This study classified speech impairment in 200 patients with Parkinson's disease (PD) into five levels of overall severity and described the corresponding type (voice, articulation, fluency) and extent (rated on a five-point scale) of impairment for each level. From two-minute conversational speech samples, parameters of voice, fluency and articulation were assessed by two trained-raters. Voice was found to be the leading deficit, most frequently affected and impaired to a greater extent than other features in the initial stages. Articulatory and fluency deficits manifested later, articulatory impairment matching voice impairment in frequency and extent at the `Severe' stage. At the final stage of `Profound' impairment, articulation was the most frequently impaired feature at the lowest level of performance. This study illustrates the prominence of voice and articulatory speech motor control deficits, and draws parallels with deficits of motor set and motor set instability in skeletal controls of gait and handwriting.

PurposeTo determine the effect of audit firm rotation and/or audit partner rotation on individuals' confidence in the quality of audited financial statements.Design/methodology/approachTwo separate behavioral studies were conducted with participants from the business and legal community (MBA and law students). In each study, one‐way analysis of variance was conducted using a between‐subjects approach. The independent measure was auditor rotation; the dependent measure was participants' responses to questions regarding company earnings. Because an experimental approach was utilized, the stimulus materials excluded potentially relevant information for this task. In addition, the participants were not held accountable for their decisions, nor was there any explicit motivation provided. Future research could explore other richer more complex case scenarios that provides some explicit motivation for participants.FindingsResults revealed that even in an environment of strong controls for corporate governance, audit firm rotation incrementally influenced individuals' confidence in financial statements. However, audit partner rotation did not have a similar effect.Originality/valueLittle if any research examines both audit firm rotation and audit partner rotation. This research fills this void by addressing both concepts. The results suggest that rotating the audit firm will, contrary to GAO assumptions, better advance the goal to enhance auditor independence and audit quality and to restore investor confidence in the capital markets.

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