title: Accuracy of Self-Reported Estimates of Daily Voice Use in Adults With Normal and Disordered Voices.
abstract: Accurate estimation of daily patterns of vocal behavior is essential to understanding the role of voice use in voice disorders. Given that clinicians currently rely on patient self-report to assess daily vocal behaviors, this study sought to assess the accuracy with which adults with and without voice disorders can estimate their amount of daily voice use in terms of phonation time.
  
  
  
  Eighteen subjects (6 patients, 6 matched members of a control group without voice disorders, 6 low voice users) wore the accelerometer-based Ambulatory Phonation Monitor (APM; model 3200, KayPENTAX, Montvale, NJ) for at least 5 workdays. Subjects were instructed to provide hourly self-reports of time spent talking using a visual analog scale. Spearman correlation coefficients and errors between self-reported and APM-based estimates of phonation time revealed subject- and group-specific characteristics.
  
  
  
  A majority of subjects exhibited a significant bias toward overestimating their phonation times, with an average absolute error of 113%. Correlation coefficients between self-reported and APM-based estimates of phonation time ranged from statistically nonsignificant to .91, reflecting large intersubject variability.
  
  
  
  Subjects in all 3 groups were moderately accurate at estimating their hourly voice use, with a consistent bias toward overestimation. The results support the potential role that ambulatory monitoring could play in improving the clinical assessment of voice disorders.
authors: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonHarvard Medical School, Boston, MAInstitute of Health Professions, Massachusetts General Hospital, Boston.
authors: Daryush D
authors: DD
authors: Mehta
authors: Bioacoustic Research Program, Lab of Ornithology, Cornell University, Ithaca, NY.
authors: Harold A
authors: HA
authors: Cheyne
authors: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston.
authors: Asa
authors: A
authors: Wehner
authors: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonHarvard Medical School, Boston, MAInstitute of Health Professions, Massachusetts General Hospital, Boston.
authors: James T
authors: JT
authors: Heaton
authors: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonHarvard Medical School, Boston, MAInstitute of Health Professions, Massachusetts General Hospital, Boston.
authors: Robert E
authors: RE
authors: Hillman
mesh_terms: D000328:Adult; D006801:Humans; D018670:Monitoring, Ambulatory; D010699:Phonation; D057566:Self Report; D014831:Voice; D014832:Voice Disorders / Q000503:physiopathology*; D014833:Voice Quality