher-level speech perception deficits in PD. We specifically examined whether persons with PD experience selective deficits in the perception of one of three salient properties of sound (i.e., pitch, amplitude, or duration). Alternatively, we examined whether patients9 deficits are linked to general executive resource limitations that produce homogeneous impairments in discriminating “close” perceptual distinctions independent of the manipulated property.
