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Publications - Joseph R . Duffy, Ph.D.

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  1. Wang Y, Kent RD, Kent JF, Duffy JR, Thomas JE. Acoustic analysis of voice in dysarthria following stroke. Clin Linguist Phon 2009 May; 23(5):335-47.
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  2. Wang YT, Kent RD, Finley J, Duffy JR, Thomas JT:. Acoustic analysis of voice in dysarthria following stroke. Clinical Linguistics & Phonetics 2009; 23:335-47.
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  3. Wang YT, Kent RD, Duffy JR, Thomas JT. Analysis of diadochokinesis in ataxic dysarthria using the Motor Speech Profile Folia Phoniatrica et Logopaedica 2009 Epub 0.
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  4. Czarnecki K, Duffy JR, Nehl CR, Cross SA, Molano JR, Jack CR Jr, Shiung MM, Josephs KA, Boeve BF. Very early semantic dementia with progressive temporal lobe atrophy: an 8-year longitudinal study. Arch Neurol 2008 Dec; 65(12):1659-63.
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  5. Josephs KA, Duffy JR. Apraxia of speech and nonfluent aphasia: a new clinical marker for corticobasal degeneration and progressive supranuclear palsy. Curr Opin Neurol 2008 Dec; 21(6):688-92.
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  6. Duffy JR. Motor speech disorders and the diagnosis of neurologic disease: still a well-kept secret? ASHA Leader 2008 Nov 25; 13(16):10-3.
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  7. Josephs KA, Whitwell JL, Duffy JR, Vanvoorst WA, Strand EA, Hu WT, Boeve BF, Graff-Radford NR, Parisi JE, Knopman DS, Dickson DW, Jack CR Jr, Petersen RC. Progressive aphasia secondary to Alzheimer disease vs FTLD pathology. Neurology 2008 Jan 1; 70(1):25-34.
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  8. Czarnecki K, Duffy JR, Nehl CR, Cross SA, Molano JR, Jack CR, Shiung MM, Josephs KA, Boeve BF: Very early semantic dementia with progressive temporal lobe atrophy. Very early semantic dementia with progressive temporal lobe atrophy Arch Neurol 2008.
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  9. Josephs KA, Duffy JR. Apraxia of speech, nonfluent aphasia: a new clinical marker for corticobasal degeneration, progressive supranuclear palsy. Neurology 2008; 21(688-692).
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  10. Bunton K, Kent RD, Duffy JR, Rosenbek JC, Kent JF. Listener agreement for auditory-perceptual ratings of dysarthria. J Speech Lang Hear Res 2007 Dec; 50(6):1481-95.
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  11. Duffy JR, Peach RK, Strand EA. Progressive apraxia of speech as a sign of motor neuron disease. Am J Speech Lang Pathol 2007 Aug; 16(3):198-208.
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  12. Duffy JR, Peach RK, Strand EA. Progressive apraxia of speech as a sign of motor neuron disease American Journal of Speech-Language Pathology 2007; 16:198-208.
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  13. Wambaugh JL, Duffy JR, McNeil MR, Robin DA, Rogers MA, Boyle M. Treatment guidelines for acquired apraxia of speech: a synthesis and evaluation of the evidence. J Med Speech Lang Pathol 2006 Jun; 14(2):xv-xxxiii.
  14. Wambaugh JL, Duffy JR, McNeil MR, Robin DA, Rogers MA. Treatment guidelines for acquired apraxia of speech: treatment descriptions and recommendations. J Med Speech Lang Pathol 2006 Jun; 14(2):xxxv-lxvii.
  15. Shriberg LD, Ballard KJ, Tomblin JB, Duffy JR, Odell KH, Williams CA. Speech, prosody, and voice characteristics of a mother and daughter with a 7;13 translocation affecting FOXP2. J Speech Lang Hear Res 2006 Jun; 49(3):500-25.
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  16. Josephs KA, Duffy JR, Strand EA, Whitwell JL, Layton KF, Parisi JE, Hauser MF, Witte RJ, Boeve BF, Knopman DS, Dickson DW, Jack CR Jr, Petersen RC. Clinicopathological and imaging correlates of progressive aphasia and apraxia of speech. Brain 2006 Jun; 129(Pt 6):1385-98. Epub 2006 Apr 13.
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  17. Duffy JR. Apraxia of speech in degenerative neurologic disease. Aphasiology 2006 Jun; 20(6):511-27.
  18. Rosen KM, Kent RD, Delaney AL, Duffy JR. Parametric quantitative acoustic analysis of conversation produced by speakers with dysarthria and healthy speakers. J Speech Lang Hear Res 2006 Apr; 49(2):395-411.
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  19. Josephs KA, Petersen RC, Knopman DS, Boeve BF, Whitwell JL, Duffy JR, Parisi JE, Dickson DW. Clinicopathologic analysis of frontotemporal and corticobasal degenerations and PSP. Neurology 2006 Jan 10; 66(1):41-8.
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  20. Wang YT, Kent RD, Duffy JR, Thomas JE, Fredericks GV. Dysarthria following cerebellar mutism secondary to resection of a fourth ventricle medulloblastoma: A case study. J Med Speech Lang Pathol 2006; 14(2):109-22.
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  21. Shriberg LD, Ballard KJ, Tomblin JB, Duffy JR, Odell KH, Williams CA. Speech, prosody, and voice characteristics of a mother and daughter with a 7:13 translocation affecting FOXP2 Journal of Speech, LANGUAGE, AND Hearing Research 2006; 49:500-525.
  22. Rosen KM, Kent RD, Delaney AL, Duffy JR. Parametric quantitative acoustic analysis of conversation produced by speakers with dysarthria and healthy speakers. Journal of Speech-Language-Hearing Research 2006; 49:395-411.
  23. Baylor CR, Yorkston KM, Eadie TL, Strand EA, Duffy JR. A systematic review of outcome measurement in unilateral vocal fold paralysis. Journal of Medical Speech-Language Pathology 2006; 14(1):xxvii-lvii.
  24. Wang Y-T, Kent RD, Duffy JR, Thomas JE, Fredericks GV. Dysarthria following cerebellar mutism secondary to resection of a fourth ventricle medulloblastoma: a case study Journal of Medical Speech-Language Pathology, 14, 109-122 2006; 14:109-122.
  25. Baylor CR, Yorkston KM, Eadie TL, Strand EA, Duffy J. A systematic review of outcome measurement in unilateral vocal fold paralysis. J Med Speech Lang Pathol 2006; 14(1):xxvii-lvii.
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  26. Paslawski T, Duffy JR, Vernino S. Speech and language findings associated with paraneoplastic cerebellar degeneration. Am J Speech Lang Pathol 2005 Aug; 14(3):200-7.
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  27. Josephs KA, Boeve BF, Duffy JR, Smith GE, Knopman DS, Parisi JE, Petersen RC, Dickson DW. Atypical progressive supranuclear palsy underlying progressive apraxia of speech and nonfluent aphasia. Neurocase 2005 Aug; 11(4):283-96.
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  28. Duffy JR. Managing primary progressive aphasia. (Invited article). National Aphasia Association News Bulletin May 2, 2005.
  29. Wang YT, Kent RD, Duffy JR, Thomas JE. Dysarthria associated with traumatic brain injury: Speaking rate and emphatic stress. J Commun Disord 2005 May-Jun; 38(3):231-60.
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  30. Wang YT, Kent RD, Duffy JR, Thomas JE. Dysarthria in traumatic brain injury: a breath group and international analysis. Folia Phoniatrica et Logopaedica 2005 Mar-Apr; 57(2):59-89.
  31. Rosen KM, Kent RD, Duffy JR. Task-based profile of vocal intensity decline in Parkinson's disease. Folia Phoniatrica et Logopaedica 2005 Jan-Feb; 57(1):28-37.
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  32. Wang YT, Kent RD, Duffy JR, Thomas JE, Weismer G. Alternating motion rate as an index of speech motor disorder in traumatic brain injury. Clin Linguist Phon 2004 Jan-Feb; 18(1):57-84.
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  33. Wang YT, Kent RD, Duffy JR, Thomas JE, Weismer G. Syllable alternating motion rates as an index of motor speech abilities in traumatic brain injury. Clinical Linguistics & Phonetics 2004; 18:57-84.
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  34. Duffy JR, Yorkston KM. ANCDS bulletin board. Medical interventions for spasmodic dysphonia and some related conditions: a systematic review. J Med Speech Lang Pathol 2003 Dec; 11(4):ix-lviii.
  35. Blake ML, Duffy JR, Boeve BF, Ahlskog JE, Maraganore DM. Speech and language disorders associated with corticobasal degeneration. J Med Speech Lang Pathol 2003 Sep; 11(3):131-46.
  36. Rosen KM, Kent RD, Duffy JR. Lognormal distribution of pause length in ataxic dysarthria. Clin Linguist Phon 2003 Sep; 17(6):469-86.
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  37. Rosen KM, Kent RD, Duffy JR. Lognormal distribution of pause length in ataxic dysarthria. Clin Linguist Phon 2003 Sep; 17(6):469-86.
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  38. Kent RD, Vorperian HK, Kent JF, Duffy JR. Voice dysfunction in dysarthria: application of the Multi-Dimensional Voice Program. J Commun Disord 2003 Jul-Aug; 36(4):281-306.
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  39. Yorkston KM, Spencer KA, Duffy JR. Behavioral management of respiratory/phonatory dysfunction from dysarthria: a systematic review of the evidence. J Med Speech Lang Pathol 2003 Jun; 11(2):13-38.
  40. Spencer KA, Yorkston KM, Duffy JR. Behavioral management of respiratory/phonatory dysfunction from dysarthria: a flowchart for guidance in clinical decision making. J Med Speech Lang Pathol 2003 Jun; 11(2):39-61.
  41. Blake ML, Duffy JR, Tompkins CA, Myers PS. Right hemisphere syndrome is in the eye of the beholder. Aphasiology 2003 May; 17(5):423-32.
  42. Frattali C, Duffy JR, Litvan I, Patsalides AD, Grafman J. Yes/no reversals as neurobehavioral sequela: a disorder of language, praxis, or inhibitory control? Eur J Neurol 2003 Jan; 10(1):103-6.
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  43. Boeve B, Dickson D, Duffy J, Bartleson J, Trenerry M, Petersen R. Progressive nonfluent aphasia and subsequent aphasic dementia associated with atypical progressive supranuclear palsy pathology. Eur Neurol 2003; 49(2):72-8.
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  44. Duffy JR, Yorkston KM. Medical Interventions for Spasmodic Dysphonia and Some Related Conditions: A Systematic. (Review) Journal of Medical Speech-Language Pathology 2003; 11:ix-lviii.
  45. Duffy JR, Kent RD, Kent JF. The contribution of motor speech disorders to understanding speech motor control. D. Recasesn et al. (eds), Proceeding of the 15th International Congress of Phonetic Sciences (Barcelona, August 3-9) 2003.
  46. Blake ML, Duffy JR, Myers PS, Tompkins CA. Prevalence and patterns of right hemisphere cognitive/communicative deficits: Retrospective data from an inpatient rehabilitation unit. Aphasiology 2002 Apr-Jun; 16(4-6):537-47.
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  47. Lehman BM, Duffy JR, Myers PS, Tompkins CA. Prevalence oand patterns of right hemisphere cognitive/communicative deficits: Retrospective data from an inpatient rehabilitation unit. Aphasiology 2002; 16:537-47.
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  48. Meyer FB, Bates LM, Goerss SJ, Friedman JA, Windschitl WL, Duffy JR, Perkins WJ, O'Neill BP. Awake craniotomy for aggressive resection of primary gliomas located in eloquent brain. Mayo Clin Proc 2001 Jul; 76(7):677-87.
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  49. Duffy JR, Kent RD. Darley's contributions to the understanding, differential diagnosis, and scientific study of the dysarthrias. Aphasiology 2001 Mar; 15(3):275-289.
  50. Kent RD, Duffy JR, Slama A, Kent JF, Clift A. Clinicoanatomic studies in dysarthria: review, critique, and directions for research. Journal of Speech Language, and Hearing Research 2001; 44:535-51.
  51. Bunton K, Kent RD, Kent JF, Duffy JR. The effects of flattening fundamental frequency contours on sentence intelligibility in a speaker with dysarthria. Clinical Linguistics and Phonetics 2001; 15:181-94.
  52. Yorkston KM, Spencer KA, Duffy JR, Beukelman DR, Golper LA, Miller RM, Strand EA, Sullivan M. Evidence-Based Practice Guidelines for Dysarthria: Management of Velopharyngeal Function. Journal of Medical Speech-Language Pathology 2001; 9(4):257-73.
  53. Uitti RJ, Wharen RE, Duffy JR, Lucas JA, Schneider SL, Rippeth JD, Wszolek ZK, Obwegeser AA, Turk MF, Atkinson EJ. Unilateral pallidotomy for Parkinson's disease: speech, motor, and neuropsychological outcome measurements. Parkinsonism & Related Disorders 2000 Jul; 6(3):133-143.
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  54. Kent RD, Kent JF, Duffy JR, Weismer G, Stuntebeck S. Ataxic dysarthria. Journal of Speech-Language-Hearing Research 2000;43:1275-89.
  55. Kent RD, Kent JF, Weismer G, Duffy JR. What dysarthrias can tell us about the neural control of speech. Journal of Phonetics 2000; 28:273-302.
  56. Schneider SL, Wijdicks EFM, Duffy JR, O'Brien TJ. Wernicke's aphasia after putaminal hemorrhage: unusual clinical and SPECT findings. Aphasiology 1999 Sep-Nov; 13(9-11):755-765.
  57. Kent RD, Duffy JR, Kent JF, Vorperian HK, Thomas JE. Quantification of motor speech abilities in stroke: Time-energy analysis of syllable and word repetition. Journal of Medical Speech-Language Pathology 1999; 7:83-90.
  58. Kent RD, Vorperian HK, Duffy JR. Reliability of the Multidimensional Voice Program for the analysis of voice samples of subjects with dysarthria. American Journal of Speech-Language Pathology 1999; 8:129-36.
  59. Kent RD, Weismer G, Kent JF, Vorperian HK, Duffy JR. Acoustic studies of dysarthric speech: Methods, progress, and potential. Journal of Communication Disorders 1999; 32:141-86.
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  60. Duffy JR. Stroke with dysarthria: evaluate and treat; garden variety or down the garden path? Seminars in Speech & Language 1998; 19(1):93-8; quiz 99.
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  61. Kent RD, Kent JF, Duffy JR, Weismer G. The dysarthrias: Speech-voice profiles, related dysfunctions, and neuropathology. Journal of Medical Speech-Language Pathology 1998; 6(4):165-211.
  62. Kent RD, Duffy JR, Vorperian HK, Thomas JE. Severe essential vocal and oromandibular tremor: A case report. Phonoscope 1998; 1(4):237-53.
  63. Duffy JR, Werven GW, Aronson AE. Telemedicine and the diagnosis of speech and language disorders. Mayo Clin Proc 1997 Dec; 72(12):1116-22.
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  64. Baumgartner J, Duffy JR. Psychogenic stuttering in adults with and without neurologic disease. Journal of Medical Speech-Language Pathology 1997; 5:75-95.
  65. Boutsen FR, Bakker K, Duffy JR. Subgroups in ataxic dysarthria. Journal of Medical Speech-Language Pathology 1997; 5:27-36.
  66. Duffy JR, Folger WN. Dysarthria associated with unilateral central nervous system lesions: a retrospective study. J Med Speech Lang Pathol 1996 Jun; 4(2):57-70.
  67. Lutsep HL, Duffy JR, Cascino GD. Frequency, risk factors, and characterization of aphasia following left temporal lobectomy. Journal of Medical Speech-Language Pathology 1995; 3:191-8.
  68. Duffy JR. Why differential diagnosis? Special Interest Division 2 Newsletter 1995; 5:2-6.
  69. Duffy RJ, Watt JH, Duffy JR. Testing causal theories of pantominic deficits in aphasia using path analysis. Aphasiology 1994 Jul-Aug; 8:361-379.
  70. Philbrick KL, Rummans TA, Duffy JR, Kokmen E, Jack CR Jr. Primary progressive aphasia. An uncommon masquerader of psychiatric disorders. Psychosomatics 1994 Mar-Apr; 35(2):138-41.
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  71. Duffy RJ, Watt JH, Duffy JR. The construct validity of the limb apraxia test (lat): implications for the distinction between types of limb apraxia. Clinical Aphasiology 1994; 22:181-190.
  72. Duffy JR. Emerging and future concerns in motor speech disorders. American Journal of Speech-Language Pathology 1994; 3:36-9.
  73. Duffy JR. Path analysis. Clinical Aphasiology 1993; 21:47-57.
  74. Duffy JR, Petersen RC. Primary progressive aphasia. Aphasiology 1992 Jan/Feb; 6:1-15.
  75. Burroughs EI, Aronson AE, Duffy JR, Kyle RA. Speech disorders in systemic amyloidosis. Br J Disord Commun 1991 Aug; 26(2):201-6.
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  76. Caselli RJ, Ivnik RJ, Duffy JR. Associative anomia: dissociating words and their definitions. Mayo Clin Proc 1991 Aug; 66(8):783-91.
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  77. Duffy RJ, Duffy JR. An investigation of body part as object (BPO) responses in normal and brain-damaged adults. Brain & Cognition 1989 Jul; 10(2):220-36.
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  78. Kelly PJ, Ahlskog JE, Goerss SJ, Daube JR, Duffy JR, Kall BA. Computer-assisted stereotactic ventralis lateralis thalamotomy with microelectrode recording control in patients with Parkinson's disease. Mayo Clin Proc 1987 Aug; 62(8):655-64.
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  79. Duffy JR. Slowly progressive aphasia. Clinical Aphasiology 1987; 17:349-356.
  80. Mackisack EL, Myers PS, Duffy JR. Verbosity and labeling behavior: the performance of right hemisphere and non-brain-damaged adults on an inferential picture task. Clinical Aphasiology 1987; 17:143-151.
  81. Duffy JR. Sweet sixteen or middle age? Welcome and opening remarks. Clinical Aphasiology 1986; (16):IV-VI.
  82. Duffy JR. Invited comment on Baratz's manual communication for a global aphasic: a case study. Aphasia Apraxia Agnosia 1985; 3(4):27-43.
  83. Duffy JR, Watkins LB. The effect of response choice relatedness on pantomime and verbal recognition ability in aphasic patients. Brain & Language 1984 Mar; 21(2):291-306.
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  84. Duffy JR. Nuclear magnetic resonance (NMR): background and potential impact on the practice of speech language pathology. Clinical Aphasiology 1984; 7-13.
  85. Duffy RJ, Duffy JR, Mercaitis PM. Comparison of the performances of a fluent and a nonfluent aphasic on a pantomime referential task. Brain Lang 1984; 21:260-273.
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  86. Duffy JR. Babies, bath water, and monkeys. Clinical Aphasiology 1983; 285-288.
  87. Gigley HM, Duffy JR. The contribution of clinical intelligence and artificial aphasiology to clinical aphasiology and artificial intelligence. Clinical Aphasiology 1982; 170-177.
  88. Duffy JR, Watt J, Duffy RJ. Path analysis: a strategy for investigating multivariate causal relationships in communication disorders. Journal of Speech & Hearing Research 1981 Dec; 24(4):474-90.
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  89. Duffy JR. What is aphasia? A round table discussion. Clinical Aphasiology 1981; 327-329.
  90. Duffy RJ, Duffy JR. Three studies of deficits in pantomime recognition and pantomime expression in aphasia. J Speech Hear Res 1981; 24:70-84.
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  91. Duffy JR, Keith RL. Performance of non-brain-injured adults on the pica: descriptive data and a comparison to patients with aphasia. Aphasia Apraxia Agnosia 1980; 2:1-29.
  92. Duffy JR, Boyle M, Plattner L. Listener reactions to personal characteristics of fluent and nonfluent aphasic speakers. Clinical Aphasiology 1980; 117-126.
  93. Duffy JR, Watt J, Duffy RJ. Deficits of nonverbal communication in aphasic patients: a test of some current causal theories. Clinical Aphasiology 1978; 153-163.
  94. Duffy JR, Keith RL, Shane HL, Podraza BL. Performance of norm (non-brain-injured) adults on the Porch index of communicative ability. Clinical Aphasiology 1976; 32-42.
  95. Duffy RJ, Duffy JR, Pearson KL. Pantomime recognition in aphasic. J Speech Hear Res 1975; 18:115-132.
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  96. Duffy JR, Duffy RJ, Pearson KL. Verbal comprehension and overall aphasic impairment: relationship between the token test and pica. J MSHA 1975; 14:1-13.
  97. Duffy JR, Giolas TG. Sentence intelligibility as a function of key word selection. Journal of Speech & Hearing Research 1974 Dec; 17(4):631-7.
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  98. Giolas TG, Duff JR. Equivalency of CID and revised CID sentence lists. Journal of Speech & Hearing Research 1973 Dec; 16(4):549-55.
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  99. Giolas TG, Duffy JR, Duffy RJ, Cooker HS, Sergeant RL. Equivalency of sentence intelligibility lists for audiological assessment of naval personnel and Navy voice communication systems. Naval Submarine Medical Research Laboratory Report 1973 Sep; 759:1-9.
  100. Duffy JR, Giolas TG, Sergeant RL. The effect of word predictability on sentence intelligibility. Naval Submarine Medical Research Laboratory Report 1971 Jul; 672:1-8.
  101. Giolas TG, Cooker HA, Duffy JR. Studies of voice communication in the Navy: sentence predictability. Submarine Medical Research Laboratory Naval Submarine Medical Center Report 1971 Feb; 653:1-11.
  102. Giolas TG, Coo-Er HA, Duffy JR. The predictability of words in sentences. J Aud Res 1970; 10:328-334.
  103. Russotti JS, Duffy JR. An evaluation of three methods of unscrambling helium speech at depths of 800 and 1000 feet. Naval Submarine Medical Research Laboratory Report 1969 Oct; 602:1-5.


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